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MDM Minutes Here the minutes of all MDMs are kept main.html

SLS 2.0 Machine Development Meetings

Info

Here the minutes of the regular Machine Development Meetings are kept. Ad Hoc meetings on specific topics are usually documented on indico. The minutes of the SLS 2.0 Beam Development Meetings from the commissioning phase can be found here.

17/12/2025

Participants: {{Alessandro}}, {{Rebecca}}, {{RomainG}}, {{Volker}}, {{Simona}}, {{Cigdem}}, {{Micha}}, {{Michael}}, {{Felix}}

  1. Introduction

    • Approval of last minutes

      • All those present confirm the minutes of the last meeting.

    • Communication

      • The current machine schedule is available at https://sls.psi.ch/schedule/.
      • Please send shift requests ahead of the MDM meetings.
      • Elog
        • Please prepare your shift reports in the elog before the next MDM.
        • Any changes made to the machine (e.g., exchanged components, optics/orbit or machine interlock bridges) must be documented in the operational elog
        • Maintenance and repair activities must also be documented in the operational elog
        • details can be put in the according expert elogs and linked
      • Control Room Etiquette
        • Please keep voices down in the control room and go elsewhere for intense discussions.
        • Please remember to always keep the control room informed, i.e., talk to the operators before starting and after finishing your shift/maintenance/repair work
        • Spontaneous on-site shifts, e.g., over the weekend or night should be announced in advance to the control room.

  2. Reports

    • Operation by {{Felix}}

      • Linac optimization
        • {{ElogOP(63459)}}
        • These scans will be done on regular basis
        • More documentation from Linac Team in OP elog would be very appreciated
        • High charge setting delivers significantly less charge than before
        • Attendance of Linac Team at MDM would be very appreciated
      • X11 / UE36
        • {{ElogOP(63474)}}
        • Motors stuck, root cause within drive chain initially unclear
        • First repair attempt failed after 2 hour tunnel access during machine development Tuesday morning, 02.12.2025
        • Second repair attempt successful after 4 hour tunnel access during beamline development shift on Wednesday morning, 10.12.2025
      • X02SA / I-TOMCAT
        • {{ElogOP(63486)}}
        • Wrong orbitbumps found their way into the operation snapshot during last week's machine development Tuesday, 09.12.2025
        • Went unnoticed until call from beamline Friday morning (they did mention that they had been scratching their heads for quite a while)
        • Please take great care to undo all changes after your development shifts
      • Mysterious lifetime steps
        • Sudden loss of ~2 hours of lifetime with sudden recovery after multiple hours observed more than once and root cause remains unclear
        • {{ElogOP(63555)}}
      • Packetfence issue with Red Pitaya of pulsed magnets
        • {{ElogOP(63437)}}
        • ssh connection not possible until restart switchport from packetfence
      • Critical Beam Dump
        • Mon 08-Dec-25 09:02, Post Mortem Log: {{ElogOP(63420)}}
        • Investigation Log: {{ElogOP(63420)}}
        • Misfiring of injection bump due to unresolved reboot issue of Red Pitaya occurring during injection
      • Rapid current drop beam dump
        • Mon 15-Dec-25 15:54, Post Mortem Log: {{ElogOP(63526)}}
        • Investigation Log: {{ElogOP(63527)}}
        • Coincided with large vacuum peaks in X03 at location of transverse MBFB kickers
        • Coincided with reduced dose on beam dump indicating partial beam loss before beam dump kicker fired
        • Coincided with peak on CMOS loss monitor in the beginning of arc 3
      • MD during user operation with beam excitation
        • elog
      • Vibrations WSLA Monday, 15.12.2025
        • observed between 13:30 and 14:00 on, e.g., X01DD POS-Y but not on beam
        • reported by Debye
        • what is the status of vibration measurements for SLS 2.0?
      • Archive Viewer Scripts broken
        • update arguments from "-xzy=blabla" to "-xyz blabla"
      • IPAC'2026

    • LTB/BRTL by {{Volker}}

      • LTB upgrade has begin

    • Impedances and MBFB kickers by {{Micha}}

      • 5 nC single bunch decaying beam from last week checked from archive data RF Log
      • 5 nC single bunch decaying beam measurement from yesterday not yet investigated

    • Diagnostics by {{Cigdem}}

      • See slides
      • Vibration contribution of FOFB, pumps etc. limited to 0.6 um, i.e., negligible
      • Mounting of silicon crystal mono at different temperature than 25 C could explain upto 2 um
      • Michael points out that non-gaussian tails of beam from IBS, Touschek, etc. could also contribute significantly to error of beam size measurement

    • Feedbacks and BPMs by {{Boris}}

      • ...

    • Timing by {{Romain}}

      • New split up up Pinger events currently injection events
      • ABOMA plit up between ABOMA-B and the others

  3. Shift Summaries

    • ID Tune shifts by {{Simona}}

  4. Shift Requests

    Hours Machine Contact Description Scheduled
    1 50 mA {{Pedro}} and {{Felix}} Test horizontal/vertical bunch-by-bunch waveform readout {{o}}
    4 50 mA {{Pedro}} and {{Felix}} Test fast excitation sweeping or broadband excitation using the MBFB {{o}}
    4 50 mA {{Pedro}} and {{Felix}} Test bunch cleaning / kick out using the MBFB {{o}}
    2+2 Shutdown {{Lukas}} Linac off for welding work on racks for preparing phase 2 {{o}}
    • Priorities after shutdown
      • characterize linac
      • commission LTB
      • recover injection/timing
      • storage ring injection
      • optics/orbit with superbends
      • (we get here after 3 weeks if lucky)
      • various machine development activities
      • vacuum scrubbing at maximum / 400 mA top up 3 months to recover nominal operation parameters

Minutes written by {{Felix}}

26/11/2025

Participants: {{Michael}}, {{Simona}}, {{Volker}}, {{Lukas}}, {{Micha}}, {{Jonas}}, {{Boris}}, {{Felix}}

  1. Introduction

    • Approval of last minutes

      • All those present confirm the minutes of the last meeting.

    • Communication

      • The current machine schedule is available at https://sls.psi.ch/schedule/.
      • Please send shift requests ahead of the MDM meetings.
      • Elog
        • Please prepare your shift reports in the elog before the next MDM.
        • Any changes made to the machine (e.g., optics, orbit or machine interlock bridges) must be documented in the elog
      • Control Room Etiquette
        • Please keep voices down in the control room and go elsewhere for intense discussions.
        • Please remember to always keep the control room informed, i.e., talk to the operators before starting and after finishing your shift/maintenance/repair work
        • Spontaneous on-site shifts, e.g., over the weekend or night should be announced in advance to the control room.

  2. Reports

    • Operation by {{Felix}}

      • Summary of Machine Activities since last MDM
        • False alarms
          • power supplies short duration alarms
          • RF teststand alarms not using forcepv
          • corrector magnet alarms when FOFB is running
          • peaks on RMS orbit deviation wo reference orbit
            • still waiting for actually required fast updated peak2peak wo reference orbit pvs
        • Synchronisation of screen panel and service writing to EPICS PVs in preparation
        • Hysteresis for ISET values for magnets should be reduced to avoid errors in snapshot files or measurements
        • Refactored version of timing application successfully tested and confirmed working:
          • no bucket shifts observed
          • bucket 0 distribution relying on external trigger to master works
          • to be deployed, requires small controls update
        • very successful user operation during the last 2 weeks with ~98 % availability

    • Linac/LTB Optimization by {{Volker}}

      • Confirmation from mech. engineering: parts and supports for magnets to be ordered the coming weeks, delivery expected mid January
      • LTB upgrade should be ready end of March
      • Linac is not well setup for high charge, i.e, transmission below 50 % for high charge

    • RF by {{Lukas}}

      • Failure of SSA3 on Monday last week required rebooting of safety controller
        • MD from yesterday in discussion with Cryolettra
        • RF noise does not look so bad
        • Some noise visible from AC/DC power supplies
        • Improvements to, e.g. cabling for noise supression, possible in long shutdown

    • Pulsed Magnets by {{Martin}}

      • One incident where kicker 3 lost trigger and restart required some time
      • Emergency beam dump now has a hard wired switch in the control room which is now tested and active

    • Feedbacks and BPMs by {{Boris}}

      • issue of BPM reading reproducibility after power-cycling might now be fixed with new FW
      • Debye has issues with vertical orbit stability
        • seemingly permanent change of 90 urad since October shutdown
        • day/night drift effect not significant
        • jumping behaviour reported by beamline not confirmed by BPMs or XBPM

    • ID Feed Forward by {{Masamitsu}} and {{Simona}} and {{Dirk}}

      • Done, confirmed working

    • Shift Summaries

      • SU: collimator X09 dose investigations
        • inner ring:
        • outer ring:
        • OH X09SA:
        • overall it seems that even for these worst case scenarios the shielding is working well
        • shielding improvements indicated for Bodenkanal
      • MBFB excitation:
        • worked very well even without sweeping feature
        • lifetime varied between 5 and 30 hours
        • beam size varied between 10 and 200 um
        • analysis of data not yet done
        • tune transient at 400 mA can will be an issue and requires the sweeping feature
      • Tune shift from X11
        • BPM gain should be adjusted to beam current to avoid FOFB adding noise to tune measurement

  3. Shift Requests

    Hours Machine Contact Description Scheduled
    1 50 mA {{Cigdem}} and {{Benoit}} PCT switchover tests {{x}}
    4 400 mA {{Jonas}} and {{Cigdem}} Vertical beam size manipulation {{x}}
    4 no top up {{Jonas}} and {{Volker}} Linac optimization {{x}}
    2 400 mA {{Felix}} and {{Dirk}} Test ID interlock and Freigabe automation {{x}}
    4 400 mA {{Boris}} Test new FW that should fix power-cycle issue {{x}}
    1 0 mA {{FelixM}} Investigate collimator encoder problems {{x}}
    4 50 mA {{Simona}} Measure tune shift for X02 / U15 {{x}}
    4 0-400 mA {{Felix}} and {{Romain}} Deploy refactored timing application {{x}}
    4 400 mA {{Felix}} Establish vacuum lifetime measurement using MBFB {{x}}
    3 0 - 50 mA {{Boris}} and {{JonasP}} Test ADC peak filter {{x}}
    4 0 - 50 mA {{Boris}} Test BPM disabling feature {{x}}
    1 50 mA {{Pedro}} and {{Felix}} Test horizontal/vertical bunch-by-bunch waveform readout {{o}}
    4 50 mA {{Pedro}} and {{Felix}} Test fast excitation sweeping or broadband excitation using the MBFB {{o}}
    4 50 mA {{Pedro}} and {{Felix}} Test bunch cleaning / kick out using the MBFB {{o}}
    2+2 Shutdown {{Lukas}} Linac off for welding work on racks for preparing phase 2 {{o}}

Minutes written by {{Felix}}

05/11/2025

Participants: {{Boris}}, {{Lukas}}, {{Volker}}, {{Simona}}, {{Cigdem}}, {{Micha}}, {{Hans}}, {{Rebecca}}, {{Jesus}}, {{Martin}}, {{Romain}}, {{Felix}}

  1. Introduction

    • Approval of last minutes

      • All those present confirm the minutes of the last meeting.

    • Communication

      • The current machine schedule is available at https://sls.psi.ch/schedule/.
      • Please send shift requests ahead of the MDM meetings.
      • Elog
        • Please prepare your shift reports in the elog before the next MDM.
        • Any changes made to the machine (e.g., optics, orbit or machine interlock bridges) must be documented in the elog
      • Control Room Etiquette
        • Please keep voices down in the control room and go elsewhere for intense discussions.
        • Please remember to always keep the control room informed, i.e., talk to the operators before starting and after finishing your shift/maintenance/repair work
        • Spontaneous on-site shifts, e.g., over the weekend or night should be announced in advance to the control room.

  2. Reports

    • Operation by {{Felix}}

      • Summary of Machine Activities since last MDM
        • Beam dump kicker
        • Beam dump controller
        • PCT Rapid Current Drop Interlock
        • X02 / U15 Temperature / Vacuum / Lifetime {{ElogOP(63020)}}
          • to be taken out during long shutdown for installation of additional cooling copper and remove thermal isolators on downstream side
          • U17 will get the same design changes
          • wide band monochromator of I-Tomcat probably not too sensitive to drift of harmonics
        • Radiation measurements U15/UE36/U19 {{ElogOP(63013)}}
        • Collimator center position optimization
        • Lifetime
        • Filling Pattern Feedback
        • Escalation tests PX-I
      • Incidents/Issues
        • Cooling problem over the weekend {{ElogOP(62997)}}
          • Outage of tunnel air conditioning unit nr. 5 for arc 9 starts Sat. 3:16
          • Beam loss due to temp interlock 33 minutes later Sat. 3:49
          • Tunnel accesss for cooling piquet to exclude water leak
          • Beam limited to ~100 mA after repair of air conditioning unit
          • Issue followed by closed valve in cooling circuit of arc 9

    • Diagnostics by {{Cigdem}}

      • Shutdown work: {{ElogOP(62833)}}
      • Test of PCT rapid current Decay rate functionality: {{ElogOP(62855)}}
      • APD measurement issue for single bunches (comb-like fill pattern): {{ElogOP(63007)}}
      • Vibration investigations --> no change in either the beam size or the center-of-mass movement for many tests:
        • switched off the FE cooling water supply
        • switched off the water supply to the absorber
        • membrane pump off and on
        • FOFB off and on

    • Linac/LTB Optimization by {{Volker}}

      • LTB mechanical engineering ongoing for quadrupole exchange
      • connector plate solution found, parts should be ready mid January
      • plan is to finish by end of march

    • Storage Ring Optimization by {{Masamitsu}}

    • RF by {{Lukas}}

    • Pulsed Magnets by {{Martin}}

      • Beam Dump Kicker measurement based on scintillating fibers
        • to be permanently used for post mortem
        • nicely shows the beam dump efficiency
      • BDK amplitude to be increased to 7 kA when all switches are using encapsulated devices
      • BDC synchronisation to gap planned

    • Feedbacks and BPMs by {{Boris}}

      • FOFB after shutdown not running stable at 40 kHz
        • reduction to 20 kHz enabled running it stable
        • measurement of new response matrix enabled running at 40 kHz
      • High level FPFB now implemented thanks to single shot feature of timing system
        • FPFB HW prepared for low level delivery of buckets to timing system
        • BPMs sensitive to filling pattern due to averaging over multiple bunches and thus require constant current over bunch train
        • Interleaved filling mode best for BPM measurement stability
        • FPFB supports using APD and BPM data

    • Timing by {{Romain}}

      • Next issue found, 90 to 95 % of injections working fine
      • Next steps: clean up code (required and working fixes/features currently spread over different versions)
      • Issues mainly related to SW and HW limitations
      • revolution trigger in progress
      • sync frequency still matched to old booster revolution change injection scheme

    • ID Feed Forward by {{Masamitsu}} and {{Simona}} and {{Dirk}}

      • FF measured for all except X11 C= and 45 deg
      • all measurements implemented in EPICS
      • measurement of tuneshift from IDs show octupole term in UE36 being compared to field maps from ID group

    • Shift Summaries

      • {{Jesus}}
        • response of second order chromaticity to first and last octupoles in arc
        • measurement was not working very well due to issue with tune or chromaticity measurement
        • {{Simona}} also encountered issues with the NAFF based tune measurement

  3. Shift Requests

    Hours Machine Contact Description Scheduled
    2 0 - 400 mA {{Felix}} Operator training {{x}}
    1 Tunnel Access {{RomainG}} U15 investigation to evaluate possible cooling measures {{x}}
    0.5 Tunnel Access {{Cigdem}} Check diagnostic frontends {{x}}
    4 400 mA {{Pedro}} and {{Felix}} Establish vacuum lifetime measurement using MBFB {{o}}
    1 50 mA {{Pedro}} and {{Felix}} Test horizontal/vertical bunch-by-bunch waveform readout {{o}}
    4 0 - 30 mA {{Romain}} and {{Felix}} Timing update: cleanup and implement tested but not yet active bugfixes {{x}}
    4 0 - 30 mA {{Romain}} and {{Felix}} Timing upgrade: prepare external revolution trigger {{x}}
    3.5 50 mA {{Simona}} Measure FF table for X11 / UE36 and test optimizers {{x}}
    2 0 - 400 mA {{Lukas}} and {{Zheqiao}} Characterization measurements for SR RF with and without beam {{x}}
    4 0 - 50 mA {{Jesus}} Tune based optics measurements {{x}}
    2+2 Shutdown {{Lukas}} Linac off for welding work on racks for preparing phase 2 shutdown {{o}}
    4 0 - 50 mA {{Martin}} and {{Masamitsu}} Optimize kicker bump {{x}}
    3 0 - 50 mA {{Boris}} and {{JonasP}} Test ADC peak filter {{o}}
    4 0 - 50 mA {{Boris}} Test BPM disabling feature {{o}}
    • {{Boris}} is not available next 2 weeks
    • {{Pedro}} is available only next week

Minutes written by {{Felix}}

15/10/2025

Participants: {{Jesus}}, {{Oliver}}, {{Rebecca}}, {{Romain}}, {{Simona}}, {{Cigdem}}, {{Lukas}}, {{Michael}}, {{Felix}}

  1. Introduction

    • Approval of last minutes

      • All those present confirm the minutes of the last meeting.

    • Communication

      • As a result of the migration to gitea our website is now located at https://sls.psi.ch/
      • The current machine schedule is available at https://sls.psi.ch/schedule/.
      • Please send shift requests ahead of the MDM meetings.
      • Elog
        • Please prepare your shift reports in the elog before the next MDM.
        • Any changes made to the machine (e.g., optics, orbit or machine interlock bridges) must be documented in the elog
      • Control Room Etiquette
        • Please keep voices down in the control room and go elsewhere for intense discussions.
        • Please remember to always keep the control room informed, i.e., talk to the operators before starting and after finishing your shift/maintenance/repair work
        • Spontaneous on-site shifts, e.g., over the weekend or night should be announced in advance to the control room.

  2. Status Reports

    • Operation by {{Felix}}

      • Summary of Machine Activities since last MDM
        • Alignment strategy (indico)
          • due to limited availability of MD time, this shutdown is also the last opportunity for alignment before the phase 2 shutdown, minimize risk, thus the following tasks are planned
          • AN shifts in arc 8 to remove last teeth in horizontal corrector pattern
          • Horizontal girder alignment:
            • alignment of severely misaligned plinths in arcs 10 and 3
            • correct angle in straight 4 / ADDAMS
      • Incidents/Issues
        • Vacuum issue with X02/U15 and X11/UE36
          • meetings on indico
          • low risk strategy chosen, during this shutdown attempts will be made to improve bakeout of both IDs and maybe activate NEG of UE36
        • Many uncontrolled beam dumps

    • Booster/BRTL by {{Jonas}}

      • ABODI-SRM-6
        • booster beam nicely visible and emittance exchange / extraction visible
        • beam size larger than expected and not understood

    • RF by {{Lukas}}

      • Shutdown works with RF conditioning mode during tunnel access

    • Pulsed Magnets by {{Martin}}

      • 4the beam dump kicker stage in preparation
      • mitigation measures for possible arcing issue implemented
      • kicker 2 heatup was visible again, air cooling remains activated
      • encapsulated switches show much better performance and lower leakage current

    • Feedbacks and BPMs by {{Boris}}

      • Pollux observes less vertical resolution than SLS-1
        • possibly rumour of worse BPM performance at SLS 2.0 being created

    • Timing by {{Romain}}

      • separation of hor. and vert. pinger events will be available after shutdown
      • strategy for master / fire trigger to be clarified
      • new triggering board for Linac in preparation for phase 2 shutdown

  3. Shift Reports

    • {{Simona}}

      • Slides
      • Orbit bumps in IDs for nonlinear field mapping
        • {{ElogDEV(2570)}}
      • Feedforward tables for UE36 in X11MA
        • {{ElogDEV(2561)}}
      • Local LOCO Sector 6 with {{Masamitsu}}
        • {{ElogDEV(2567)}}
        • {{ElogDEV(2565)}}
      • Open questions
        • how much harm will the huge octupole components observed in X11/UE36 actually do, i.e.,
          • can it easily be compensated with the available octupoles
          • what is the effect without compensation
        • how do they compare to the design field maps from the ID group

    • Timing by {{Romain}} and {{Felix}}

      • {{ElogOP(62751)}}
      • processing bug of master enable fixed
      • issue with last update requiring retuning of entire injector timing understood and fixed (was offset delay for gun, i.e, tx200 delay)
      • real single shot feature now available and useful for debugging timing issues
      • double shots removed and bugs understood
      • further bugfixes and adaption of other connected systems (injection guard, top up / scrubbing tool) required to mitigate missed buckets when stopping/starting injection, i.e., during top-up or injection interlocks

    • Tune based optics measurements by {{Jesus}}

      • {{ElogDEV(2566)}}
      • Variaiton of action over BPMs could also be linked to model optics differing from actual optics, maybe use beta function from Masamitsu

    • Modified Booster RF ramps by {{Jonas}} and {{Lukas}}

      • {{ElogDEV(2564)}}
      • Plan to repeat with intermediate RF ramp waveform

    • {{Micha}} and {{Alessandro}}

      • Microwave instability check
        • {{ElogDEV(2572)}}
        • No microwave instabillity observed
        • data very nice, repeat with higher single bunch current
        • small effect at beginning might be showing self polarization of beam
      • Ion Clearing Gap
        • {{ElogDEV(2571)}}
        • No ion trapping observed, back to design gap
        • lifetime improves from 8 to 10 hours for design gap

  4. Shift Requests

    • {{Felix}}
      • Operator training
      • Timing development (1 day)
    • {{Simona}} (Tuesday, Thursday and Friday would be preferred)
      • Check FF table for X11 / UE36 (? h)
      • Tune shift measurement vs. bump amplitude around IDs (2 x 4 h)
      • Local LOCO (4 h)
    • {{Jesus}}
      • Tune based optics measurements
    • {{Cigdem}} and {{Daniel}}
      • X01DD diode tests with different fill patterns

Minutes written by {{Felix}}

24/09/2025

Participants: ..., {{Felix}}

  1. Introduction

    • Approval of last minutes

      • All those present confirm the minutes of the last meeting.

    • Communication

      • The current machine schedule is available at https://sls.psi.ch/schedule/.
      • Please send shift requests ahead of the MDM meetings.
      • Elog
        • Please prepare your shift reports in the elog before the next MDM.
        • Any changes made to the machine (e.g., optics, orbit or machine interlock bridges) must be documented in the elog
      • Control Room Etiquette
        • Please keep voices down in the control room and go elsewhere for intense discussions.
        • Please remember to always keep the control room informed, i.e., talk to the operators before starting and after finishing your shift/maintenance/repair work
        • Spontaneous on-site shifts, e.g., over the weekend or night should be announced in advance to the control room.

  2. Reports

    • Operation by {{Felix}}

      • Summary of Machine Activities since last MDM
        • Timing Upgrade
        • Vacuum Issue
          • Meeting series on indico, last meeting: https://indico.psi.ch/event/18038/
          • Small aperture, 21 mm, 2m long copper vacuum chamber upstream of X11/UE36 was removed and replaced with 40 mm chamber with additional pumping intersection
          • Machine performance from loss / lifetime perspective now acceptable, i.e., > 9 hour lifetime
          • Beam size remains increased by factor ~2, indicating remaining vacuum issue
          • SU measurements and required vacuum (5e-7 mbar over 2 meter) to explain observed gas lifetime indicate remaining issue with UE36 in X11 which also implicates undesirable localization of gas scattering losses
        • Post Mortem Diagnostics Issue
          • Due to negative measured doses on ARS09-DDRM-1530 and ARS09-DDRM-3500 the RadFET based dose distribution table is meaningless at the moment
      • Incidents/Issues
        • Reminder: Operation of the machine is becoming the main priority
          • please make sure that fulfilling the operational requirements hast the appropriate priority on your side
          • reliability / documentation / operator panels / communication of changes / integration with ALH, Snapshot and so forth should get higher priority than further improving the performance and adding more features
        • Risky beam dump Nr. 6
          • https://elog-gfa.psi.ch/SLS/62451
          • https://elog-gfa.psi.ch/SLS+RF/2121
          • Happened during BPM Sector reboot
          • Beam dump controller only triggered by RF stations
          • Post mortem data clearly shows that beam was lost before dump kicker was fired
          • Communication issue between machine experts concerning disabling the orbit deviation beam dump seems irrelevant
          • It would be good if the disabling and reenabling of the orbit deviation beam dump for sector reboots could be automized in a safe way
        • Upcoming migration to gitea
          • the migration is scheduled for the end of November, i.e., right in the middle of the first real SLS 2.0 user operation
          • controls has announced one day of service interruption and warned that they will be completely busy preparing and performing migration until then
          • any gitlab CI/CD has to be manually rewritten in order to work with gitea
          • Changed repository naming, hierarchy, structure and AD integration to be taken into account
        • Console issue today
          • a significant fraction of the consoles in the control room spontaneously rebooted this morning around 6 thus stopping any local feedback loops and destroying any locally recorded data
          • the same is observed on many beamline consoles
      • Operation Schedule
        • Operation until October shutdown without further interventions following DUO schedule https://duo.psi.ch/duo/public_calendar.php
        • Machine development / scrubbung until 13:00 today
        • First light for SIM today from 13-17:00
        • First light for I-TOMCAT tomorrow and Friday from 8-17:00
        • Beamline development from today until October shutdown
        • Machine development next Tuesday and Tuesday until Friday morning the week after

    • Linac/LTB Optimization by {{Volker}}

      • LTB modelling with new magnets in preparation
      • time constraints imply doing minimum, i.e.,
        • elements behind linac not touched
        • only QA, QE and QB and coresponding beam pipes are changed
        • screen monitors stay
        • BPM behind QC exchanged
        • Statement from Boris: old stripline BPMs are fine --> only dispersive BPM updatet
      • schedule is tight
      • unclear if keeping LTB upgrade project separate or increase direct coordination with linac upgrade is preferred
        • coordination can only be expected on machine expert side
        • max is coordinating resources
        • should be increased

    • Storage Ring Optimization by {{Masamitsu}}

      • Optics corrected and confirmed after shutdown
      • Cycling procedure from controls / Uros now working fine including ID correctors
      • BRTL should not be cycled with stored beam
      • Monitoring magnet designed for no field on beam will be installed downstream of collimator for quantification of expected demagnetization. Here we expect ~10x higher losses. With periodic measurement of this magnet we can predict demagnetization of the other magnets.
      • recabling of 2 sextupoles for individual control planned for shutdown

    • RF by {{Lukas}}

      • Linac
        • Linac timing issue with gun triggered at half rate to be investigated

    • Pulsed Magnets by {{Martin}}

      • For the BD pulser - we have one new switch (already with the encapsulated thyristors – we got them couple of days ago) that is ready for a replacement in case of problems.
      • By the way the initial tests show the encapsulated switches don’t have this nasty leakage current behavior and work very well. We plan to replace all switched of the BD in the near future and hope this to solve the problem for good.
      • For thin septum – we have a replacement switch in the reserve cabinet in our storage area (Sladana is aware) in case of failure.
      • No reserve replacements for all systems available yet
      • Installation and test of fast kicker in oCtober shutdown is prepared but collides with ID removal scenario, i.e., only one of the two can be done

    • Diagnostics by {{Cigdem}}

      • IBIC presentation: 10.18429/JACoW-IBIC2025-MOCI01
      • RadFET and BLM issues
      • Booster PCT not yet reference calibrated since FW upgrade
      • Implications of timing upgrade not clear
      • It would be good to have more than one diagnostic expert dedicated to SLS

    • Feedbacks and BPMs by {{Boris}}

      • IBIC presentation: 10.18429/JACoW-IBIC2025-MOPMO04
      • Felix: Focus should be shifted to operation as soon as order for new Gen2 is prepared, i.e., :
        • reliability
        • safe rebooting / recovery procedure
        • operation with missing BPM / Correctors
        • post mortem data

    • ID Feed Forward by {{Masamitsu}} and {{Simona}} and {{Dirk}}

      • see elog entry SLS Dev Log 2557
      • X02 / U15 is measured and data given to Dirk
      • X11 / UE36 needs to be done

    • Shift Summaries {Jesus}

      • Measured 2nd order chromaticity response for octupole families
        • linear correlation confirmed but not exactly matching model prediction
      • ADTS measurements also taken but ot yet analyzed
        • Masamitsu expects negative, horizontal ADTS

Minutes written by {{Felix}}

10/09/2025

  1. Introduction

    • Approval of last minutes

      • All those present confirm the minutes of the last meeting.

    • Communication

      • The current machine schedule is available at https://sls.psi.ch/schedule/.
      • Please send shift requests ahead of the MDM meetings.
      • Elog
        • Please prepare your shift reports in the elog before the next MDM.
        • Any changes made to the machine (e.g., optics, orbit or machine interlock bridges) must be documented in the elog
      • Control Room Etiquette
        • Please keep voices down in the control room and go elsewhere for intense discussions.
        • Please remember to always keep the control room informed, i.e., talk to the operators before starting and after finishing your shift/maintenance/repair work
        • Spontaneous on-site shifts, e.g., over the weekend or night should be announced in advance to the control room.

  2. Reports

    • Operation by {{Felix}}

      • Summary of Machine Activities since last MDM
        • Reestablish Orbit
        • Beam Dump Kicker
        • Scrubbing
        • Lifetime and loss limitation
      • Beamlines
        • Only ADDAMS needed 10 urad additional hor. angle after shutdown

    • Linac/LTB Optimization by {{Volker}}

      • Running fine after shutdown
      • Running with old pulser
        • New pulser was providing shorter bunches but only at lower charge
      • No plan for cathode exchange, got no funding in CAS workshop
        • spare old cathodes are available

    • Booster/BRTL Optimization by {{Jonas}}

      • Running fine after shutdown
      • Transmission into booster
      • PCT needs calibration with external reference signal after FW upgrade to enable 3.125 Hz measurement synced to ring PCT
      • BRTL transmission good

    • Storage Ring Optimization by {{Masamitsu}}

      • Reestablished orbit
        • TbT BPM data was required for this
        • One BPM in X11 was moved by 900 um (change of BBA offset)
        • Now we have 2 BPMs with huge BBA offsets (also BPM after thin septum)
      • Many magnets moved during shutdown
        • AN magnets in sectors 4 and 5 successfully shifted to get rid of highly excited hor. correctors
      • BBA, LOCO, Touschek lifetime optimized

    • RF by {{Lukas}}

      • New booster RF ramp not yet tested
      • 30 mA is threshold for automatic ramp up procedure with beam loss (max limit is 50 mA)
      • beam loss at 300 mA will give higher risk of interlocks since optimized for 400 mA
      • Failure of Master Oscillator requiring reboot of the master oscillator
        • Trickle down effect was quite large it took almost a day to recover
        • Rohde Schwarz recommended driver update for USB interface communication

    • Pulsed Magnets by {{Martin}}

      • Alignment of storage ring kicker chambers was improved during shutdown
        • roll of chambers is present
        • attempt to better align the coils was successful
        • now have complete 3d model of magnets and water bubble leveling no longer necessary and laser trackers more precise and easier to use
        • TbT data confirms reduced vertical excitation of the beam due to the 4 kicker bump
      • Kicker 2 heating issue
        • kicker 2 was dismantled and x-rayed
        • investigation went well but not conclusive
        • root cause not understood
        • elevated temperature still present, water cooling to be connected in future
      • When vacuum in injection straight is broken the next time it would be nice to correct the position of the ceramic chambers themselves
      • Beam dump kicker
        • new magnets and pulser cabinett successfuly installed
        • tests showed worse distribution for 4 stage dump kicker
        • increasing the current led to damage of on switch
        • now running with 3 stages at reduced current, optimized for good deflection, i.e., running at lower current
        • in future we will be using the encapsulated switches hoping for improved reliability

    • Impedances and MBFB kickers by {{Micha}}

      • suprised that we have no fast ion instabilities with huge pressure bump in X11
      • might be worse at 300 mA if the beam size is less blown up

    • Timing by {{Romain}}

      • Bucket shift in local mode due to software issue
        • investigating gun trigger board
      • FPFB with pedro
        • achieved open loop
        • timing and FPFB communication working
        • more beam tests required
      • Parallel work with Boris might not be possible any longer
      • Lukas has noticed alarms on many EVR IOCs, Romain will take a look

    • ID Feed Forward by {{Masamitsu}} and {{Simona}} and {{Dirk}}

      • Measurements for X02 and X11 need to be done

Minutes written by {{Felix}}

27/08/2025

Participants: {{Martin}}, {{Jonas}}, {{Jesus}}, {{Michael}}, {{Boris}}, {{Micha}}, {{Lukas}}, {{Masamitsu}}, {{Felix}}

  1. Introduction

    • Approval of last minutes

      • All those present confirm the minutes of the last meeting (BDM).

    • Communication

      • The current machine schedule is available at https://sls.psi.ch/schedule/.
      • Please send shift requests ahead of the MDM meetings.
      • Elog
        • Please prepare your shift reports in the before the next MDM.
        • Changes made to the machine (e.g., optics, orbit or machine interlock bridges) must be documented
      • Control Room Etiquette
        • Please keep voices down in the control room and go elsewhere for intense discussions.
        • Please remember to always keep the control room informed, i.e., talk to the operators before starting and after finishing your shift/maintenance/repair work
        • Spontaneous on-site shifts, e.g., over the weekend or night should be announced in advance to the control room.

  2. Reports

    • Operation by {{Felix}}

      • Summary of Machine Activities since last BDM
        • Machine Development Shifts
          • Successful reduction of corrector current in arc 6 after moving 2 AN magnets elog
          • Successful BRTL optics measurement and matching optimization followed by injection optimization achieving stable 98% efficiency for multiple minutes elog
        • Shutdown
          • Possibly inconclusive X-ray of kicker 2, i.e., next steps to be defined
          • Final beam dump kicker setup installed with 4 active stages
          • Doublet/Triplet realignments in straights 3, 9, 11,
          • 5th Triplet realignment arc 12
          • horizontal realignment of arc 5 elog
        • Incidents/Issues
          • Beam dump kicker repair on Tuesday, 05.08.2025
          • Beam dump kicker emergency repair on Thursday, 07.08.2025
          • Risky beam dump nr. 5
        • Interlock Beam Dumps from > 25 mA
          • 21 from > 25 mA

    • Booster/BRTL Optimization by {{Jonas}}

      • BRTL Optimization
        • Quad scan based optimization of BRTL optics for better matching from booster to storage ring
        • After additional optimization of injection elements and corrector magnets ~100 % injection efficiency was achieved
        • Using simplex optimizer Ocelot to optimize the vertical trajectory in the BRTL stable 97-98 % injection was achieved
        • Strategy of reducing injection magnet excitations to improve thermal stability was followed
        • Non-zero dispersion at BRTL quadscan screen confirmed (order 50 to 100 mm)
          • optimizing initial dispersion in BRTL by adjusting booster optics difficult
          • installing longer quad in BRTL instead of short one could solve the issue (30 % additional strength required)

    • Storage Ring Optimization by {{Masamitsu}}

      • Local LOCO study
        • OFB left running except for one local area where optics are measured and corrected
        • confirmed bad horizontal phase advance of almost exactly 2 pi from first to last BPM in sector 6
        • simulations confirm the observations

    • RF by {{Lukas}}

      • Feature of switching to internal triggering when losing event stream from timing master is now enabled for SR ring
        • For booster/linac this feature will take more time
      • Linac tests for new pulser board (optimized version of new) providing shorter pulses ongoing this week
        • Question: leave in or switch back decision when?
        • Friday, 1 hour required for switching between different pulser boards
      • Synchrotron oscillations
        • Observed between 350 to 380 mA, seems also to be influenced by filling pattern
        • Request to provide switch to disable/change LLRF feedback loops to enable confirming source of synchrotron oscillation excitation
        • Long term solution for RF group would be to get input signal from MBFB and incorparate this in their own feedback loops
        • LLRF now at lowest limit of LLRF regulation loop

    • Pulsed Magnets by {{Martin}}

      • Beam Dump Kicker Switch failures
        • Seem not to be radiation related but more to the insulation technique used
        • Improvement by switching to packaged version of the switches
        • Delivery time might be long due to export controls
      • Beam Dump Kicker Final system
        • installation ongoing, pulser foreseen to be installed on Friday
        • beam dump health monitoring device including A/C monitoring
        • percentage of last kick delivered available
      • Pinger power supplies exchanged to unify for easier maintenance and controls integration
      • Role of kicker 1 to 4
        • Kickers disassembled and ceramic chambers measured by alignment group and confirmed to be rolled
        • Correction requires venting injection straight
        • Switch alignment system of kickers from water bubble to laser tracker
      • Heating issue of kicker 2
        • No obvious cause identified so far (temperature sensors, thermal imaging, x-ray)
        • Possible strategy 1: run until it breaks, possibly improve cooling
        • Possible strategy 2: switch to spare chamber (not yet prepared)
      • Further Issue with RF console in pulsed magnets rack
        • caused by high traffic from panels
        • update rate of waveforms reduced from 10 to 1 Hz
      • Software update of pulsed magnets control system
        • clean up, should have no effects

    • Impedances and MBFB kickers by {{Micha}}

      • Systematic dependence of measured bunch length on position in filling pattern correlates with simulations

    • Feedbacks and BPMs by {{Boris}}

      • FPFB
        • before shutdown event master software was iterating successfully over list of buckets from FPFB
        • some bugs for first and last buckets in list still persist
      • MBFB
        • transverse was running and is in principle ready for use
        • horizontal needs to be gated to not run during injection
      • OFB
        • preliminary version enables synchronization with BPMs but not providing much improvement since latency mainly defined by BPM readout
        • next steps: make readout faster, solve load/performance issues on SW/FW side
        • improved version of driver with less unnecessary copying of waveforms not yet working
      • BPMS
        • BRTL BPMs scaling factors were wrong and are now corrected for all except last button type BPM which has unknown geometry design
        • For one BPM in ring the attenuation of 1 cable dropped suddenly by 2 dB over night at 2 AM, cable being exchanged during shutdown
        • extremely annoying bug in FW being prioritized: digital bypass filters lead to variations of upto 20% after reboot
        • New FW to be tested next week
      • Thermal beam pipe movements
        • simulations predicted BPM movements upto 10 um
        • recent measurements indicate movements upto 30 um for one BPM
        • simulation including latest design changes confirms these measurements
        • this is likely the cause for the orbit motion without OFB
        • repeated simulation of forces on pipe gives forces exceeding inelastic deformation limits, can be improved by increasing waterflow by factor of 2 and switch series connections of cooling pipes to parallel
        • waterflow now close to corrosion limits for copper over 20 years (10-20 %)
        • quickfix intended to be implemented until next Monday (maybe 1 sector)

    • Shift Summaries

      • ...

  3. Shift Requests

    • KW36 after shutdown
      • 2h, Machine startup ({{Felix}})
      • 2h, Reestablish orbit ({{Masamitsu}})
      • 4h, Beam dump kicker tests ({{Martin}} and {{Felix}})
      • 12h, AN alignment to reduce horizontal corrector excitation ({{Masamitsu}} and {{Karsten}})
      • 8h, FOFB FW/SW Upgrade {{Goran}}
      • 4-8h Event Master / FPFB ({{Romain}} and {{Pedro}})
      • 4h Mi oder Do, BPM FW/SW Upgrade ({{JonasP}} and {{Boris}})
      • Operator training ({{Felix}})
      • 8 hours, Booster RF-ramp tests ({{Lukas}} and {{Jonas}})
      • 3 hours, bunch length measurements, stable 400mA ({{Cigdem}} and {{Daniel}})
      • 4 hours, ADTS measurements, night ok ({{Jesus}})
      • 4 hours, Update the base timing delays in the injection chain from us to ticks {{Romain}}
    • KW37
      • Tuesday, 09.09.2025, 07:00 - 09:00, Operator training {{Felix}}
    • KW38
      • [] Monday, 15.09.2025, 07:00 - 09:00, Operator training {{Felix}}
      • [] Monday, 15.09.2025, 09:00 - 10:00, LOCO sector 6 {{Masamitsu}} and {{Simona}}

Minutes written by {{Felix}}

20/12/2023

Participants: {{Felix}}, {{Michael}}, {{Anuschka}}, {{Jonas}}, {{Cigdem}}, {{Lukas}}, {{Volker}}, {{Jeff}}, {{Micha}}, {{Martin}}, {{Romain}}, {{Simona}}

Indico: link

  1. Introduction

    • Approval of last minutes
      • The minutes of the last MDM are approved.

  2. Reports

    • Machine Operation by {{Felix}}

    • BD Collaboration SLS & BESSY II by {{Jonas}} and {{Felix}}

      • Seminar talk on Injection by Peter Kuske: slides
      • Seminar talk on the BESSY III Lattice by Paul Goslawski: slides
      • Brief introduction of emittance sharing with damping dominated coupling - the main topic of collaboration slides

    • Beam Size Minimization Measurements by {{Cigdem}} and {{Michael}}

    • Optimizing the Beam Size to Lifetime Ratio by {{Cigdem}} and {{Simona}}

      • Too many problems with the machine so was unable to carry out measurements

    • Test Spare PCT Hardware by {{Cigdem}}

      • PCT amplifier in tunnel was exchanged with a spare. Previous noise on readings seemed to be comparable to the that of PCT2 . Will use the spare electronics at SLS 2.0.

    • SLS 2.0 Injection Chain Setup for 2.7 GeV by {{Jonas}} and {{Tom}}

      • Link to ELOG
      • Linac and booster RF frequencies were successfully set to SLS 2.0 values.
      • All booster ramps were scaled to achieve 2.7 GeV and extraction of the beam
      • No great improvement to the injection into the booster was seen: still around ~50% or less as for the normal 2.4 GeV + SLS 1.0 RF freq. case
      • Emittance exchange was introduced and seems to be working. Can be optimized during booster commissioning
      • Snapshots saved:
        • ALBMA_20230927_2004.snap
        • ABOMA_20230927_1940.snap
      • The booster looks ready for SLS 2.0!  
      • (cross fingers that nothing will stop working during darktime and recabling...)

    • Test of SLS 2.0 MBFB and FPFB by {{Boris}} and {{Pedro}}

    • Software Development for Emittance Measurement by {{Jan}}

    • Software Development for BPM TbT Data by {{Jan}}

    • Storage Ring Kicker Matching by {{Chris}}, {{Jonas}} and {{Martin}}

      • added trim coil to k3 to simulate eddy currents in chamber metallization
        • disappointing result : transient remained on the same order as without trim coils
      • comment from Martin: despite many efforts never really found out root cause of observed transient,
        • only observed effect: increasing kick length reduced amplitude of disturbance suggesting this effect to be related to the derivative of the pulses, i.e., difference in metallization of chambers
        • especially the observed vertical oscillations are not well understood
        • maybe return to investigation of this issue ater commisssioning of SLS 2.0
        • nevertheless, transparency of injection bump world leading at SLS

    • Machine Learning for SLS 2.0 by {{Simona}}

    • Test New SLS2 FOFB by {{Boris}} and {{Goran}}

      • (remarks from {{Michael}})
        • quite successful, obvious bugs were found and could be fixed in
        • the end
          • validity of inverted response matrices could be shown
          • normal orbit correction including dispersion exclusion from the orbit feedback to inhibit OFB correcting dispersive orbits was working very well, i.e., no accumulation of mean horizontal kick correction
          • dispersion correction via masterclock at much lower speed than corrector magnets

    • Robinson stability measurements at lower current (with streak-cam) by {{Lukas}} and {{Michael}}

      • A more detailed report is available on SLS RF ELOG
      • Previous measurements were done at 100mA. This time, the stored current was 40mA, where simulations predict two instability zones. 
      • For measurements, we had a homogenous fill, without gap. The detuning of the Super-3HC was reduced until the beam was lost.
      • Findings:
        • It was possible to measure Dipole- and Quadropole Oscillations
        • The instability threshold was found around the expected detuning from Elegant simulation.
        • Looks like the instability appears near sextupole oscillation around detuning frequency of the Super-3HC.
        • Measured bunch length was near expected value, near instability, a smaller bunch length was measured.

    • Investigation Super-3HC Failure and Impedance of nearby Vacuum-components by {{Lukas}}

      • More detailed reports are available on the SLS RF ELOG: 1821 and 1822
      • In this shift, an attempt was made to investigate wake-field effects around the Super-3HC, by driving horizontal and vertical bumps at 400mA. The goal was to check, if the potential damage of the Super-3HC in March 2022 migth be related to excitation of transverse Higher Order Modes around the tapers, bellows, absorbers and pumps near the Super-3HC.
      • Findings:
        • No significant correlation of bump to temperatures, HOM-PU signals and 3HC Voltage was found.
        • Later, beginning of dark-time, the vacuum components in front and after the Super-3HC was inspected. It was found that an rf-finger was welded on at the bellow and bent and also some traces found on the absorber in front of the cavity. The absorber and taper will be inspected around January 2024.
        • The damage is most likely related to Synchrotron Light hitting on the rf-fingers and the absorbers.
        • The welded rf-finger caused a fix connection in the bellow and led to additional force and deformation of the Super-3HC cavities during thermal drifts and expansion of the Arc vacuum chamber.

    • Test on influence of ELM brake for servo motor on the stored beam with and without FOFB by {{Thomas}} and {{Marc}}

    • Test the booster inj/ext with the upgraded timing system and fine delay feature, tests on the timing master software with beam by {{Romain}}

    • High power tests of coupler and power transition in the teststand by {{Lukas}}

      • More details are available in the SAT-report on Alfresco: https://i.psi.ch/2zN.
      • In short:
        • It was possible to condition the cavity up to 600kV, just before start of the dark-time. This would be sufficient for 3-cavity operation, at reduced current, in SLS2.
        • Unfortunately, break-down rate measurements were not possible because of the limited testing time.
        • Tests with more than 55kW input power were postponed to the next high power test slot, after April 2024.
        • Above 35kW, there were bright spots visible on the coupler camera (see below).
        • Many thanks for the great support from the control-room during the cavity conditioning period!

  3. AOB

    • Resurrection of the UOM

      • The User Operation Meeting (UOM) will be used to coordinate the beamline beam commissioning activities between the beamline and machine experts.

    • Next MDM

      • The MDM will restart with the (re)commissioning activities for the LINAC

20/09/2023

Participants: {{Felix}}, {{Simona}}, {{Michael}}, {{Chris}}, {{Jonas}}, {{Tom}}, {{Andreas}}, {{Anuschka}}, {{Volker}}, {{Lukas}}, {{Jeff}}

Indico: link

  1. Reports

    • Machine Operation

      • This year was the worst year in the history of SLS operation. With 92% it was worse than first year with 94 %. With 99.6% Availability in the last weeks without major outages. Beamlosses partly occured due to beamlines

    • Electron source pulser tests

      • second pulse from new board amended
      • pulse length shorter at lower charge ~100 pC
      • was in operation the last weeks
      • observed energy stability seems to have more jitter than old pulser --> diagnosed to be problem of modulator
      • board measured to feature jitter of ~12ps compared to old one with ~20ps
      • injection rate to booster rather low

    • Debye commissioning

      • measured entire night with -1.3 mm bump @ 85 mA
      • very useful for debugging beamline
      • photo of monochromatic photon beam at end of beamline
      • Problem with old frontend of IR beamline
      • mirror moved and probably tilted
      • large orbit bump and low current required to mitigate vacuum interlocks
      • party today

    • Beam size optimization

      • short unsatisfying shift
      • wrong file loaded in shift before
      • corrected in this shift --> got below 10 um

    • Test of new FOFB

      • bug identified (corrector matrix transposed accidentally)
      • seems to work well now

    • Linac radiation mapping

      • measured radiation dose, waiting for report
      • measured dose rates higher than old measurements with multibunch mode
      • measurements were performed at higher charge than required for operation

    • Single bunch measurements

      • results in RF elog
      • measured zero current bunch length seems to fit prediction within 1%
      • microwave instability confirmed at 3.4 mA somewhat smaller than model (4 mA) maybe due to missing impedance

    • ID and orbit

      • code to compensate for undulator gap change kick was tested
      • working code
      • output pdf in elog
      • local correction with 4 correctors
      • QT GUI not yet working on Bay 4
      • next time with only local correctors
      • took response matrix data 150 samples for machine learning model

    • X04SA-ID orbit optimization

      • Goal was to callibrate new SiC XBPMs in X04 and compare to existing frontend XBPMs at X04 and X11
      • beamline was operated during MD
      • shift time was short and current reduced for Debye SU measurements
      • X11 nobody was available to help

    • BPM tild measurement

      • last bpm rotation measurement long ago, lots of HW exchange since then
      • tilt error lets horizontal dispersion appear vertical, making vertical dispersion suppression difficult
      • shift was successful

    • Operator training

      • 5 participants, well recieved
      • explained LINAC setup including different bunchers SME and longitudinal loss monitors with persistent mode showing minimum, maximum, current and average loss
      • worked nicely
      • LLM give nice unique signature of current state of injection losses
      • good to identify drifts and problems early
      • more power in subharmonic prebuncher (SPB) would be good (stronger gradient enables shorter bunch which is good for further bunching and acceleration in 3 GHz structures)
      • idea is to give operators tools/cookbook to double check setup from RF group and correct for long term drifts

  2. Requests

    Time
    		 Description
    Participants
    Monday, 25.09.2023 {: colspan=3} &#8288 {: style="padding:0"} &#8288 {: style="padding:0"}
    10:00 - 14:00 Test of SLS 2.0 MBFB and FPFB {{Pedro}}, {{Boris}}
    14:00 - 18:00 Test New SLS2 FOFB {{Goran}}, {{Boris}}
    18:00 - 24:00 Machine Learning for SLS 2.0: Train Model {{Simona}}
    Tuesday, 26.09.2023 {: colspan=3} &#8288 {: style="padding:0"} &#8288 {: style="padding:0"}
    00:00 - 07:00 Reserve
    07:00 - 18:00 BD Collaboration, Coupling / Round Beam {{Jonas}}, {{Felix}}, {{Cigdem}}, Paul Goslawski, Peter Kuske
    18:00 - 22:00 Investigation of the Super-3HC failure and impedance of the vacuum-components {{Lukas}}, Operator
    22:00 - 24:00 BD Collaboration, TRIBs and Coupling / Round Beam {{Jonas}}, {{Felix}}, {{Cigdem}}, Paul Goslawski, Peter Kuske
    Wednesday, 27.09.2023 {: colspan=3} &#8288 {: style="padding:0"} &#8288 {: style="padding:0"}
    00:00 - 07:00 BD Collaboration, TRIBs and Coupling / Round Beam {{Jonas}}, {{Felix}}, {{Cigdem}}, Paul Goslawski, Peter Kuske
    07:00 - 14:00 Robinson stability measurements at lower current (with streak-cam) {{Lukas}}
    14:00 - 20:00 SLS 2.0 Injection Chain Setup for 2.7 GeV {{Jonas}}, {{Tom}}
    20:00 - 24:00 {: rowspan=2} 50 mA Storage Ring Kicker Matching {{Chris}}, {{Martin}}, {{Jonas}}
    Software Development for BPM TbT Data {{Jan}} &#8288 {: style="padding:0"}
    Thursday, 28.09.2023 {: colspan=3} &#8288 {: style="padding:0"} &#8288 {: style="padding:0"}
    00:00 - 02:00 Test on influence of ELM brake for servo motor on the stored beam with and without FOFB {{Thomas}}, {{Marc}}
    02:00 - 06:00 Reserve
    06:00 - 07:00 Test the booster inj/ext with the upgraded timing system and fine delay feature, tests on the timing master software with beam Alexander, {{Romain}}
    08:00 - 12:00 Machine Learning for SLS 2.0: Test Model {{Simona}}
    12:00 - 14:00 Optimizing the Beam Size to Lifetime Ratio {{Cigdem}}, {{Simona}}
    14:00 - 22:00 Beam Size Minimization Measurements {{Michael}}, {{Cigdem}}
    22:00 - 24:00 Reserve
    Friday, 29.09.2023 {: colspan=3} &#8288 {: style="padding:0"} &#8288 {: style="padding:0"}
    00:00 - 06:00 Reserve
    06:00 - 07:00 Test the booster inj/ext with the upgraded timing system and fine delay feature, tests on the timing master software with beam Alexander, {{Romain}}
    07:00 - 11:00 {: rowspan=2} Test New SLS2 FOFB {{Goran}}, {{Boris}}
    Software Development for Emittance Measurement {{Jan}} &#8288 {: style="padding:0"}
    11:00 - 15:00 Test of SLS 2.0 MBFB and FPFB {{Pedro}}, {{Boris}}
    15:00 - 15:30 Test Spare PCT Hardware {{Cigdem}}
    15:30 - 19:30 Optimizing the Beam Size to Lifetime Ratio {{Cigdem}}, {{Simona}}
    19:30 - 24:00 Reserve
    Saturday, 30.09.2023 {: colspan=3} &#8288 {: style="padding:0"} &#8288 {: style="padding:0"}
    00:00 - 07:30 Reserve
    07:30 - 08:00 Ceremonial Beam Dump GFA
    In parallel, 25. - 30.09.2023 {: colspan=3} &#8288 {: style="padding:0"} &#8288 {: style="padding:0"}
    High power tests of coupler and power transition in the teststand (should not affect operation) {{Lukas}}, {{Roger}}

  3. AOB

    • Communication Strategy and Plan for SLS 2.0

      • At the last SRDG meeting (https://indico.psi.ch/event/15040/) the new SLS 2.0 communication strategy was mentioned. Here some example tweets:

        ??? quote "SLS 2.0 related tweets posted by the official PSI twitter/X account @psich_en" Image1{ align=left } Image2{ align=left } Image3{ align=left } Image4{ align=left } Image5{ align=left } Image6{ align=left }

      • All those present at this meeting agree that it is not a good idea to rename the well known name "SLS 2.0" which stands for it being the successor to the existing SLS back to the name of its predecessor after commissioning.

    • End of SLS Party (PSD)

      • Monday, 25th September, 16:00 - 18:00
      • Place: tent at the SLS (when facing the SLS entrance, the tent is located on the left hand side)
      • Please register by Monday, 18th September 2023 in https://indico.psi.ch/e/SLS-party

    • SLS Letztes Elektron vor dem Upgrade Z'Morge (GFA)

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