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@@ -116,7 +116,7 @@ Minutes written by {{Felix}}
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## 05/08/2026
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**Participants:**
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..., {{Felix}}
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{{Lukas}}, {{Jonas}}, {{Rebecca}}, {{Micha}}, {{Cigdem}}, {{Masamitsu}}, {{Paolo}}, {{Simona}}, Marco, {{Alessandro}}, {{Masamitsu}}, {{Boris}}, {{Felix}}
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1. **Introduction**
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@@ -155,59 +155,103 @@ Minutes written by {{Felix}}
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* Visitors from Diamond ({{Volker}})
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* Zoom am Freitag mit Linac Experten von Diamond (Neven ist vor Ort)
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* Maschinenschicht Linac am Samstag, 15 August, ca. 9 bis 14 Uhr
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* Startup of SLS and HIPA has Priority over SwissFEL next week
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* **Linac/LTB Optimization** by {{Volker}}
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* ...
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* **Linac/LTB Optimization** by {{Lukas}}
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* Startup on Friday
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* **Booster/BRTL Optimization** by {{Jonas}}
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* ...
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* **Storage Ring Optimization** by {{Masamitsu}}
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* ...
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* Michael prepares corrector corrections for startup with data from Karsten expected on Thursday
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* **RF** by {{Lukas}}
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* **Linac**
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* **Booster**
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* Tests starting tomorrow (modifications on control and interlock system)
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* **Storage Ring Main RF**
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* Tests starting Friday (tunnel sector not yet available)
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* Failures of ECMC servers due to network
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* Failure of SSA safety controller
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* Tests of spare parts
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* Restart to nominal conditions in time should be feasible
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* **Super-3HC**
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* cold
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* tuning tomorrow
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* **Pulsed Magnets** by {{Martin}}
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* ...
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* work ongoing for protective covers installation in tunnel
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* **Impedances and MBFB kickers** by {{Micha}}
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* ...
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* fast ion instabilities to be expected for startup
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* recommendation: multiple gaps, e.g., 2 equally distributed 30 bucket gaps, {{Alessandro}} needs to check 3HC
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* **Diagnostics** by {{Cigdem}}
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* ...
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* ICT in LTB has been replaced
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* Karsten checked if BPM remains aligned, small error with respect to documented value from 2017 identified and corrected
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* PCTs
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* Old 125 MHz ADC system now off and to be removed, only new crates with 1 Mhz ADC running
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* Waldemar took over FW, back on 10th
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* Connection to BDC not yet available/tested, i.e., should be bridged for startup
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* Interface to RF is there on same fiber connection, should be order of magnitude less noisy
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* Main current PVs remain unchanged
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* All BLMs now replaced with light tight cable jacket
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* **Feedbacks and BPMs** by {{Boris}}
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* ...
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* **Timing** by {{Romain}}
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* ...
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* New X-Ray BPM optimized for fast RF response tested with DBPM3 electronics succesfully with 12 keV photons
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* 100 nm noise
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* beam spectrum agrees well with RF-BPM connected to same electronics
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* to be installed permanently in straight X04 for further tests parasitically during beamline commissioning
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* Working on improving CBI detection
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* RFSoC with 1 interleaved channel now replaced with using all 8 channels enabling direct sampling
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* currently 8 turns, next step: 100 ms of post mortem raw data
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* next step: remove i-tech frontends and use raw beam data
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* **ID Feed Forward** by {{Masamitsu}} and {{Simona}} and {{Dirk}}
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* ...
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* data for setting up optics FF is taken, HLA is prepared
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* New FF tables to be measured
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* X09LA U70
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* X06 U17
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* ID corrector magnets should be ready
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* clear for X06
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* for X09 Marco will double check
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* **Radiation Protection** by {{Rebecca}}
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* PX-I needs new first light shift for new U17 ID as if never had permit
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* Also First Light: XIL (still waiting for answer from BAG), OPTICS
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* **Shift Summaries**
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*
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* X07 UE38 decoupling using only local skew quadrupoles {{Jonas}}
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* UE38 is assumed to be thin skew quad and model based the setpoint for matchinng quads is derived
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* open gap LT 4.4 h, closed gap 3.6h, closed with compensation 4.0 h
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* impact on beam size also well compensated
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* TbT data as function of beam current for standard filling pattern {{Jonas}}
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* decoherence changes a lot
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* RF group confirms that the impedance and 3HC are both expected to contribute to changing decoherence
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* Single bunch measurements {{Alessandro}}
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* scanned current and main RF voltage vs bunch length and arrival time, estimating MC,
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* RF-LOGs 2293 2294
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* more data and measurements required for final results
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* generally larger values than design observed, too early for numbers
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* Test of new corrector magnet FW on one magnet {{Boris}}
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* 10 kHz more signal BW for correctors
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* PID replaced by model based FF (requires individual calibration for each power supply)
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* Next test: roll out FW to multiple corrector magnets, maybe all correctors next shutdown
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3. **Shift Requests**
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| **Time** | **Description** | **Who** |
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| :------- | :------------------------------------------------------ | :------------------------------------------- |
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| 2 hours | Operator Training | {{Felix}} |
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| 8-10h | Operator Training | {{Felix}} |
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| 4 hours | Operator Startup | {{Felix}} |
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| 2 hours | Investigate tune feeedback drift | {{Masamitsu}}, {{Felix}} |
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| 2 hours | Investigate injection drifts | {{Martin}}, {{Felix}} |
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| 4 hours | implement ID Optics Feed Forward | {{Masamitsu}}, {{Felix}} |
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| 3 hours | test cooling PLC upgrade | {{Lukas}} |
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| 4 hours | check movable power dividers of linac with beam (Felix calls Paolo as soon as startup is done) | {{Fabio}}, {{Paolo}} |
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| 8 hours | test timing | {{Romain}}, {{Felix}} |
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| 4 hours | check movable power dividers of linac with beam | {{Fabio}}, {{Paolo}} |
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| 2 hours | Investigate tune feeedback drift | {{Masamitsu}}, {{Felix}} |
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| 4 hours | implement ID Optics Feed Forward | {{Masamitsu}}, {{Felix}} |
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| 2 hours | measure feed forward X06 U17 (not wednesday evening) | {{Simona}} |
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| 8 hours | thorough linac setup | {{Volker}}, {{Felix}}, Neven |
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| 10-17h | 14.8. for BPM firmware upgrade (trying to fix the FOFB fiber link issue as needed to get a fast orbit interlock) | {{Boris}}, {{JonasP}} |
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| 11-22h | 25.8. test of new ring corrector power supply firmware ({{HansJ}} has time from 11-22h), as needed to reach > 1 kHz FOFB 0dB point and better suppress 50 and 90 Hz perturbations & improve general FOFB stability. | {{Boris}}, {{HansJ}} |
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| 13-17h | 14.8., 4 hours, for BPM firmware upgrade (trying to fix the FOFB fiber link issue as needed to get a fast orbit interlock) | {{Boris}}, {{JonasP}} |
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| 13-16h | 25.8. test cooling PLC upgrade | {{Lukas}} |
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| 16-22h | 25.8., 6 hours, test of new ring corrector power supply firmware ({{HansJ}} has time from 11-22h), as needed to reach > 1 kHz FOFB 0dB point and better suppress 50 and 90 Hz perturbations & improve general FOFB stability. | {{Boris}}, {{HansJ}} |
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| 2 hours | Investigate injection drifts | {{Martin}}, {{Felix}} |
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Minutes written by {{Felix}}
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