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@@ -137,23 +137,28 @@ Minutes written by {{Felix}}
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2. **Reports**
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* **Operation** by {{Felix}}
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* Installation of UE38 in X07M during 11-day shutdown
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* So far very successful scrubbing after only one long weekend we are back at 400 mA with 6 hours of lifetime compared to 3 to 4 hours of lifetime after one month of scrubbing last year.
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* Nevertheless vacuum remains bad, i.e., vertical beam size 27 μm and horizontal 11 μm
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* After startup the hor. tune was shifted by -0.04
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* Difficult startup after shutdown:
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* New vacuum gauge ARS07-VMCC-0120 for UE38 in X07M was not added to machine max vacuum pressure PV ARIVA-VMAVE:PRESS-MAX or overall max vacuum pressure PV ARIVA-VMAVE-ALL:PRESS-MAX and thus the scrubbing tool was not able to take the most relevant vacuum sensor into account causing many beam dumps and startup difficulties
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* New vacuum gauge ARS07-VMCC-0120 for UE38 in X07M was not added to archiver making it difficult to understand beam aborts
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* Controls hattrick:
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* Controls decided to spontaneously (announced by Silvio 1 day before execution) reboot all IOC Hosts causing all soft-IOCs to hard-restart with many failing to restart/reinitialize causing many spurious issues some of which remain present even now (e.g., [elog](https://elog-gfa.psi.ch/SLS/64305))
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* Many IOCs that controls is responsible for are not well setup for ALH integration, i.e., IOC Alarmlist remains unusable since too many of the listed are in various alarm states, i.e., we are blind to IOCs in bad states. This amplifies the first issue.
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* Many IOCs that controls is responsible for are not setup for automatically initializing to a good state, i.e., no snapshot, no autosave/restore, buggy config files, require special startup sequence, ...
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* Consequences for machine safety from controls hattrick
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* Beam dump of FOFB remained disabled after shutdown??? This issue is generally a risk since this is not integrated into the ALH nor part of the operation snapshot and also not directly visible from within the FOFB GUI
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* The beam dump post mortem scope with Cherenkov fiber signals for confirmation of successful beam dump was initialized to completely wrong settings. The controls on-call was not able to restore the original settings.
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* Due to the missing scope and various missing RF and other pvs the post mortem service is not running since the startup. We have thus accumulated many badly documented beam losses.
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* Recommendation: controls should establish a procedure to restart all IOC hosts ensuring proper initialization to previous state and until then avoid short notice global IOC restarts
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* Other issues encountered
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* News
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* Installation of UE38 in X07M during 11-day shutdown
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* So far very successful scrubbing after only one long weekend we are back at 400 mA with 6 hours of lifetime compared to 3 to 4 hours of lifetime after one month of scrubbing last year.
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* Nevertheless vacuum remains bad, i.e., vertical beam size 27 μm and horizontal 11 μm
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* After startup the hor. tune was shifted by -0.04
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* Vacuum measures for improving vacuum in X11M frontend
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* Installation of additional NEG pump
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* Moved existing vacuum gauge X11MA-FE-PSH1-VMCC-1010 out of line of sight to reduce Bremsstrahlung
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* [elog](https://elog-gfa.psi.ch/SLS/64313)
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* Issues (sorry for the extensive list!)
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* Difficult startup after shutdown:
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* New vacuum gauge ARS07-VMCC-0120 for UE38 in X07M was not added to machine max vacuum pressure PV ARIVA-VMAVE:PRESS-MAX or overall max vacuum pressure PV ARIVA-VMAVE-ALL:PRESS-MAX and thus the scrubbing tool was not able to take the most relevant vacuum sensor into account causing many beam dumps and startup difficulties
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* New vacuum gauge ARS07-VMCC-0120 for UE38 in X07M was not added to archiver making it difficult to understand beam aborts
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* Controls hattrick:
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* Controls decided to spontaneously (announced by Silvio 1 day before execution) reboot all IOC Hosts causing all soft-IOCs to hard-restart with many failing to restart/reinitialize causing many spurious issues some of which remain present even now (e.g., [elog](https://elog-gfa.psi.ch/SLS/64305))
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* Many IOCs that controls is responsible for are not well setup for ALH integration, i.e., IOC Alarmlist remains unusable since too many of the listed are in various alarm states, i.e., we are blind to IOCs in bad states. This amplifies the first issue.
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* Many IOCs that controls is responsible for are not setup for automatically initializing to a good state, i.e., no snapshot, no autosave/restore, buggy config files, require special startup sequence, ...
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* Consequences for machine safety from controls hattrick
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* Beam dump of FOFB remained disabled after shutdown??? This issue is generally a risk since this is not integrated into the ALH nor part of the operation snapshot and also not directly visible from within the FOFB GUI
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* The beam dump post mortem scope with Cherenkov fiber signals for confirmation of successful beam dump was initialized to completely wrong settings. The controls on-call was not able to restore the original settings.
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* Due to the missing scope and various missing RF and other pvs the post mortem service is not running since the startup. We have thus accumulated many badly documented beam losses.
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* Recommendation: controls should establish a procedure to restart all IOC hosts ensuring proper initialization to previous state and until then avoid short notice global IOC restarts
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* Super-3HC
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* Beam dump due to over temperature in absorber
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* Root cause was presumably tuning at non-standard filling pattern with 80 bucket ion cleaning gap
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@@ -164,7 +169,12 @@ Minutes written by {{Felix}}
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* For Linac the consequence is unnecessary losses before booster extraction
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* For the Linac a workaround is now in place when injection is performed by the topup/scrubbing tool ([elog](https://elog-gfa.psi.ch/SLS/64299))
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* On Sunday evening most likely somebody logged into the machine network accidentally switched off the booster RF [elog](https://elog-gfa.psi.ch/SLS/64286)
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* SPB was turned off yesterday before 6 PM and left off causing
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* unnecessary injection losses
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* [elog](https://elog-gfa.psi.ch/SLS/64315)
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* exposing insufficient ALH integration of the linac
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* Maybe insufficient cooling in X11M frontend exposed after pressure improvement
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* [beam dump elog](https://elog-gfa.psi.ch/SLS/64314)
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* **Linac/LTB Optimization** by {{Volker}}
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@@ -205,12 +215,12 @@ Minutes written by {{Felix}}
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3. **Shift Requests**
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* KW36
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* [x] ...
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* KW37
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* [x] ...
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* KW38
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* [] ...
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* [] PolLux bump compensation: 6 hours. (Jonas, Thursday 4th June (Corpus Christi) would be good for me)
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* [] Round beam + long-term stability: 6 hours + night shift. (Jonas, Maybe Friday 5th June from 12:00. Then I reset the machine remotely on Saturday morning.)
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* [] 1 hour Single bunch (Jonas for SuperXAS, maybe as operator training)
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* [] 1 day, tune based optics measurement (Jesus, weekend would be nice)
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* [] 1 day, optics measurement (Masamitsu, weekend would be nice)
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* [] 1 shift, measurement of the cavity-beam-cavity transfer function (Lukas, requires Cigdem for streak camera)
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Minutes written by {{Felix}}
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