Issue, posted by Jan Gruenert on 28 Jan 2024, 13:50
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RC / BKR informs : Beam is down (since 12h10), all beamlines affected
The reason is failure of a quadrupole (power supply) downstream of the dogleg.
The MPS crew is working on recovery, access to XTL ongoing. |
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Status, posted by Jan Gruenert on 18 Apr 2024, 19:31
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The intra-bunchtrain feedback (IBFB) was not active until today afternoon.
Although not strictly required or requested for the current week experiments,
it was decided to turn on this feedback, which should generally be active to |
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SA2 status, posted by Jan Gruenert on 20 Apr 2024, 23:58
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20.4.2024 / 22h51:
DOC informed PRC that the SASE2 topic broker had to be restarted.
The EPS power limit was reset by PRC to the previous value of 40 W. |
Issue, posted by Jan Gruenert on 25 Sep 2024, 09:47 
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Issue with SA3 Gas attenuator (SA3_XTD10_GATT)
9h06: SQS informs PRC that the Argon line in GATT is not reacting on pressure change commands,
no GATT operation, which is required to reduce pulse energies for alignment. VAC-OCD is informed.
ZZ access is required to check hardware in the tunnel XTD10. |
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Status, posted by Jan Gruenert on 27 Sep 2024, 15:17
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Bunch pattern SA1 / SA3
SQS requests to change the bunch pattern.
Currently SA1/SA3 run interleaved as 131313...
The first bunch in the train (for SA1, non-lasing in SA3) nevertheless is visible as a small pre-peak in the diode signal which SQS uses to check |
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Issue, posted by Jan Gruenert on 29 Sep 2024, 11:42
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A2 failure - downtime
The machine / RC informs (11h22) that there is an issue with the accelerator module A2 (first module in L1, right after
the injector).
This causes a downtime of the accelerator of 1 hour (from 10h51 to 11h51), affecting all photon beamlines. |
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Status, posted by Jan Gruenert on 29 Sep 2024, 12:13
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Beam is back. Current status:
SASE1 (SPB/SFX)
2.72 mJ, 352 bunches/train, 6 keV
SASE2 (MID)
880 uJ,
1 bunch/train, 8 keV
SASE3 (SQS)
4.56 mJ, 1 bunch/train, 400 eV (3.1nm)
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Issue, posted by Jan Gruenert on 23 Nov 2024, 00:36
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20h16: beam down in all beamlines due to a gun problem
20h50: x-ray beams are back
Shortly later additional 5 min down (20h55 - 21h00) for all beamlines, then the gun issue is solved. |
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Issue, posted by Jan Gruenert on 23 Nov 2024, 00:48
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Broken Bridges
Around 21h20 the XPD group notices that several karabo-to-DOOCS bridges are broken.
The immediate effect is that in DOOCS all XGMs in all beamlines show warnings
(because they don't receive important status informations from karabo anymore, for instance the insertion status of the graphite filters nrequired |
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Issue, posted by Jan Gruenert on 23 Nov 2024, 10:23
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Broken Radiation Interlock
Beam was down for all beamlines due to a broken radiation interlock in the SPB/SFX experimental hutch.
The interlock was brocken accidently with the shutter open, see https://in.xfel.eu/elog/OPERATION-2024/203
Beam was down for 42 min (from 3h00 to 3h42) but the machine came back with same perfomrmance. |
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Issue, posted by Jan Gruenert on 23 Nov 2024, 10:27
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SA1 Beckhoff issue
SA1 blocked to max. 2 bunches and SA3 limited to max 29 bunches
At 9h46, SA1 goes down to single bunch. PRC is called because SA3 (SCS) cannot get the required >300 bunches anymore. (at 9h36 SA3 was limited
to 29 bunches/train) |
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Issue, posted by Jan Gruenert on 23 Nov 2024, 15:11
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Damage on YAG screen of SA1_XTD2_IMGFEL
A damage spot was detected during the restart of SA1 beam operation at 14h30.
To confirm that it is not something in the beam itself or a damage on another component (graphite filter, attenuators, ...), the scintillator
is moved from YAG to another scintillator. |
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Issue, posted by Jan Gruenert on 24 Nov 2024, 13:47
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Beckhoff communication loss SA1-EPS
12h19: BKR informs PRC about a limitation to 30 bunches in total for the north branch.
The property "safety_CRL_SA1" is lmiting in MPS.
DOC and EEE-OCD and PRC work on the issue. |
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Issue, posted by Jan Gruenert on 24 Nov 2024, 14:09
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Beckhoff communication loss SA1-EPS (again)
14h00 Same issue as before, but now EEE cannot clear the problem anymore remotely.
An access is required immediately to repair the SA1-EPS loop to regain communication.
EEE-OCD and VAC-OCD are coming in for the access and repair. |
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Status, posted by Jan Gruenert on 24 Nov 2024, 17:23
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Status
All beamlines in operation.
The attachment ATT#1 shows the beam delivery of this afternoon, with the pulse energies on the left and the number of bunches on the right.
SA2 was not affected, SA1 was essentially without beam from 13h45 to 16h15 (2.5h) and SA3 didn't get enough (386) pulses in about the same period. |
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Status, posted by Jan Gruenert on 04 Dec 2024, 15:34
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| Beam delivery Status well after tuning finished (which went faster than anticipated). |
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Issue, posted by Jan Gruenert on 05 Dec 2024, 07:38
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Accelerator module issue
7h20: BKR/RC inform that there is was issue with the A12 Klystron filament which had caused
a short downtime (6h15-6h22) and was taken offbeam.
Beam was recovered in all beamlines, but the pulse energy came back lower especially in SA1 (before 920uJ, after about 500 uJ) and higher fluctuations. |
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Issue, posted by Jan Gruenert on 05 Dec 2024, 15:58
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additional comment to MESSAGE ID: 217
PRC was informed by MID at 8h50 about a new appeared limiation to about 60 pulses / train (MID operated previously at 120 pulses/train).
It turned out that this limitation came from the protection of the SA2_XTD1_ATT attenuator, in partiicular the Si attenuator. |
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Shift summary, posted by Idoia on 27 Jan 2024, 15:17
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SASE3
Open Issues:
- currently it is not possible to change the number of pulses because of Instruments beam permission interlock |
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Shift summary, posted by Idoia on 23 Jul 2024, 17:17
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ZZ access at XTD10
The
LE PM X and HE PM X motors were checked and they are not physically moving. It was also noticed that the encoders numbers aren't changing. -> second
ZZ was done and the problem was solved. (check entry https://in.xfel.eu/elog/XRO+Beam+Commissioning/412)
The SQS exit slit was checked |