Issue, posted by Frederik Wolff-Fabris on 13 Feb 2023, 19:02
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SA3 SCS exit slit: the upper blade was detached from the motor and fall into closed position. Maurizio V. and F. Wolff-Fabris tried to move it out
of the beam by placing spacers to hold the blade up.
Bottom blade was moved down with the motors. Currently both motors are disconnected. |
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SA2 status, posted by Frederik Wolff-Fabris on 11 Mar 2023, 12:46
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The SA2 XTD1 XGM is current offline since Saturday morning.
Yesterday, Friday, it already started to present communication problems ( https://ttfinfo.desy.de/elog/FileEdit?file=/XFELelog/data/2023/10/10.03_a/2023-03-10T19:06:29-00.xml&xsl=/elogbook/xsl/elog-fileform.xsl&mode=edit
) and today it became clear a Hard drive is broken and need to be exchanged. |
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Issue, posted by Harald Sinn on 14 Mar 2023, 10:56
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The longitudinal feedback on SA1/3 was swicthed off by mistake over night. When it will be switched on, the beam may wiggle a bit an SA1+SA3 for
short.
We agreed with SCS and FXE that this will be done today at 11:30 |
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Issue, posted by Harald Sinn on 14 Mar 2023, 14:40
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In order to optimise the performance of SASE2 self seeding, a stronger compression setting is required.
The RC proposed to increase the time window between SASE2 and SASE1/3 to avoid performance degradation and cross talk effects on SASE1/3.
I discussed with SCS and FXE instruments and there seems to be nothing against moving the time trigger by 30 micro seconds later, as proposed |
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Issue, posted by Harald Sinn on 14 Mar 2023, 20:26
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SCS could only use two pulses, because the SXP imager was still in the beam and SXP shutter open.
I removed the SXP imager, so SCS can now get the full beam. The SXP shutter is still open and SXP instrument contacted via email to find out,
if the shutter is intentionally open. |
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Status, posted by Naresh Kujala on 24 Mar 2023, 19:42
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Reply to elog103:
Spoke with Machine RC Thomas Wamsat and SQS.
Machine RC has some ideas to try. SQS have agreed that they can give 30 min for the machine to optimize the intensity. |
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Status, posted by Naresh Kujala on 26 Mar 2023, 13:26
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Machine RC Raimond informed PRC that there is an issue with the A4 module that needs to fix to have a continuous operation. To fix this they need
20 min.
Agreed with all instruments (SPB, SQS, and HED) that at 13:30hr machine will take over the beam for 20 min. |
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Issue, posted by Frederik Wolff-Fabris on 04 Apr 2023, 08:37
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TUE 08:30AM:
The SA3 Cell 17 & 18 Phase shifters do not move and encoders are damaged. A ZZ is needed to exchange the encoders. Instruments are informed
and access will take place Tuesday morning. Machine has separated the north branch. |
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Issue, posted by Andreas Galler on 08 Apr 2023, 10:29
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Changed EPS Interlock condition for SPB_XTD9_IMGPI/SWITCH/SCREEN_OUT
SPB/SFX called DOC this morning for being limitied to two pulses by the EPS (Instrument should have called PRC instead)
After tracing the issue to the SPB_XTD9_IMGPI/SWITCH/SCREEN_OUT switch SPB/SFX decided to take this imager out of the interlock, confirming |
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Issue, posted by Naresh Kujala on 28 Apr 2023, 11:21
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Issue with SA1_XTD9_PBLM and it is stuck.
Hi All,
After discussion with SPB, they will slightly move the PBLM screen where they don't see any distortion in the beam and are willing to continue |
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Issue, posted by Naresh Kujala on 28 Apr 2023, 13:00
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- Received a call from machine RC (Sergey Tomin)
- There is an issue with DOOCS to Karabo bridge, Tim and DESY experts are looking into this and came to the conclusion that it can't be resolved
now and need more time something like 1 week. (probably next week). Due to this PySpectrometer for SA3 is not available, as SQS would like to set up a |
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Attention, posted by Naresh Kujala on 28 Apr 2023, 16:08
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FXE (Fred) confirmed that they don't use beam for night shifts from Friday to Sunday.
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Status, posted by Jan Gruenert on 03 May 2023, 13:01 
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The machine tuning over the night had not yet accomplished fully satisfactory beam conditions mainly at the high photon energies for SA1 and SA2,
therefore tuning continued during WED morning.
Beam was handed over to SCS (SASE3) at 9h with about 2.4mJ at 2.5 keV. |
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SA1 status, posted by Jan Gruenert on 04 May 2023, 00:07
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SASE1 status:
First shift switchover this week at 23h from FXE (19.5 keV) to SPB/SFX (12.4 keV) with issues.
No immediate lasing at 12.4 keV with standard procedures / files, then tuneup using FEL imager (CBor) in multibunch. Wrong pointing (far off |
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SA2 status, posted by Jan Gruenert on 05 May 2023, 16:51
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MID reports an observation that is particular to the operation at the currently high photon energy of 23 keV
MID inserted the XTD6-MID-preabsorber and assumed that it completely stops the beam.
They acquired AGIPD detector images as dark frames but were surprised to still find some weak background signal (not dark). |
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Attention, posted by Jan Gruenert on 08 May 2023, 09:04
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Info from XRO (Maurizio Vannoni) to PRC concerning tunnel access request #152936 (Inspection and repair of SQS ESLIT)
- The ZZ-access will be done by Marc Planas, Massimiliano Di Felice, and Idoia Freijo.
- They will start their access between 9h00 and 9h30 and end their access by 12h30. |
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Attention, posted by Michaela Petrich on 11 May 2023, 09:21
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Dear all,
I just got the information for BKR that due to a failed klystron we had a downtime around 8:40am this morning for about 30 mins.
Operation could be restarted successfully afterwards but with a different energy distribution than before. SASE2 has now reduced pulse energy |
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Issue, posted by Naresh Kujala on 31 May 2023, 17:35
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HED reported that they are unable to go 352 pulses and while changing/dailing the no. of pulses in the bunch Pattern it is showing the EPS is
limited to 300 pulses. It seems on the SA2_MAIN scene the link for bunch Pattern apparently using the macros scene, which is preventing it from going |
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Status, posted by Naresh Kujala on 05 Jun 2023, 08:28
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- SA2 photon beamline
Today morning found the CRL1: 5 and 6 arm and Pop-in 45-I are still IN. I have retracted them. |
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Issue, posted by Jan Gruenert on 08 Jun 2023, 10:37
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SASE2 vacuum incident
7h10 : MID informs PRC about a vacuum incident in the SASE2 tunnel which tripped the beam. Instructed to contact
directly VAC-OCD
8h26 : VAC-OCD informs that investigation is ongoing, but beam can be delivered. This kind of trip usually occured rarely |