Issue, posted by Harald Sinn on 24 Jul 2024, 10:26
|
In SASE2 undualtor cell 10 has issues. Suren K. will do a ZZ at 11:30 to fix it (if possible). Estimated duration: 1-3 hours.
Update 12:30: The problem is more severe than anticipated. Suren needs to get a replacement driver from the lab and then go back into the tunnel
at about 14:00 |
|
Issue, posted by Harald Sinn on 24 Jul 2024, 11:35
|
The control rack of the soft mono at SASE3 has some failure. Leandro from EEE will enter the XTD10 at 12:00.
Beam will be interupted for SAS1 and SASE3.
Estimate to fix it (if we are lucky) is one hour. |
|
Issue, posted by Harald Sinn on 27 Jul 2024, 09:10
|
SASE1: Solid attenuator att5 is in error. When it is tried to move it out, the arm lifts, but does not reach the final position before the software time-out.
We increased the software time-out from 4 seconds to 7 seconds, which didn't help. We suspect that there is a mechanical problem that prevents
the att5 actuator to reach the out position. |
Issue, posted by Romain Letrun on 10 Aug 2024, 07:19 
|
The SASE1 HIREX interlock is not working as expected.
At the position 'OUT' (step 2 in HIREX scene) and while none of the motors are moving, the interlock SA1_XTD9_HIREX/VDCTRL/HIREX_MOVING
is triggered, which prevents the use of more than two pulses. |
|
Issue, posted by Peter Zalden on 08 Sep 2024, 20:30
|
We observe a continuous horizontal beam drift in SA1 after the M1 incident. It seems not to converge, so one can wonder where this will go....
Attached screenshot shows the M2 piezo actuator RY that keeps the beam at the same position on the M3 PBLM. These are about 130 m apart, The
drift is 1V/12 hours. 0.01V corresponds to a beam motion by 35 um. So the drift velocity is 0.3 mm/hour. In the past days this had at least once lead to |
|
Issue, posted by Peter Zalden on 09 Sep 2024, 23:19
|
| Finally, the drift velocity of the pointing reduced approx a factor of 2 as compared to yesterday, see attached. Possibly it will still converge... |
|
Issue, posted by Jan Gruenert on 25 Sep 2024, 09:47
|
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. |
|
Issue, posted by Raúl Villanueva-Guerrero on 25 Sep 2024, 10:12
|
Issue with SA3 Gas attenuator (SA3_XTD10_GATT) - SOLVED
Dear all,
after the reported issue by SQS colleagues regarding the impossibility to inject Argon, and after a first remote evaluation, we (VAC) have entered
XTD10 to assess the status and verify the most probable working hypothesis: a manual valve in the supply line was closed (otherwise as expected). Joshua |
|
Issue, posted by Chan Kim on 25 Sep 2024, 16:53
|
600um thick CVD diamond (XTD2 attenuator) seems damaged
Attachment 1: 600um thick CVD diamond (Arm 4) OUT |
|
Issue, posted by Jan Gruenert on 29 Sep 2024, 11:42
|
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. |
|
Issue, posted by Naresh Kujala on 07 Oct 2024, 15:15
|
14:40hr
FXE and HED reported the laser synchronization issue. Informed to Machine RC.
LbSync team couldn't fixed this issue remotely and on there way to Schenefeld to fix this issue. |
|
Issue, posted by Frederik Wolff-Fabris on 12 Nov 2024, 10:07
|
- While FEL IMG with YAG screen was inserted in SA1, EPS/MPS was not limited to the expected 2 bunches, but to 30 bunches;
- It was found
the condition #3 ("SA1_XTD2_VAC/Switch/SA1_PNACT_Close") at the EPS Mode-S was disabled which should be always enabled;
- Condition
#3 has been enabled again and now SA1 is limited to 2 bunches, as expected when YAG screen is inserted.
Further investigations will be done to |
|
Issue, posted by Frederik Wolff-Fabris on 15 Nov 2024, 10:50
|
SA2 cell#5 undulator segment moved at ~09:45AM Fri to 25mm without aparent reason and undulator experts need a ZZ to exchange power supply; FEL
instensity dropped from 230uJ to 60uJ s consequence.
RCs are preparing south branch for the iminent ZZ. HED is informed. |
|
HED 6keV after Euler MDL, posted by Antje Trapp on 19 May 2024, 15:20
|
| |
|
Experiment summary, posted by Naresh Kujala on 28 Jan 2024, 19:55
|
X-ray delivery
0.25nC, 14 GeV, rep rate 2.25 MHz, 9300 eV, 1 to 100 pulses, ~2000 uJ
M1 and M2 mirrors are aligned and beam trajectory to
SPB.
Goal |
|
Experiment summary, posted by Konopkova Zuzana on 13 Feb 2024, 08:55
|
*Achievements :
- Generally rather successful with very high quality beam parameters
- We had a nearly steady 800 uJ+ HXRSS flux during the user run and ~ 4mJ SASE during the setup at HED. |
|
Experiment summary, posted by Konopkova Zuzana on 05 May 2024, 00:25
|
proposal 5700 finished on 04.05. The experiment used 352 pulses at 4.5 MHz and 18 keV to X-ray heat pressurized samples in diamond
anvil cells. Overall succesful on several samples.
Issues:
the requested 20.5 keV photon energy had too low pulse intensities
so we had to go down to 18 keV
pulse energies at 18 keV (300-400 uJ) were insufficient for some samples
the ramp in pulse envelope |
|
Compensation of M2 RY motor for the case of Piezo off, posted by Kelin Tasca on 18 Jun 2024, 13:03
|
We plan to put the piezos of M2 off, in the (unprobable) case that this is the reason of the "jumps" in SASE3 trajectory.
Therefore, I measured the change on RY and RZ motors, to correct all the positions
Fig 1: initial position, Motors Ry=10.5425 and RZ=-14.7200 Piezo Ry =5 and Rz=5 |
|
Attention, posted by Andreas Galler on 11 Aug 2024, 00:13
|
EPS Interlock change for Mode30:
the 3 HIREX Interlock conditions had been disabled
|
|
(Resolved) Issues with DAQ, posted by Björn Senfftleben on 30 Mar 2024, 00:17
|
We had some trouble with the DAQ. It was not able to start runs properly.
We got the following error messages:
initially: |