After receiving beam from SPB, we noticed that there is a werid shape of beam in the FEL imager which was not observed yesterday.

Maybe someone left X-ray component in the beam.

Beam delivery for proposal 3378

Achievements/Observations

• Collected data on liquid H20 and D20
• Found conditions where only ice were seen. approx. 4h of ice data taken. Starting to look at correlation maps
• Background at 0.88mm nozzle distance measured

To do for next shift:

Continue taking data

Morning - Users from proposal 3455 continued with their measurement program. Beam stable during the measurements.

Afternoon - Changed the setup from 3455 to 3326.

Evening - Beginning of the alignment for users. Beam stable.

Attachment 1: Beam in SPB hutch with Si500

Attachment 2: Beam without Si500

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.

*** Update 10:20AM:

ZZ is finished; beam in North Branch to restart soon.

04 Apr 2023, 07:44 we realize that the SetpointsHED Macro lost all values, probably during the Karabo Crash. Since it is a macro, the values arent stored anywhere. DOC tries to recover. Meanwhile, we found the values for 3mrad, 2.5mrad and 2mrad in old screenshots and update the macro values from that. Saving those now locally in nextcloud/user/Alex.

04 Apr 2023, 08:17 Solution by DOC: Apparently the macro CAN save the values, and that was also done during the bringupdays, but they are only saved on the GUI Server which the macro was started on, in this case GUI2. However, when Karabo was restarted, the macro was started on GUI1, so the local save files could not be retrieved. DOC copied the old save files to GUI1 now as well so we could reload the old positions for all setpoints.

Achievements:

Collected more scans on cyanocobalamin, both delays scans and dynamic XAS

Issues with bad signal in beginning but good signal in the last hours

Overall successful beamtime, demonstrating new transmission/absorption setup with liquid jet and DSSC

Problems:

None

Achievement

• Measured tXAS at the Fe L-edge of Fe(bpy)3 using both delay and energy scans. 

Issues

• The cold traps ran empty on the chamber resulting in a pressure spike that interlocked the DSSC
• The rough vacuum of the chem DPS degraded causing TP5 to go into error. This resulted in valve closing and stopping the measurements
• Jet froze twice

X-ray delivery

• 1-202 pulses, 564 kHz, stable delivery
• Beam was down from 06:08

Optical laser delivery

• 800nm, 50 fs, 282 kHz, stable delivery 

Achievements/Observations

• Resasnable amout of data was collected

Issues

• No major issue today

X-ray delivery

• 1-202 pulses, 564, 282, 141 , 70.5 kHz, stable delivery

Optical laser delivery

• 800nm, 50 fs, 282 kHz, stable delivery 

Achievements/Observations

• Resasnable amout of data was collected
• Sample was tested

Issues

• No major issue today

Achievements

• Optimized BOZ for Co and Fe
• Estabilished Stable liquid jet flow with 30 mM Fe(bpy)3

Problems

• Jet froze several times
• Chamber warmed up earlier in the day. This led to a "dusting" of CNCbl on many surfaces and in the large turbo. We cleaned the turbo with ethanol.

Plan for Night Shift

• Continue measuring stitic XAS with BOZ scheme.

- seeding at ~800 uJ

- repaired the laser interlock of A.08

- EPIX back in operation

- timing difference of both branches of the SDL measured with the optical laser (~4ps)

- measurement of samples with single & both branches (damage threshold, crystallization studies & studies on reversible changes)

X-ray delivery

• 1-202 pulses, 564, 282, 141 kHz, stable delivery

Optical laser delivery

• 800nm, 50 fs, 282 kHz, stable delivery

Achievements/Observations

• Alignment for Pump-probe experiment was finished
• Sample was tested

Issues

• No major issue today

Achievements

• Found coarse timing between XFEL and optical laser

Problems

• Did not see a observe fine timing signal from silicon nitride measurement

Plan for night shift

• Continue with liquid jet optimization and static measurements

achievments: alignment of the SDL (both branches)

measuring of samples & calibrants

issues:

- broken laser interlock - cannot be set - PRC is informed and contacted SRP - repair expected in the morning

- ScannerX broken - morning shift might contact DOC or expert

- EPIXs do not send data after rearrangement of the modules - expert consulation might be necessary

Seeding at 9 keV with 800 - 1000uJ intensity

1. alignment of the lower branch of the SDL

2. focussing with CRL2 and check of the beam size using wire scans (slightly more than 10 um)

3. calibration of the EPIX2 position using calibrant LaB6 and optimizing its position

4. measuring scattering of the sample (not a conclusive behaviour yet)

The door from MID side entrance was smashed and we lost the radiation permit.

The acciedent happened between 11 (when the door was lest use by MID members) and 14:19 (when the picture was taken).

It is possible that we will have the permit in the next hours to countinue.

The Door was repared by TS (thank you for the fast answer) and at 15:40 Eric gave us the right to proceed after the crosscheck of all the systems.

X-ray delivery

• 1-165 pulses, 1.1 MHz - 56.4 kHz, upto 350  uJ @ 50 pC

Optical laser delivery

• ns laser for imaging

Achievements/Observations

• Collected data for about 6 hours with different samples
• Data collection at lower repetiton rates with less number of pulses
• Data to characterize the divergence of ASE collected
• Photodiode calibrated at 8 keV again

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.

Update: 13:55hr

Machine finished fixing the issue for the A4 module and beam handover to all beamlines.

X-ray delivery

• 1-165 pulses, 1.1 MHz - 56.4 kHz, upto 350  uJ @ 50 pC

Optical laser delivery

• ns laser for imaging

Achievements/Observations

• Collected data for 3 to 4 hours with different samples
• Data collection at lower repetiton rate (113 kHz) with less number of pulses
• Data to characterize the divergence of ASE collected