User experiment transient grating, Cris Svetina. (LTP)

• Used 7.11 keV from ACC with very good performance, above 4 mJ.
• Collected pump-probe data on user sample most of the time today
• FXE will operate in 24h mode for the rest of the delivery week

X-ray delivery

• 12.72 keV, 10 Hz, NOT stable delivery, pointing drastically changed in the afternoon, presumably due to the train-on-demand operation at SASE2

Optical laser delivery

• 487 nm ns laser (not used)
• 800 nm PP laser for sample illumination

Achievements/Observations

• Beam is aligned for IRDa
• lysosyme date was collected for JF4M geometry

Issues

• X-ray pointing changed in the afternoon, we have to figure out why and whether we can avoid losing trajectory
• Beam is currently clipped and EHC_SCR, @Romain Letrun , @Adam Round please take a look tomorrow
• Detector background was not optimal, might require more work tomorrow
• Roadrunner RX motor did not move, in Karabo, was giving error messages @Adam Round please take a look, maybe resetting the roadrunner outside of Karabo can help
• AGIPD MFPGA2 issue (keep acquiring) which was solved by power cycle

X-ray delivery
- 12.72 keV, 10Hz, ~1.4 mJ/pulse, stable delivery 

Optical laser delivery
- 487 nm ns laser for pump-probe
- 800 nm PP laser for jet illumination, stable delivery

Achievements/Observations
- AGIPD BG optimized (DiffPump realigned)
- IRDA focus optimized (EHC_CRL arm10 (1mm pinhole) inserted)
- Completed dark state measurement of the main sample (more than 4 hours of measurement time)
- Collected PP (pump-probe) dataset with 5 us time delay (about 3 hours of measurement time; Jet was quite stable during the 3 hrs measurement)

Issues
- AGIPD module Q3M2 was not healthy. After another power cycle, it recovered.
- X-ray pulse energy was relatively low in the beginning of the shift. It was partially recovered after running the launch optimization by BKR.

X-ray delivery

- 12.72 keV, 10Hz, ~1.4 mJ/pulse, continuous beam drift in the horizontal direction observed

Optical laser delivery
- 487 nm ns laser for pump-probe
- 800 nm PP laser for jet illumination, stable delivery

Achievements/Observations
- Collected PP (pump-probe) dataset with 5 us time delay more than 12 hours
- Collected 3 runs (5 minutes run) of dark state in the end of the shift
- Jet was quite stable most of the time

Issues
- Continuous beam pointing drift in the horizontal direction observed
- Vacuum spike at MKB_PSLIT section trip the beam shortly which might be related to the beam pointing drift

In-house/commissioning beam time summary night 1

X-ray delivery:
12.7 keV, up to 208 pulses at 1.1MHz, 1.1-1.5 mJ

Optical laser delivery:
PP laser for illumination

Achievements/observations:
Minimised air scattering background on Jungfrau
Collected serial crystallography data with 8, 10 and 13 pulses per memory cell and good hit rates

Issues:
Sample growing again from the catcher cone

In-house/commissioning beam time summary night 2

X-ray delivery:
12.7 keV, up to 288 pulses at 1.1MHz, ~1.2 mJ

Optical laser delivery:
PP laser for illumination

Achievements/observations:
Collected a lot of data: continued 8 pulses per memory cell, around 1h30-2h 1 pulse and 3 runs with 18 pulses.
 

Staff: MS, RB, PS, RdW

In-house/commissioning beam time summary night 3

X-ray delivery:
12.7 keV, up to 288 pulses at 1.1MHz, ~1.3 mJ

Optical laser delivery:
PP laser for illumination

Achievements/observations:
Collected a lot of data with Jungfrau, burst mode 16 memory cells: 
- 1, 4 and 18 pulses/memory cell 
- one run of each setting 1, 4, 8, 10, 13 and 18 pulses/memory cell one after the other
- 8 pulses with 32% transmission
- 4 pulses with half the repetition rate (0.5MHz)

In-house/commissioning beam time summary night 4

X-ray delivery:
12.7 keV, up to 128 pulses at 0.5MHz, ~1.3 mJ, one very short beam down.

Optical laser delivery:
PP laser for illumination

Achievements/observations:
AGIPD timing scan, fine and coarse
A few runs with Jungfrau

Issues:
Some sample delivery issues
Some Jungfrau pipeline issues (will be investigated by DOC during the day)

Measurements to check the impact of bunch compression on FXE mono transmission were successful. We could change the peak current between 4 and 12 kA and saw changes in bandwidth between 17 and 100 eV (at 14 keV). Results are under evaluation.

SA1 brought to safe state:

• CRLs moved out
• Mono moved out
• CVDs in XTD2 ATT inserted
• PBLM-based feedback was started and kept running to avoid beam drifting off of M3
• Hirex shutter closed
• The M1/M2 offset was decreased a bit as compared to saturday mornings' value (was very close to total reflection limit and to safely use 100 bunches, it was decreased to be on the safe side). Should not affect further measurements for XFELO on sunday.

Staff: JK, SB, JE, AS, RW, FK

**X-ray delivery:**
- 21 keV, ~500 uJ

**Optical Laser:**
- None

**Achievements / Observations:**
- Measured several Schimadzu runs

**Issues**:
- the beam intensity was fluctuating significantly during the day; 
- Changed the objective of Schimadzu for wider field then the controller stopped working which took over 1 h; before starting working again.
- One of the attenuators has features on the scene; Si 3200

End of User beamtime 5157

instrument alignment including NaFos, DES spectrometer, diamond detector, PUMA & test samples
seeding makes a good impression based on the DES spectrometer

X-ray delivery

• 9.3 keV, 3.3 mJ, 190 pulses/train

Optical later delivery

• For jet illumination

Achievements/Observations

• Aligned NKB mirrors, slits
• Collected 8 adaptive gain and 22 fixed medium gain runs with lysozyme
• Collected Copper foil flatfield data and glass scattering with different attenuation and sample-to-detector distances

Issues

• XTD2 attenuator watchdog limited the number of pulses to ~190 with XTD2 CVD inserted

X-ray delivery

• 9.3 keV, 3.3 mJ, 190 pulses/train

Optical later delivery

• For jet illumination

Achievements/Observations

• Aligned NKB mirrors, slits again
• Removed the AGIPD shield
• Moved slit3 and slit4 to a fresh position after damage

Issues

• Litframe finder blocked collecting dark images for AGIPD. The problem was solved after resetting the Litframe finder.
• Slit3 and slit4 were damaged

X-ray delivery

- 9.3 keV, 3.1 mJ, 214 pulses/train at 1.1 MHz and 132 at 0.5 MHz

Optical later delivery
- For jet illumination

Achievements/Observations
- Aligned IRU_SLIT-3 again
- Collected PCS data in fixed MG: a lot of diffraction for 5458, only very few for 7559.
- Collected Lysozyme data in fixed MG and adaptive gain.

Issues
- IRU_SLIT-3 right blade was too close to the beam. Physically shifted it by a few mm towards the dark side and improvised lead aperture added between IRU_SLIT-3 and inlinemic.
- LitFrameFinder cannot recognize dark runs for fixed medium gain. One needs to check box Disable DAQ Filtering (on LitFrameFinder scene) or enable Global Passthrough Mode in LitFrameFinder properties, when takes darks for fixed MG.

X-ray delivery

• 11.56 keV, 1-352 pulses @ 1.13 MHz, 2.6-3.1 mJ.
• Average intensity slowly decaying through the night.
• Quite some intensity gradient through the train (~35%).

Optical laser delivery

• 840 nm, 50 fs, 564 kHz.
• Stable delivery.

Achievements/Observations

• Collected data with AGIPD in various scenarios to better understand the behaviour of the 1.2 modules.

Issues

• SoundPlayer alarms not playing. Only way to fix it was to start the server manually via CLI.

X-ray delivery

• 11.56 keV, 1-352 pulses @ 1.13 MHz, 2.6-3.1 mJ. Stable delivery.
• Intensity gradient with long train could not be reduced by BKR.

Optical laser delivery

• 840 nm, 50 fs, 564 kHz.
• Stable delivery.

Achievements/Observations

• Completed AGIPD programme.
• HIREX aligned for our trajectory and 11.56 keV photon energy. Thanks Naresh!
• Calibration of HIREX.

Issues

• Calibration of AGIPD data is slower than usual. Up to close to three hours calibration time observed for some runs and others taken around 2:30 still not calibrated as of now.

X-ray delivery

• 11.56 keV, 1-352 pulses @ 1.13 MHz, 2.4-3.1 mJ. Stable delivery.
• Intensity gradient with long train better than previous shifts (~20% drop).

Optical laser delivery

• 840 nm, 50 fs, 564 kHz.
• Stable delivery.
• Issue with Treacy compressor motion. Could be solved, but required intervention on site by LAS and EEE OCD.

Achievements/Observations

• Calibration of HIREX GOTTHARD II data working after intervention of DOC/DRC.
• Finished PP laser setup.
• PP laser timed.
• Collected SFX data sets using AGIPD in different gain modes.

Issues

• All AGIPD dark processing attempts failed with random missing modules showing up in the reports.
• We were not able to reach the DRC to discuss the above issue earlier during the shift on either 98089, 98088, or 01715330920. DOC informed at end of the shift.
• HIREX had been removed from the SASE1 DAQ, preventing the GOTTHARD II preview from running, and the DAQ was left into passive state after someone had used it during the day with the XTD9 Shimadzu camera.
• Problem with the Treacy compressor delayed the final PP laser preparation, which then had to be done during beam delivery.