X-ray delivery

• 11.56 keV, 1-352 pulses @ 1.13 MHz, 2.4-3.1 mJ. Stable delivery.
• Intensity gradient with long train now slightly less than 20%.

Optical laser delivery

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

Achievements/Observations

• Collected TR-SFX data.

Issues

• Challenges with sample delivery.

Weekend summary:

Overall stable beam delivery with 300bunches @18keV and 750uJ

-issue with XGM on Saturday night/morning

-The intensity in SA2 over the train is dropping of when SA3 is changing some parameters. BKR can fix it within a couple of minutes

-The users found suitable working conditions to overcome the limitations from the 10bar He supply line.

X-ray delivery

• 11.56 keV, 1-197 pulses @ 564 kHz, 2.4-3.1 mJ.
• Beam down a bit over 1 hour due to accelerator interlock problem.

Optical laser delivery

• 840 nm, 50 fs, 50 pulses @ 141 kHz.
• Stable delivery.

Achievements/Observations

• PP laser timed.
• Completed TR-SFX dataset at 30 ps delay.

Issues

• Scantool stuck in ACQUIRING state. Recovered by restarting the device.
• HIREX data missing for most of the night. GOTTHARD II control and receiver devices found down in the morning. Server on which they are reunning appears to have crashed at 1:36. DOC informed in the morning.

X-ray delivery

• 11.56 keV, 1-197 pulses @ 564 kHz, 2.6 mJ.

Optical laser delivery

• No PP laser output after shift change.

Achievements/Observations

• Collected static SFX data.

Issues

• Unavailability of PP laser prevented collection of TR-SFX data, which was the main goal of the shift.

X-ray delivery

• 6.0 keV, up to 202 pulses at 564 kHz and 101 at 282 kHz, 0.8-1.6 mJ
• Low pulse energy after beam handover. Improved around 10:00.
• ~1.5 hour downtime due to issue with A5.
• Several timing jumps of up to 1.5 ps visible on BAM and confirmed by X-ray/optical laser timing measurement at the instrument.

Optical laser delivery

• 770 nm, up to 202 pulses at 564 kHz and 101 at 282 kHz.
• Stable delivery.

Achievements/Observations.

• Collected time-resolved diffraction from gold and gold-platinum nanorods at multiple laser fluences and over long and short delay scans.

Issues

• AGIPD interlocked overnight and again during the morning due to temperature.
• Had to perform timing measurement and correction multiple times throughout the day due to timing jumps.

X-ray delivery

• 6.0 keV, up to 202 pulses at 564 kHz, 1.8-1.9 mJ.
• Stable delivery except for downtime at start of shift (until 7:15) and two more hours in the morning.

Optical laser delivery

• 770 nm, up to 202 pulses at 564 kHz.
• Stable delivery.

Achievements/Observations

• Collected time-resolved diffraction from gold and gold-platinum nanorods at multiple laser fluences.

Issues

• Vacuum spike in EHU_PSLIT section.
• DAMNIT backend process stuck. A couple of Maxwell nodes were unaccessible. Solved by DOC and DA OCD.
• Issue with two AGIPD modules noticed around 21:20. Could not be recovered before end of the shift. To be further investigated tomorrow morning.

beam parameters: 2 colors at around 6.5 keV, 1 pulse

achievements:

user program continues with data acquisition at slightly varying photon energies (tens of eV both colors simultaneously) and at different delays between the colors

Issues:

• users have scheduled datasets to be measured overnight with larger delays up to 350 fs, however, the BKR was able to go only up to 100 fs delay despite having larger delays earlier in the experiment (even during nights)

X-ray delivery

• 6.0 keV, up to 202 pulses at 564 kHz 1.3-1.8 mJ.
• Decaying intensity through the day. Recovered once at 15:15 and slowly decaying again after that.

Optical laser delivery

• 770 nm, up to 202 pulses at 564 kHz and 101 at 282 kHz.
• Wavelength drift due to problem with BCC piezo stage. Mitigated by LAS.

Achievements/Observations

• Collected time-resolved diffraction from gold and gold-platinum nanorods/spheres at multiple laser fluences.

Issues

• Problem with the four ASICs in module Q2M1 of AGIPD could not be solved. Operated without those for today. Will be further investigated later on.

X-ray delivery

• 7.0 keV, up to 202 pulses at 564 kHz, ~1.7 mJ.
• Number of pulses initially limited to 178. Promptly addressed by BKR.

Optical laser delivery

• 800 nm, up to 202 pulses at 564 kHz.
• Oscillating wavelength due to known faulty DMBCC stage, but otherwise stable delivery.

Achievements/Observations

• Aligned instrument and collected data with test samples as well as various background signals in preparation for next suer experiment.

Issues

• Changing the ROI of a Zyla appears to affect its timing.

X-ray delivery

• 7.0 keV, up to 202 pulses at 564 kHz, 1.6-1.9 mJ.
• Average pulse energy tuned up to 1.9 mJ at 14:45, but slow continuous decay after that down to 1.7 mJ at the end of the shift.
• 45 minutes downtime in the morning and another 15 minutes to reset the IBFB later on, as coordinated by the PRC.

Optical laser delivery

• 800 nm, up to 202 pulses at 564 kHz.
• Large intensirty gradient through the burst compared to previous days. Recovered after moving the RF phase shifter. LAS informed.

Achievements/Observations

• Collected calibration and background data for upcoming user experiment.

X-ray delivery
- 7.0 keV, up to 202 pulses at 564 kHz, 1.0 mJ.
- Average pulse energy was about 1.9 mJ on Tuesday and Wednesday. It has to be discussed with BKR tomorrow morning.

Optical laser delivery
- ns laser for jet illumination

Achievements/Observations
- BG measurement with water, buffer low salt
- Lysozyme measurement for geometry file
- Data collection for six different sample concentrations [2 x 15 minutes runs]

Issues
- Pulse energy is very low as compared with Tuesday and Wednesday in this week.
- Damage found on IRU_SLIT4 Top and Bottom blades.
- NKB focus moved by ~20um at around 15:00 (during the handover period). SideMic X moved +20um to compensate it.

X-ray delivery
- 7.0 keV, up to 202 pulses at 564 kHz, 1.0 mJ.
- X-ray beam pointing changed at around 18:12 and it affects nano KB focus (from ~200nm to ~1um).

Optical laser delivery
- ns laser for jet illumination

Achievements/Observations
- Detector moved the most upstream position (~1.5 m sample to detector distance)
- BG measurement with water, buffer low salt
- Silver Behenate measurement for geometry file (mostly for detector distance)
- Data collection for different sample (pure) concentrations

Late Shift summary

Achievements:
- recovered the beam overlap
- changed lens position to have larger OL beam
- spatial overlap on YAG
- measured RIXS data delay scan at fixed photon energy

Problems:
- none

X-ray delivery

• 7.0 keV, up to 202 pulses at 564 kHz, 1.0 mJ.

Optical laser delivery

• ns laser for jet illumination

Achievements/Observations

• Data collection for user sample through column

Issues

• Pressure spike while rotating nozzle tripped AGIPD
• Temperature of ASICs of Q2M1 module too low and not easy to turn it on (issue solved after changing the bath temperature to -27 degreeC)
• Julabo chiller issue again (In the end, set temperature changed to -29.5 degreeC and continued the experiment)
• Another 2 ASICs in Q2M2 and Q2M3 seem unhappy

**X-ray delivery**

• 7.0 keV, up to 202 pulses at 564 kHz, 1.0 mJ.

**Optical laser delivery**

• ns laser for jet illumination

**Achievements/Observations**

• Data collection completed for all the requested samples from user.

**Issues**

• Run repeater behave once abnormally.  Run repeater started with 30 minutes duration, but the first run (run #238) stopped after 40 seconds and next run (run #239) started.

alignment of the instrument including collimation and beam shaping
test of the tempus detector using standard samples with different rep rates, intensities & # of pulses
start commissioning of the PhotonArrivalMonitor (temporal & spatial overlap, white light spectrum)

continue with Tempus tests
continue with PAM commissioning (first results of the working device at MID)

comments:
changed to 10 keV in order to use only one focussing lens in CRL2 and generating a smaller focus

issues:
vacuum issues in the MPC (reason: open roughing valve)
FSSS (hall sensor broken - exchange of the entire device planned for tomorrow)