Beam aligned to SPB Pop-In https://in.xfel.eu/elog/XRO+Beam+Commissioning/185

Beam aligned to FXE Pop-In https://in.xfel.eu/elog/XRO+Beam+Commissioning/187

Vibration tests: https://in.xfel.eu/elog/XRO+Beam+Commissioning/188

Camera of M2 may not be working. Please check.

PBLM checked:  https://in.xfel.eu/elog/XRO+Beam+Commissioning/203

Solid attenuators checked: https://in.xfel.eu/elog/XRO+Beam+Commissioning/194

stable beam at 9kev (about 1.1 mJ)

checks of the sample environment required for the upcoming user experiment

test data aquisition of SiO2 samples  (data analysis still ongoing)

commissioning of Jungfrau detectors & XTD6_ATT (closed loop operation)

test of operation with two different AGIPD triggers - normal one and an early one (leaving out the first 71 cells of AGIPD)

issues:

spectrometer motor XTAL_RX still not usable

first arm of XTD1_CRL is interlocked and cannot be used

sucessfull data taking for user samples

beam loss for ~15 min and a small issue with scannerX of the FSSS (could be fixed without support) but otherwise smooth operation

contact with ITDM since the data collection speed could be too high for the transfer speed from SDD to HDD - should be kept under investigation....

intense data taking on various samples

2 main issues:

- data collection using the optimize macro is too fast for the system and calibration and the data transfer from SDD to HDD is slower than collecting new data

- FSSS axis scannerY gives frequent errors since this night which is stopping the macro - check by morning shift & DOC is required

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)

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 ~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)

optimization of seeding ongoing

tasks achieved during alignment:

- polarizer aligned

- analyzer aligned

- detectors + ADQ412 in operation

- check on the energy (up to know, the energy is fine)

- finalized the flatfields of the AGIPD at 0.5 MHz
- optimized the performance of the beam (now 850 - 950 uJ)
- measured flatfield and darks for the Jungfrau detector
- optimized the instrument alignment of FEL beam and ALAS to the center of rotation
 

alignment checks of the CRL2 device as well as the Mono - continuation of both devices together planned for tomorrow
flatfelds for EPIX & AGIPD (needed to be redone because of too low intensity during the previous measurements)
installation of the levitation device and first test measurements

Achievements:

1. Set up PP laser, find spatial and temporal overlap between FEL and PP laser
2. Optimize MCP and HAMP settings for good XAS signal
3. Find time zero from XAS on sample and optimize for XAS delay scans at 40 deg incidence angle
4. Take a fluence series on XAS delay scan from about 0.1 mJ/cm2 up to 2.5 mJ/cm2

Problems:
Nothing of note

Achievements:
- Optimized hRIXS settings for OK edge at 145 deg scattering angle, resolution of about 50 meV
- Transferred the user sample
- Prepared for delay scans on fluorescence signal from YBCO

Problems:
- There was no internet connection at XFEL and DESY for some time
- hRIXS camera goes frequently into error
- XRD motors (STY) go frequently into error

Next steps:
- Find time zero on fluoresce signal from YBCO, test the same for the samples
- Test PP laser damage threshold

Achievements:
1. Finalized tr-RIXS series at 1.74 mJ/cm2
2. Checked FEL alignment
3. Started fluence series for tr-RIXS on peak C, completed: 1, 1.5 and 2 mJ/cm2

Problems:
1. We noticed that calculator for PP laser fluence was not giving a correct value. The formula was corrected and the older logbook entries need to be checked. We start to use the "new values" from now on.
2. XAS processor get stuck and was restarted
3. left PC (pcx30525) got stuck and had to be restarted
4. hRIXS camera scene got stuck, so that it would not operate the PP laser delay stage. Help from DOC.
--> Solution: shutdown and reinstatiate device: SCS_HRIXS_DET/MDL/CAMERA_SHUTTER

Shift Plan:
Continue fluence series for: 0.5, 2.5, 3 mJ/cm2. Decide about further data points.

X-ray delivery

• 9.3 keV, 202 pulses, 564 kHz, intensity slope was fine

Optical laser delivery

• 800 nm, 68 pulses, 188 kHz. stable delivery
• ns laser for illumination

Achievements/Observations

• Continue nanofocusing setup with pump-probe experiment
• Continue Collecting TR-SFX data

• HXRSS delivery, 600 - 700 uJ, 1 bunch, 8.991 keV. Pedestal visibly in HIREX, not checked with MID spectrometer yet.
• beamline aligned and beam brought to popin imager
• struggle with jet pumping, to be continued
• beam brought into experimental hutch, first rough alignment of reference samples and cameras
• Epix flight path leaked and window re-glued