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.

Dear all,

we calibrated the mirror vertical motors to their geometrically neutral.

Please be aware that saved values for beamline settings may no longer be valid. This mainly applies to the vertical motor positions, but will have an impact on Tx and Ry values as well.

As starting point, use XRO Optics Setpoints 'C' - this setting was last used to bring beam to SPB

- M3 TX moved to 0 in steps of 1 mm and beam on FXE Pop-In corrected with M3 RY (+) and M2 RY

- Started calibration with M3 Rz in steps of 0.5 (+) and corrected with M2 RY and RZ to find a position with a minimum of parasitic motion

- Iterations with M3 TY

- CRL 3 and 4 were inserted (using find target)

- The backlash correction was disabled

- Curve for M3 Rz position with Ry correction done. M2 RY/RZ corrections to move beam up and down to have it on the screen

- Curve for M3 Ty position with Ry correction done.

- Curve for M3 Rx position with Ry correction done

M3 vertical motors calibrated to 0

Starting shift with mirror motor calibration:

- beam is centered on FEL imager

- pblm in XTD9 is inserted

We removed both silicon solid attenuator and pblm

Starting shift with mirror motor calibration:

- found solid attenuator 0.5mm silicon inserted

- beam is centered on FEL imager

- pblm in XTD9 is inserted

We removed both silicon solid attenuator and pblm

Yesterday two motors of the SASE2 seeding mono were damaged. The mono was exchanged in the afternoon and pumped down. Currently, an issue with the vertical cystal motion is being investigated.  The vacuum improved much faster than expected after this intervention, so the hope is that the tunnel can be searched soon and electrons could go through SASE2 already this afternoon. Watch for updates in the program for SASE2 in the DESY logbook under 'Schedule'.     

In-house/commissioning beam time summary night 5

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:
- AGIPD1.2 tests with different trigger delays, gain modes, signal levels ...
- inhouse proghram completed

Issues:
Some sample delivery issues

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)

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 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.
 

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

X-ray delivery

• 12.72 keV, 10Hz, ~1.4 mJ/pulse, some beam drift in the horizontal direction observed (probably mirror related)

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
• Jet and data collection was stable most of the time

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

Continuous pointing drift in horizontal direction.

It may trigger a vacuum spike at SPB OH (MKB_PSLIT section) at 21:07 pm.

DOOCS panels are again incorrectly reporting the FXE shutter as opened when it is in fact closed. This had been fixed after it was last reported in February (elog:24), but reappeared now.

We had some trouble with the DAQ. It was not able to start runs properly.

We got the following error messages:

initially:

[00:01:27]: Problem of communication with data manager

[00:01:30]: Start new run ...

[00:01:38]: Failed starting data recording

DM: error at registerRun (Request to MDC timeouted)

after trying to start the run again:

[00:05:35]: Start new run ...

[00:05:35]: Failed starting data recording

DM: error at registerRun (Problem of communication with MDC

#Info: MDC-1100: MDC web server error: Error creating run

#Details: {'run_number': ['must be unique per proposal', 'has already been taken'], 'experiment_id': ['has already been taken']})

Cycling the DAQ resolved the issue.

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.

Pulse energy fluctuation observed after full train operation in SA2 starts.

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

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