Found the interference fringe at Suna microscope with Zyla cam from MID split-and-delay line. 
The fringe patterns were recorded as a function of delay controlled by the upper branch motor position. 
Obtained the interference fringe patterns with two pulses with different repetition rate of machine. 
BKR provided the two color HXRSS seperated by a few eV, and SDL was aligned accordingly. 
The fringe patterns were recorded as a function of delay with two X-ray photon energies.

Found spatial overlap at Suna microscope with Zyla cam.
The splitting ratio was obtained about 1:1. 
The spatial jittering from upper and lower branch were investigated.
The temporal overlap and fringe will be investigated further.
 
 

X-ray delivery

11.56 keV 202 pulses @0.5 MHz, ~1.0 mJ

some downtime due to fire alarm in the tunnel

Optical laser delivery

800 ns laser for jet visualization

PPLaser for time-resolved data collection

Achievements/Observations

• PPLaser timing and alingment done
• Collected several hours of PYP sample with 30ps laser delay

Issues

• DAMNIT issue solved with OCD DA
• some online calibration issues from before persisted

Summary 06.08 - 10.08

X-ray delivery

• 9.3 keV, 1-352 pulses @ 1.13 MHz and 564 kHz, 1.4-1.8 mJ
• 11.56 keV 1-352 pulses @ 1.13 MHz and 564 kHz, 0.7-1.0 mJ.
• Large impact on SASE1 when SASE3 used pulse on demand at the start of the week. Ok since we were setting up, but would be problematic during measurement.
• Overall stable delivery except for the point above.
• Notable downtimes:
  • Thursday afternoon 08.08, beam down during ~1 hour for a ZZ in XTD9 to fix the monochromator motion.
  • Thursday evening 08.08, beam down during the last 45 minutes of the shift following wavelength change request of SASE3.
  • Friday afternoon 09.08, beam down for ~2 hours due to ZZ to fix communication with a device.
  • Saturday morning 10.08, beam down during 45 minutes due to problems with A5.

Optical laser delivery

• 800 nm, 50 fs, 1-202 pulses @ 564 kHz and 141 kHz.
• Laser delivered from Thursday afternoon, as agreed with LAS. One of the issues addressed, but performances still sub-par and more work is required.

Achievements/Observations

• Collected data for all but one PCS proposals. Sample for last PCS is expected to be delivered to EuXFEL on Monday.
• Setup of HIREX for 9.3 and 11.56 keV.
• Completed laser setup for IHR.
• Established laser/X-ray timing.

Issues

• Multiple issues with the online calibration pipeline. It is regrettable that a new version including breaking/major behaviour changes has been deployed after the bring up days, where everything had been succesfuly tested.
  • Constants failing to load after changing detector configuration in the calibration manager. Hotfixed by CAL OCD.
  • AGIPD double pixels mask not correctly applied. Hotfixed by CAL.
  • Changing number of memory cells in the calibration manager, but without loading new constants, changes drastically what is displayed in the AGIPD corrected preview. DOC informed, fix pending.
  • Independent settings for the different pipeline preview data have been implemented, but not communicated. This is very dangerous for the detectors. We have implemented a workaround to restore the previous behaviour.
  • Difficulties in reliably getting a preview of all AGIPD modules even with settings we used with the previous version of the calibration pipeline.
  • HIREX correctino devices had been renamed in the SASE1 topic, but no information was provided to instruments resulting in missing clone devices in instrument topics.
• Offline calibration throws error for most runs because there are sequence files that contain no valid trains produced at the end of the runs. This is not really a problem and would require a less ambiguous statement in myMdC as this makes it difficult to spot when an actual error occurs. DOC/CAL informed.
• DAMNIT could not be started on non-display Maxwell nodes. It turns out an additional argument is required following the OS update during the summer maintenance period, but this is not documented. The solution was provided by DA OCD.
• Ice detector generating many false positive and sending of report not working. To be addressed with DA on Monday.
• Graphical bug in Karabo Image Graph widget when the same data are displayed in two scenes. More detail will be provided to CTRLS.
• XTD9 PBLM at the nominal 'out' position was not fully out and the beam could still be seen on it.
• HIREX interlocks not working as expected and preventing the use of more than two pulses when HIREX is supposedly extracted from the beam path. Mitigated by the PRC.

Found the spatial overlap on the Suna microscope with Zyla.
Found the SDL motor position giving 200 fs time difference between the upper and lower branches. 
The encoder and current values of DC2_CASZ and DC1_CASZ are not 100 % correlated. 
The SDL delay scan using ScanTool has an issue due to the incorrect motor movement. 
The manual delay scan has been attempted, which was not successful. 
 

EPS Interlock change for Mode30:
the 3 HIREX Interlock conditions had been disabled

The SASE1 HIREX interlock is not working as expected.

At the position 'OUT' (step 2 in HIREX scene) and while none of the motors are moving, the interlock SA1_XTD9_HIREX/VDCTRL/HIREX_MOVING is triggered, which prevents the use of more than two pulses.

SA1_XTD9_HIREX/VDCTRL/HIREX_MOVING remains in INTERLOCKED state while moving HIREX in (expected behaviour) and finally goes to ON state when HIREX is inserted, thus releasing the MODES and MODEM interlocks and allowing normal beam operation.

Found the delay time from upper and lower branches of SDL with a frosted-YAG.
The upper branch is -512.8 and the lower branch is -513.28.
The delay time difference is about 500 fs. 
The Mid SDL delay tuner should be investigated further more. 
The next step is find the spatial overlap on the Suna microscope and measure the fringes. 
 

optimized the SDL alignment

found timing of the upper (-520 ps) and lower branch (-514.5 ps) of the SDL

moved the upper branch by 3 ps (positive) and lost the beam on the merger crystal - difficult to get it back

optimization of seeding (still not as good as needed)

set position for the two color mode (difference 3-4 ev)

timing of the direct beam with diode and laser
timing of the direct beam with YAG and laser
alignment of the lower branch of the SDL
timing pf the lower branch beam with YAG and laser

issues:
intensity and spectral purity of the seeded beam not really good
alignment of the mirrors have been tricky (previous values did not work)
 

X-ray delivery

• 11.0 keV, 1-351 pulses @ 1.1 MHz, 300-1100 uJ.
• Continuously decaying average intensity through the day.
• Large intensity gradient with long trains.

Optical laser delivery

• 800 nm, 50 fs, 1-113 pulses @ 564 kHz.
• Stable delivery.

Achievements/Observations

• Completed detector programme.

Issues

• Difficulties with AGIPD online calibration. Solved by DOC/CAL.

## Shift summary night July 28th-29th

Achievements:
- we saw signal on both MCPs (with a voltage of around 1500 V). We used the MCPs to measure XAS at Cu L edge at different theta angles from 120 deg (specular to MCPs) to 70 deg (facing hRIXS). At grazing angles the spectrum is a bit distorted, but just to see the edge is perfectly fine. If there is a diode on the way, the MCP sees  still some fluorescence.
- we saw the direct beam at APD 8 with transmission 0.02 % and 55 V bias voltage.
- we saw signal also on diode 4 and APD5
- the detectors connected are: diode 2, diode 4, APD 5, MCP_BIG and MCP_SMALL
- we looked for signal at rixs on CoO, but it was too weak so we asked BKR to go to vertical polarization
- beam with vertical polarization was transported to the sample
- continie the optimization of hRIXS at Su and hr grating

Problems:
- XAS processor was not working, tried to change date source, but it didn't help.
- diode 6 could not see any signal, probably because it is obstractad by thte antenna back

Program for next shift:
 - finish optimization at Cu edge hr grating

- optimize for Fe, at this geometry or rotated hRIXS.

X-ray delivery

• 11.0 keV, 1-352 pulses @ 1.1 MHz, 600-1100 uJ.
• Even larger intensity gradient with long trains than yesterday.

Optical laser delivery

• 800 nm, 50 fs, 1 pulse.
• Stable delivery.

Achievements/Observations

• Finished AGIPD programme.
• Started JUNGFRAU programme.

Issues

• Poor beam delivery with more than a few bunches per train.

X-ray delivery
- 9.22 and 11.0 keV, 1-352 pulses @ 1.1 MHz, 600-1400 uJ.
- Large intensity gradient with long trains (>70% drop with 352 pulses @ 1.1 MHz).
- Very unstable delivery from 20:30 until 23:00.

Optical laser delivery
- 800 nm, 50 fs, 1-113 pulses @ 564 kHz.
- Stable delivery

Achievements/Observations
- Instrument alignment.
- AGIPD timing scan.
- AGIPD flat field measurement at 1.1 MHz.

Issues
- Twice more time required to collect AGIPD flat fields due to large intensity gradient in the train.
- XTD2 1.2 mm CVD unusable. Initially stuck in the beam, but could be retracted with the help of DOC/PLC OCD.

SASE1: Solid attenuator att5 is in error. When it is tried to move it out, the arm lifts, but does not reach the final position before the software time-out. We  increased the software time-out from 4 seconds to 7 seconds, which didn't help. We suspect that there is a mechanical problem that prevents the att5 actuator to reach the out position. 

SPB states that it is ok to leave the attenuator arm in over the weekend, because they run mostly detector tests and don't require full intensity.  

The control rack of the soft mono at SASE3 has some failure. Leandro from EEE will enter the XTD10 at 12:00. 

Beam will be interupted for SAS1 and SASE3.

Estimate to fix it (if we are lucky) is one hour. 

Udate 12:30: Problem is solved (fuse was broken, replaced, motors tested)

Update 13:30: Beam is still not back, because BKR has problems with their sequencer

In SASE2 undualtor cell 10 has issues. Suren K. will do a ZZ at 11:30 to fix it (if possible). Estimated duration: 1-3 hours. 

Update 12:30: The problem is more severe than anticipated. Suren needs to get a replacement driver from the lab and then go back into the tunnel at about 14:00 

In principle, the beam could be use dby HED until 14:00

Update 13:30: Beam was not put back, because energizing and de-energizing the magnets would take too much time. Whenever Suren is ready, he will go back into XTD1 and try to fix the problem. 

Udate 17:30: Suren and Mikhail could do the repair and finish now th zz. A hardware piece (motor driver) had to be exchanged and it turned out that the Beckhoff software on it was outdated. To get the required feedback from Beckhoff took considerable time, but now everything looks good.