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.  

this morning, ZZ was done together with Sylvia Huynh (EEE) to solve softmono pre-mirror motor issue https://redmine.xfel.eu/issues/177392

The issue was solved and also mechanical functionality of the stage was checked.

After ZZ, the beamline remained interlocked. Hutches will be searched and closed tonight to allow final checks on Tuesday

Beam is now aligned back to HED for hand-over to Naresh (see picture)

points achieved:

-vibometer measurements on M2 at high energy, 2,1 and 3 mrad setting

-tried again to find beam through pblm grating, but no success

We plan to put the piezos of M2 off, in the (unprobable) case that this is the reason of the "jumps" in SASE3 trajectory.

Therefore, I measured the change on RY and RZ motors, to correct all the positions

Fig 1: initial position, Motors Ry=10.5425 and RZ=-14.7200  Piezo Ry =5 and Rz=5

Fig 2: Ry is compensated, Motors Ry=10.4990 and RZ=-14.72  Piezo Ry =0 and Rz=5

Fig 3: Rz is compensated, Motors Ry=10.4990 and RZ=-14.7574  Piezo Ry =0 and Rz=0

Differential values: RY needs to be adjusted by -0.0435 and Rz by -0.0374

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)

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)