the pulse energy in XTD10 is lowered by ~30% when SASE1 changes photon energy, compare att. 1 and 2.

In addition, the intra-train pulse energy stability gets much lower. Potentially, there is an impact on the pointing as well, which is critical for the pump-probe experiment.

changing SA3 mono from grating to blank while having the und to mono synchronization running apparently caused the und photon energy to change to 680eV. the synchronization MDL went into pink-disable when changing mirror settings, so this change in photon energy should not have occurred.

After going back to 940eV, the SASE level did not come back. BKR tried to tackle this for some while until they asked for intervention of the MRC.

SA3 GATT has trouble in setting the pressure at ~0.5mbar. setting any value between 0.5 and 0.6 will have it settle around 0.48.

It turns out the GATT cannot tune the pressure between 0.48 and 0.62mbar. tuning pressure continuously to keep transmission constant gets us in the need of that range eventually. the problem is that at 0.48mbar the valve V30740S is at 100%. the minimum opening of the next valve V307030S gets already 0.62mbar.

[edit simon, after talking Michaela]

we had the idea that one could use two of the MFCs (M.R.+L.R.) at the same time to extend the range of the low end. Indeed this does work but one has to make sure that Set Control Mode is 1! (att 1)

This, at least gives us a upper limit of the low range of 0.52 mBar (mind you, this is only for manual settings, parallel operation of MFCs is not forseen so far by the software)

Set Control Mode to 1 on U.R. MFC gives us a low end of 0.56 mBar on the upper range

around 6:15, the lights as the one shown in the attachment turned on by themselves in the control hutch. after some minutes, they switched off.

from the exp hutch camera, we realized that this happened in there as well, which impacted negatively on the running measurement. The pnCCD is sensitive to ambient light and we have to keep the hutch dark while measuring.

Why did these lights turn on?

problems with machine operation

very low yield at 1.8keV, took ~2hrs tuning time to get 600uJ (linear taper)

SA3 cells opened without us knowing when hv was changed

observed strong pointing change (and beam profile shape) when changing

- SASE3 pulse timing

- photon energy

pointing change with changing photon energy was such that the beam would make it through the GATT only partially (att. 1). this is unprecedented.

SPB_IRU_DPA/MOTOR issue

X stage looks okay, but Y, AX, and AY values have been changed by 2-3mm. (see attachment 1 and 2)

SPB_IRU_SLIT-1/MOTOR issue

All 4 blades (top, bottom, left, and right) have been changed by 0.1-0.5mm. (see attachment 3)

SPB_IRU_SIDEMIC/MOTOR and SPB_IRU_INLINEMIC/MOTOR issue

Not fully checked, but Y & Z motors of SideMic and AX & AY motors of InlineMic have been changed by ~1mm and ~0.4 karabo unit. (see attachment 4 and 5)

X-ray delivery

• 9.3 keV, 1-85 pulses, 1.3 mJ, stable delivery

Optical laser delivery

• 800 nm, 1-226 pulses, stable delivery except for shift change issues

Achievements/Observations

• PP laser alignment and optimization at IRU and PAM
• Aligned beam until IBS
• Checked MKB focus
• Timing at PAM
• First signals on GOTTHARD II

Issues

• Issues with shift change for PP laser. Intensity flucutation observed after shift change was done. This issue was similar to what was observed last year. We will inform LAS about this issue. No LAS OCD available to call before we leave after the shift (7:30 AM).

X-ray delivery

• 9.3 keV, 1-85 pulses, 1 mJ, stable delivery

Optical laser delivery

• 800 nm, 1-300 pulses, stable delivery

Achievements/Observations

• Optimization of ns laser for illumiation and PP laser polarization
• Optimization of X-ray beam alignment and scattering background on AGIPD
• Timing at IRU and PAM
• GOTTHARD II timing scan and data collection
• Pump-probe data collection at IRU

Issues

• No major issues

X-ray delivery

• 9.3 keV, 1-85 pulses, 1 mJ, stable delivery

Optical laser delivery

• 800 nm, 1-226 pulses, stable delivery
• ns laser for illumination

Achievements/Observations

• Successfull arrival time slope tests
• GOTTHARD II data collection
• Pump-probe data collection at IRU with arrival time slope

Issues

• No major issues

X-ray delivery

• 9.3 keV, 1-85 pulses, 1 mJ, stable delivery

Optical laser delivery

• 800 nm, 1-226 pulses, stable delivery
• ns laser for illumination

Achievements/Observations

• Successfull arrival time slope setting
• Pump-probe data collection at IRU with corrected time slope

X-ray delivery

• 9.3 keV, 1-85 pulses, 1 mJ, stable delivery

Optical laser delivery

• 800 nm, 1-226 pulses, stable delivery
• ns laser for illumination

Achievements/Observations

• Successfull arrival time slope setting
• Pump-probe data collection at IRU with corrected time slope

Issues

• No major issues

Shift summary 15.2.2023 (Wednesday)

X-ray delivery

• 9.3 keV, 1-200 pulses, 1.0 mJ, pulse energy fluctuation due to SA3 tunning & special operation mode (SCS)

Optical laser delivery

• No Laser

Achievements/Observations

• LPM and Calorimeter commissioning (efficiency of MKB system and CRL lens stacks checked)
• Recorded Micron Ptychography w/ Zyla Camera
• Install EHC Shimadzu
• Both Shimadzus train synchronised and recording properly to DAQ

Issues

• 10-15% pulse energy fluctuation due to SA3
• Zyla Failure
• Poor scattering efficiency on Zyla

X-ray delivery

• 9.3 keV, 1-120 pulses

Optical laser delivery

• No Optical Laser

Achievements/Observations

• EHC Shimadzu timing and focusing
• Two-Plane Measurements Tested
• SA1, NKB and EHC Shimadzu flatfields recorded
• Coherence measurement with EHC Shimadzu

Issues

• Bassler cameras misbehaving

X-ray delivery

•  9.3 keV, 1-120 pulses,
• good stabiltiy, lowish flux ~900uJ, but experimental requirements were met

Achievements/Observations

• Finished doule slit measurements at micron beam
• Alignment to direct beam
• Sample position for the sand paper found
• Some sand paper test speckle patterns measured

Issues

• Alignment was a bit painful without the NKB and EHC cameras - switch to ZYLA at EHC made ALAS alignment much easier
• diff pump does not transmit much of direct beam without interference and requries tight power slits (known limitation)

Instrument status

• AGIPD HV off.
• AGIPD gate valve closed and pinned.
• Attenuators set to thickest diamond.
• Vacuum valves closed.
• EHU PSLIT closed around direct beam to approx 1.2 x 1.2 mm
• sample moved up by 10mm so both rows accessible in direct beam
• current 'focus' sample position is approx location of sandpaper from evening measurement (lower row, darkside), 10mm in +x moves out of beam

To do for next shift

- continue direct beam speckle measurements (See entry elog:138)
- quite a bit of scattter on AGIPD from direct beam and especially sandpaper samples.
- transmissions of at least ~1 % level are detector safe (no pixels in AGIPD medium gain)

X-ray delivery

• 9.3 keV, 120 pulses
• Good Beam Stability -~1mJ

Achievements/Observations

• Double Slit and V-Pattern Interference Measurements
• Nearfield Ptycho-Scans
• Nano-KB (@Richard)

Issues

• Office network webcams extremely slow in control room
• X-ray delivery jddd display computer frozen again (related to ubuntu update?)

Instrument status

• AGIPD HV off.
• AGIPD gate valve closed and pinned.
• Attenuators set to thickest diamond.
• Vacuum valves closed.
• YAG in-beam in interaction region.

To do for next shift

• End of beamtime - Nearfield ptychography experiment not completed, may require time during the week
• NanoKB partially aligned  - see dedicated post

Staff: AR, KK

X-ray delivery

• 9.3keV

Optical laser delivery

• None

Achievements/Observations

• Both KB mirrors are moved to Ru coating
• Nano KB and inlineMic are aligned focus optimzed
• Several ptycho. datasets are measured with single-pulse and 320 pulses per train

In the public status display, it looks like FXE is taking the beam even though their shutter is closed.

X-ray delivery

• 9.3 keV, 1-352 pulses, 0.8 mJ, stable delivery

Optical laser delivery

• 800 nm, 1-01 pulses, 282 kHz, stable delivery
• ns laser for illumination

Achievements/Observations

• Alignment for NKB focusing setup were finished
• Al scattering signal was observed on AGIPD, need to move CSS with IRU-SLIT-1 opening
• Dammit currently running on the "AGIPD" PC, automated data processing is on but will only process the first 100k frames.

Issues

• No major issue to report

X-ray delivery

• 9.3 keV, 1-352 pulses, 0.8 mJ, stable delivery

Optical laser delivery

• 800 nm, 101 pulses, 282 kHz, stable delivery
• ns laser for illumination

Achievements/Observations

• Nanofocusing setup alignment was finished
• Ice detection was tested

Issues

• No major issue

X-ray delivery

• 9.3 keV, 202 pulses, X-ray intensity had slope over train, 30 % difference between first and last pulse in the train
• Sometime strange intensity slope was observed (screen shot was attached)

Optical laser delivery

• 800 nm, 68 pulses, 188 kHz, Treacy compressor issue, lost 3 hours in morning
• ns laser for illumination

Achievements/Observations

• Nanofocusing setup with pump-probe experiment has started
• Collected TR-SFX data

Issues

• Treacy compressor issue, lost 3 hours in morning
•  X-ray intensity had slope over train, 30 % difference between first and last pulse in the train
• Sometime strange intensity slope was observed  (screen shot was attached)
• Run_Controller stopped without any action from us