X-ray delivery

• 6.3 keV, 3-4 mJ/pulse, 1-352 pulses at 1.13 MHz

Optical laser delivery

• PP laser, 1030 nm, 352 pulses at 1.1 MHz, stable delivery
• ns laser for rayleigh scattering, stabe delivery

Achievements/Observations

• Lots of datasets were collected using two different laser polarization (0 degree and 45 degree)
• During the data collections PP laser phase shifter delay step scans were used.
• PP laser time aligned to zero and spatial overlapped was checked.

Issues

• No major issue today

X-ray delivery

• 7.8 keV, up to 30 pulses at 94 kHz, 3 mJ

Optical laser delivery

• No laser

Achievements/Observations

• Trying to solve issues

Issues

• AGIPD's asics interlocked several times. Marcin was informed and he tried to solve the issue remotely but did not work.
• Marcin observed that the AGIPD's chiller temperature was increasing since afternoon and not going down below -16 degree. Probablly the chiller is no longer at proper state. Macrin was onsite and tried to solve the issue without success. Informed to detector group
• Difficulties with alignment of direct beam path until NKB

X-ray delivery

• 7.8 keV, up to 260 pulses at 1.1MHz, >4 mJ

Optical laser delivery

• PP laser was down since 00:48.

Achievements/Observations

• NKB focus optimized and beam cleaning partially done
• Damaged IRU slit-4 has been rearranged and replaced
• Stable AGIPD operation

Issues

• Beam on AGPID seems still too big and beam cleaning did not really work (we may need to close PSLITs during the next shift)
• IRU_SLITs are too close to the X-ray beam and one blade in IRU_SLIT-4 was damaged by X-ray
• ~10 pixels in Q2M1 overexposed
• SA1 PPL Amphos down since 00:48

X-ray delivery

• 7.8 keV, up to 260 pulses at 1.1MHz, ~3 mJ

Optical laser delivery

• PP laser, stable delivery

Achievements/Observations

• NKB focus optimized with reduced PSLIT (both MKB and EHU) opening
• Found the orgin of the BG (mostly from AGIPD gun shield)
• Stable AGIPD operation

Issues

• Beam slitting with PSLITs & IRU_SLITs does not help in reducing the BG from the AGIPD Gun-shield
• Placing additional Pb shield on the injector tip does not help (BG source is in between injector and AGIPD)

• the initial 600-700 uJ of pulse energy at the beginning of the user beamtime dropped down to 300-350 uJ over night from 14th to 15th. The operators did not seem to be able to bring the pulse energy above 500 uJ, which is where it was after the RC's intervention in the morning. Is it possible to bring up the energy in the morning?

X-ray delivery

• 13.6 keV, ~1.6 mJ and up to 202 pulses at 0.5 MHz

Optical laser delivery

• PP laser, stable delivery

Achievements/Observations

• User sample delivery tested
• M1 and M2 aligned
• x-ray beam aligned and focused
• PP laser spatial and temporal alignment done
• AGIPD background reduction to be optimized: still one photon diffuse scattering and ten photons scattering on the top right quadrant

Shift summary (p4239)
Achievements:
- HXSS beam at 10.5 keV at 400 uJ pulse energy
- MID beam alignment to DES
- aligned DES spectrometer for C220 reflection on Gotthard and flight path;
Issues:
-    Seeding crystal was stuck in parked position and could not be inserted back (late evening); to be investigated via ZZ access tomorrow

X-ray delivery

• 13.6 keV, ~1.8 mJ and up to 352 pulses at 1.1 MHz

Optical laser delivery

• PP laser, amphos laser computer in error for ~2h

Achievements/Observations

• x-ray beam aligned and focused
• PP laser optimization done
• AGIPD background reduced to 1-2 photons diffuse scattering

Issues

• Beam down ~2h
• PP laser down for ~2h
• AGIPD tripped due to pressure spike, currently all off

X-ray delivery

• 13.6 keV, ~1.6 mJ and up to 352 pulses at 1.1 MHz.
• Beam down at 22:47, not recovered before the end of the shift. Otherwise stable delivery.

Optical laser delivery

• 800 nm, 50 fs, 1 to 176 pulses at 564 kHz pumping TOPAS at 475 nm.
• Intensity modulations through the burst during the second half of the day. Solved by LAS OCD. Otherwise stable delivery.

Achievements/Observations

• Remounting of diagnostics stack under the injector.
• PP laser and X-ray spatial and timing overlap.
• Collected data from noon until beam down towards the end of the shift.

Issues

• Discrepancies between delay calculated by OpticalDelay device and motor encoder position appearing from time to time.
• Karabo GUI crashed twice when after pressing enter while editing a table.

X-ray delivery

• 13.6 keV, ~1.6 mJ and up to 352 pulses at 1.1 MHz.
• Beam down until around 1PM.
• After agreement with FXE, we could collect data until midnight.

Optical laser delivery

• 800 nm, 50 fs, 1 to 176 pulses at 564 kHz pumping TOPAS at 475 nm.
• PP laser down for ~4h. Facility cooling water for the AMPHOS chiller was down, solved by LAS and TS OCD (controller had to be replaced).

Achievements/Observations

• PP laser and X-ray spatial and timing overlap.
• Collected pump-probe data ~1.5h until PP laser down, then dark data on a different sample and then again ~1.5h pump-probe at the end of the shift

Issues

• Beam down in the morning.
• PP laser down in the evening.

Morning shift Summary 22.10.2023

Achievements

• Checked beam alignment and overlap

• confirmed sample integrity with static rixs on other sample locations
  Problems

• beam down after 11 am. No chance to resume till at least 18:00h

Milestones:
*Finish measurement program on the STO sample at room temperature
*Check mono fpitch and energy rocking curve
*Darks for AGIPD and JF
*take out mono, CRLs etc from the tunnel

Beam delivery:

*Beam was not available from 11:30 to 19:30. Returned to good conditions back at  ~2mJ, 10.5keV, 15bunches

X-ray delivery

• 13.6 keV, ~1.6 mJ and up to 352 pulses at 1.1 MHz.
• Beam down from 10:30 to 19:00.

Optical laser delivery

• 800 nm, 50 fs, 1 to 176 pulses at 564 kHz pumping TOPAS at 475 nm.
• Stable delivery.

Achievements/Observations

• PP laser and X-ray spatial and timing overlap.
• Collected data for ~7.5h.
• Very stable sample delivery.

X-ray delivery

• 7.8keV, 2.4mj, stable delivery, homogeneos intra train energy most of the time.

Optical laser delivery

• ns laser for particle imaging

Achievements/Observations

• AGIPD BG optimized by opening Q2 & Q4 quadrants a few pixels and adding Pb shield on IRU_SLIT4
• NKB focused optimized
• Data (75 nm Ag cube) and gas BG (no sample) measured with two different gases (N2 and He)

Issues

• AGIPD BG near the center (1-2 pixels) were quite strong even with tight sliting, but issue solved by opening two quadrants (Q2 & Q4) and moving CSS about 1-2 pixels (elog:12731)
• Found additional AGIPD BG in Q2M1 module (mid-Q range), but issue solved by adding Pd shield on IRU_SLIT4 (elog:12734)

X-ray delivery

• 7.8keV, 2.5mj, stable delivery, homogeneos intra train energy most of the time.

Optical laser delivery

• ns laser for particle imaging

Achievements/Observations

• RGA installed and used for quantitative gas BG analysis
• Data (55 nm Ag cube) and gas BG (no sample) measured with two different gases (N2 and He)
• BG roughly 3.5x better with 3 l/min He flow, but only about 2x better with 3 L/min He + N2/CO2 for stable Tayler cone

Issues

• Pulses often changed from 352 to 28 for no apparent reason, discovered later that it was happening when closing silicon 500 XTD2 arm (elog:421)

Beam parameters: 18 keV, 1 pulse, 600 uJ

- user beamtime started Friday, the 27th and going smoothly until now and we are in data collection mode

- shock compression setup with XRD and DiPOLE

- machine performance very stable in pulse energies with little downtimes

X-ray delivery

• 7.8keV, ~2.5mj, no beam before 1:15am
• One undulator was not moving, expert was called

Optical laser delivery

• ns laser for particle imaging

Achievements/Observations

• RGA used for quantitative gas BG analysis
• Collected more data from 55 nm Ag cube
• Collected some sucrose data
• Collected gold bipyramids data

Issues

• Could not get sucrose droplets delivered to the interation point while injecting He at the bottom of the skimmer. As soon as it was enough He to decrease N, droplets desappeared.
• Still some questionmarks regarding the gas flows through the skimmer section into the chamber. More tests in the lab necessary.

X-ray delivery

• 19keV, 700-800uj

Optical laser delivery

•  ns laser

Achievements/Observations

• Vacuum pipe and He pipe for diamond outcoupling installed
• Aligned beam to downstream
• Saw the beam at tower position (Zyla camera)

• stable delivery of 1mJ at 18keV SASE
• succesful beamline alignment for MID (CRLs + M1 and M2) with mono.
• alignment of NAFO stack to DES and zyla camera with SASE and monochromatic beam
• setup of DES spectrometer for 18keV on 440 reflection with SASE
• timing of PP laser with perpendicular excitation condition with diode and YAG

Problems:
Mirror M2 needs 30min to move from SASE to Mono position