Staff: JB, PV, TS, RL, RdW, JK, AR

X-ray delivery

• 1-165 pulses, 1.1 MHz, upto 400  uJ @ 50 pC

Optical laser delivery

• ns laser for imaging

Achievements/Observations

• NKB focus optimization
• Beam alignment until IBS
• Photodiode alignment
• Alignment of fixed target in the beam
• Tests with fixed target motion in vacuum
• Collected few runs with low transmission at 8 keV and 9 keV

X-ray delivery

• 9 keV 1 to 165 pulses ~ 300 mj per pulse - stable delivery during the day

Optical laser delivery

• ns lasers for illumination only

Achievements/Observations

• Focus alignment
• found illumination / shield (100 micron) conditions to optimise background on detector
• observed that the flourecence signal on the diode was very low and this appears corelated with drift in the focus - after focus optimisation signal was again visible
• several runs collected with varying attenuation with the aim to try to corelate flourecence signal on diode with beam intensity

Issues

• Too high background from sample at full transmission required exchange of copper shield form 50 to 100 microns
• disc detaching from motor spindle (twice) - first time disc blocked gate valve, second bolt and washer are in the gate valve mechanisme space
• in both cases detector had to be warmed to allow venting.

X-ray delivery

• 1-165 pulses, 1.1 MHz - 28.2 kHz, upto 400  uJ @ 50 pC

Optical laser delivery

• ns laser for imaging

Achievements/Observations

• Optimized sample setup for data collection
• Calibrated photodiode @ 8keV.
  • ADC signal was saturated with amplified photodiode signal.
  • Removed the amplifier and calibrated photodiode again.
  • ASE signal is visible without the amplifier
• Optimized ASE signal by optimizing the focus and target position in focus
• Checking and optiming the focus everytime chaning the sample disk seems to improve the signal
• Collected data at 8 keV and 9 keV for about 1-2 hours

X-ray delivery

• 1-165 pulses, 1.1 MHz - 28.2 kHz, upto 350  uJ @ 50 pC

Optical laser delivery

• ns laser for imaging

Achievements/Observations

• Collected data for 3 to 4 hours with different samples
• Data collection at lower repetiton rate (113 kHz) with less number of pulses

X-ray delivery

• 1-165 pulses, 1.1 MHz - 56.4 kHz, upto 350  uJ @ 50 pC

Optical laser delivery

• ns laser for imaging

Achievements/Observations

• Collected data for 3 to 4 hours with different samples
• Data collection at lower repetiton rate (113 kHz) with less number of pulses
• Data to characterize the divergence of ASE collected

X-ray delivery

• 1-165 pulses, 1.1 MHz - 56.4 kHz, upto 350  uJ @ 50 pC

Optical laser delivery

• ns laser for imaging

Achievements/Observations

• Collected data for about 6 hours with different samples
• Data collection at lower repetiton rates with less number of pulses
• Data to characterize the divergence of ASE collected
• Photodiode calibrated at 8 keV again

End of Diamond Sensor Study

We leave the SASE2 beamline in the following safe state:

• Pre-Abs inserted
• Solid ATT with T=0.001
• All CRLs OUT
• All imagers OUT

posting for 17th June

Staff: AR, AS, FK, HH, JB, KK, DZ, MK

X-ray delivery

• 12.4 keV, 1.4 mJ

Optical laser delivery

• 532 nm, ns-laser for sample pumping

Achievements/Observations

• Continued to collect data many hours of data collection

Issues

• coupling with SASE2 limited feedbacks to control slope across train, this led to dificulties in alignment and lost time to correct for poor visualisation of the beam.
• After discussion SASE2 kindly gave permission to BKR to corect the slope to facilitate our alignment
  • we also with the help of PRC arranged for the same arrangment for alignment for sunday

X-ray delivery

• 12.4 keV, up tp 352 pulses but the intensity drop across the train was too dramatic to use. reasonably stable delivery with 202 pulses.

Optical laser delivery

• none

Achievements/Observations

• reestablished direct beam trajectory and verified instrument alignment
• collected flat field calibration for AGIPD-1M for all high priority scenarios and some additional settings (see table copied in SPB commissioning or original AGIPD log)

X-ray delivery

• 9.3 keV, ~ 2 mJ, stable delivery except for the intensity slope along the train (fixed later on)

Optical laser delivery

• ns laser for imaging

Achievements/Observations

• Aligned the instrument for MKB focus configuration
• Optimzed MKB focus and detector background
• PCS - Collected data for about 3-4 hours with different sample concentration and crystal sizes.

Issues

• Issue with intensity slope along the pulse train (fixed later in the day)
• Issue with MKB combined motion (DOC informed)

X-ray delivery

• 9.3 keV, up to 181 pulses at 564 kHz, 1.8 - 1.9 mJ

Optical laser delivery

• PP Laser, 800nm, 50 fs, up to 181 pulses @ 564 kHz and 91 pulses at 282 kHz, stable delivery

Achievements/Observations

• Installed and aligned fixed target for pump-probe measurement
• Measured t0 with fixed target at IRU, scan tool to measure t0 was also tested
• Optimized Bimuth fixed target sample for diffraction condition
• Recorded pump-probe data (30 min 1 hour)
• Spatial and temporal overlap of X-ray and PP laser at PAM

Issues

• Issue with homing smaract stages used in fixed target. Solved by exchanging the stages for now but need to be checked later.
• Difficulties in observing pump-probe signal in online data analysis although diffraction signal could be seen and optmized on the fluorescent paper on DN500 and AGIPD detector
  • Data collected for further offline analysis

X-ray delivery

• 9.3 keV, up to 181 pulses at 564 kHz, 8 - 1.3 mJ
• Issue with pulse energy stability along the pulse train in the morning but optimzed later on in the day

Optical laser delivery

• PP Laser, 800nm, 50 fs, up to 181 pulses @ from 10 Hz to564 kHz

Achievements/Observations

• Optimized Bismuth diffraciton condition on AGIPD
• Collected pump-probe data with Bismuth fixed target
• Aligned PAM and measured arrival time with electron bunch arrival time slope enabled
  • Positive slope and V shape slope measured

Issues

• Issues with beam stability and intenisty.
  • Optimized later on in the day
  • But did not recover what we had yesterday in terms of pulse energy

X-ray delivery

• 7 keV, 2.1 mJ, stable delivery

Optical laser delivery

• None

Achievements/Observations

• M1, M2 pre alignment for this weeks beamtime
• Checked the beam trajectory through MKB mirrors after stripe change

Issues

• It seems that with wider funnel for the catcher, the YAG is not reaching the X-ray beam

Note: At 7 keV with 100 pulses, and full beam we were at 2.2 W average power.

Staff:JK, RDW, AR

X-ray delivery

• 7 keV 202 pulses 1.7mJ stabel across train and throughout the shift

Optical laser delivery

• N/A

Achievements/Observations

• faster changover and alignment
• almost 6 hours of data aquisition - many good hits observed
• strong diffraction in Hits required transmission to be reduced to 34%

Issues

• maintaining synchronnisation for droplet overlap proved difficult effective hit rate of 0.3% observed
• hits observed in beats as timing passed though overlap quite often - some periods where we could see hits in nearly every train but this could not be maintained.

End of Euler shift: all 3 SASE2 mirrors are now working with the Euler MDL.

We left the beamline aligned to HED, with M1,M2 on Pt for upcoming HED experiment at 18 keV.

Pre-absorber closed, CRL1 out, Solid attenuater with some diamonds.

X-ray delivery

• 13.6 keV, ~1.7 mJ and up to 352 pulses at 1.1 MHz

Optical laser delivery

• PP laser, 1 to 202 pulses, stable delivery except for the down time of ~1h

Achievements/Observations

• user sample data collected for ~1.5h
• PP laser timing scans done
• new adapter for the screens holder designed, machined and installed

Issues

• sample was growing on the adapter, preventing data collection
• new adapter is too far downstream, partially shadowing sample diffraction on the lower corners of the detector
• PP laser down for ~1h

X-ray delivery

• 1.3-1.7 mJ, 1-30 pulses, stable delivery

Optical laser delivery

• None

Achievements/Observations

• Aligned beam trajectory for 10.7 keV direct beam
• Optimized the microscopy table position and references
• Initial alignment and test of test of spectrometer crystal

X-ray delivery

• 1.3-1.7 mJ, 10.7 keV, 1-100 pulses, stable delivery

Optical laser delivery

• None

Achievements/Observations

• Installation of imaging optics and alignment

Issues

• No major issue today

Staff: AR, MS, DM, RL, RdW

X-ray delivery

• 16.9 keV, up to 30 pulses and 1.1 MHz for alignment, 1 pulse for data collection
• stable delivery

Optical laser delivery

• None

Achievements/Observations

• Beam aligned down to zyla cam 3
• CRLs were inserted but created too much speckles on Jungfrau and we couldn't reach the expected 80 um beam size for the users lenses (arms 6 and 7 unusable, arm 4 hole feature in beam)
• user lenses aligned
• User beamstop installed to block 1st order line in horizontal direction
• Collected several speckle tracking data scans without our CRLs - to give initial estimates for focus
• Jungfrau timing confirmed - signal observed

Issues

• Could not see signal with the thin sample and the CRLs inserted
• clear aberations from our CRLs
• CRL arm 4 motors were not moving. To recover it, we connected the motor and encoder cables from the pinhole arm.

Staff: AR, MS, DM, KK, RL, RdW

X-ray delivery

• 16.9 keV, up to 30 pulses and 1.1 MHz for alignment, 1 pulse for data collection
• 900 uJ
• Beam down around 1h

Optical laser delivery

• None

Achievements/Observations

• XTD2 lenses were realigned
• Crystal diffraction data from lysozyme and MOF collected with detector close up

Issues

• Beam down around 1h
• Once again we lost connection to JF4M module 01 requiering reset of receivers.