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)