Shift summary, posted by Romain Letrun on 04 Jun 2023, 21:17
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X-ray delivery
12.2-12.45 keV, up to 339 pulses at 1.13 MHz, 0.8-1.2 mJ.
Couple of minutes beam interruption.
Optical
laser delivery |
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Shift summary, posted by Romain Letrun on 05 Aug 2023, 08:20
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X-ray delivery
9.3 keV, 1-202 pulses at 1.13 MHz, 1.9-2.1 mJ.
Overall stable delivery.
L-IBFB could not be activated due to missing
missing transfer matrix elements. Missing parameters entered by the expert who happened to be on shift this morning.
Optical |
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Shift summary, posted by Romain Letrun on 10 Aug 2023, 07:22
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X-ray delivery
9.3 keV, up to 181 pulses at 564 kHz, ~1.8 mJ. Overall stable delivery.
Optical laser delivery
800 nm, 50 fs, 564 kHz, up to 185 pulses. Overall stable delivery.
Achievements/Observations |
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Shift summary, posted by Romain Letrun on 11 Aug 2023, 07:16
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Shift summary for 10.8.2023
X-ray delivery
9.3 keV, up to 181 pulses at 564 kHz, 1.8 - 1.9 mJ
Optical laser delivery |
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Shift summary, posted by Romain Letrun on 12 Aug 2023, 07:12
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Shift summary for 11.8.2023
X-ray delivery |
Issue, posted by Romain Letrun on 12 Aug 2023, 07:19 
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| Potentially damaged 1.2 mm CVD in XTD2 attenuator. This feature was not present earlier in the week. |
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Shift summary, posted by Romain Letrun on 27 Sep 2023, 07:24
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Shift summary for 26.9.2023
X-ray delivery
6.3 keV, ~4 mJ, 1-352 pulses at 1.13 MHz
Great performance and stable delivery with few minor interruptions
Optical |
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Shift summary, posted by Romain Letrun on 28 Sep 2023, 07:20
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Shift summary for 27.9.2023
X-ray delivery
6.3 keV, 3-4 mJ/pulse, 1-352 pulses at 1.13 MHz
Optical laser delivery |
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Shift summary, posted by Romain Letrun on 29 Sep 2023, 08:30
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Shift sumary for 29.9.2023
X-ray delivery |
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Issue, posted by Romain Letrun on 30 Sep 2023, 10:11
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On multiple occasions this morning, the number of bunches was reduced to 1 without actions from our side.
Looking at the history of SA1_XTD2_BUNCHPATTERN/MDL/CONFIGURATOR, we noticed changes were applied by this device, presumably originating from
one of the watchdogs in SA1. This kind of silent changes is particularly inconvenient and could be easy to miss if one is not constantly monitoring that |
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Shift summary, posted by Romain Letrun on 20 Oct 2023, 23:10
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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 |
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Late shift summary 17.03.2023, posted by Robert, Zhong, Manuel on 17 Mar 2023, 23:43
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Activities:
continued tr-RIXS scans
tried to find ways to mitigate the energy drifts of the mono (see below)
confirmed in user
data that the FEL-PPL timing was not changing (see below)
setting up for tr-RIXS at beginning of night shift
Problems: |
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Shift summary, late 2023.03.15, posted by Robert, Manuel on 16 Mar 2023, 00:26
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Activities:
Found coarse and fine timing between FEL and PPL at 266nm
Set up for tr-RIXS during the night
Problems:
2 fastADC channels appear to be dead.
Optical locking of the PPL syncronisation system took a very long time (> 30 minutes)
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Late shift summary 19.03.23, posted by Robert Carley on 20 Mar 2023, 01:24
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Activities:
Measured tr-RIXS spectra on user sample in silane solvent
Problems:
Sometimes the PPL shutter cannot be opened from the control room after searching the hutch.
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Late shift summary20.04.2023, posted by Robert Carley on 21 Apr 2023, 04:05
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Activities:
correctly positioned magnet
moved detector upstream and found small beamstop
Recorded SAXS
Started tr-SAXS
Problems:
The SAXS images from laser-excited samples showed unexpected variation between different size rings, central point (ie not a ring) and |
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Night shift summary 20-21.04.2023, posted by Robert Carley on 21 Apr 2023, 04:13
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Activities:
Investigated SAXS scattering instability and found it to come from the pointing variation of the PPL
Recorded microscope images
of the PPL spot of the pBN to quantify the pointing for different spot sizes
Enlarged the beam and measured pumped SAXS. Results seem better |
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Night shift summary , posted by Robert Carley on 11 Jun 2023, 07:40
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achievements
optimized EOS signal from FEL-induced THz emission from STE on Sa of PAM
reduced chirp to increase timing sensitivity to 9fs
/ pixel of PAM
STE-based PAM measurements at fixed delay and delay scans.
after FEL down at 6am, continue with PAM measurements |
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Early shift summary, posted by Robert Carley on 11 Jun 2023, 17:34
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Achievements
Observed first EOS of THz emitted from FEL-pumped STE on SiC and Si membranes
Explored fluence dependence and damage limits
Explored
sample heating with pulse repetition rate
Measure timing jitter of FEL with and without longitudinal feedbacks engaged
Problems |
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Late shift summary, 26.10.2023, posted by Robert Carley on 26 Oct 2023, 23:25
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Achievements:
Continued with tr-RIXS
No problems
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Shift summary, posted by Richard Bean on 19 Feb 2023, 00:34
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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 |