Shift summary, posted by Tokushi Sato on 29 Sep 2023, 23:13
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X-ray delivery
6.3 keV, 3-4 mJ/pulse, 1-352 pulses at 1.13 MHz
Optical laser delivery
PP laser, 1030 nm, 226 pulses at 1.1 MHz, stable delivery
ns laser for rayleigh scattering, stabe delivery
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 30 Sep 2023, 23:08
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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 |
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Shift summary, posted by Tokushi Sato on 01 Oct 2023, 23:06
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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 |
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Shift summary 11.10.2023, posted by Tokushi Sato on 12 Oct 2023, 02:00
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Staff: JK, CK, KL, AS
X-ray delivery
8.4 keV, up to 260 pulses at 1.1MHz, 3.5 mJ
Optical laser delivery |
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Shift summary, posted by Tokushi Sato on 16 Nov 2023, 06:56
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X-ray delivery
1.3-1.7 mJ, 10.7 keV, 1-100 pulses, stable delivery
Optical laser delivery
None
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 17 Nov 2023, 06:55
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X-ray delivery
1.3-1.7 mJ, 10.7 keV, 1-100 pulses, stable delivery
Optical laser delivery
None
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 18 Nov 2023, 06:42
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X-ray delivery
1.3-1.7 mJ, 10.7 keV, 1-100 pulses, stable delivery
Optical laser delivery
None
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 19 Nov 2023, 06:54
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X-ray delivery
1.3-1.7 mJ, 10.7 keV, 1-100 pulses, stable delivery
Optical laser delivery
None
Achievements/Observations |
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Shift summary, posted by Thomas Preston on 03 Jun 2023, 09:42
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X-ray parameters: 20 keV, 352 pulses, ca 300 uJ
running user samples.
experiment going overall well.
X-ray performance: |
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Pulse energy has dropped to ~50% from this morning, posted by Thomas Preston on 03 Jun 2023, 13:42
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03 Jun 2023, 13:46
We called the BKR to ask what they can do about our pulse energy being 50% (~160uJ and slowly dropping) of what it was since we made our hutch
intervention (with 0 bunches). BKR were asked to organise a time slot with PRC and the other instruments to make an intervention to try to increase our |
Issue, posted by Thomas Preston on 24 Oct 2023, 19:26 
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Vacuum issue at HED
At 18:26 the vacuum failed in the HED CRL3 chamber in the OPTs hutch. The vacuum failed in the section and tripped the valves in the OPT hutch;
it went from 1e-8 to 5 mbar in seconds. The leak is confined to the CRL chamber -- the sections upstream and downstream are not compromised and still have |
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SASE1 changing photon energy changes the 2-color setup in SASE3, posted by Thomas Baumann on 21 Feb 2023, 23:31
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We were set-up for 5.7 keV photon energy in SASE1. We made a test with BKR to change this energy to 9.3 keV. This had an effect on our two-color setup:
The first color pulse energy increased. See att 1. Green is the reference at 5.7 keV, blue is at 9.3 keV.
Att 2 shows the XGM history: pulse energy went up to 200 uJ in SQS XGMD during the change. |
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Summary: Night 13th and Day 14th, posted by Thomas Baumann on 14 Sep 2023, 16:49
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The late shift on the 13th fixed remaining problems with the DLD and the calibration pipeline.
The night shift was then able to collect data on O2 using the two-color mode. Systematic studies were done at different photon energies for both
colors. This was done for full FEL intensity and 10%. |
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Status, posted by Theophilos Maltezopoulos on 16 Jan 2023, 11:33
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| I started the upstream XGMs in XTD2, XTD1, and XTD10. |
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Issue, posted by Theophilos Maltezopoulos on 13 Oct 2023, 10:19
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An XGM has two single-shot detectors, XGMD and HAMP.
The XTD2 XGMD amplifiers are damaged, thus I operate the XTD2 XGM with HAMP, which I usually use at > 18 keV.
In summary, the XTD2 XGM is fully operational, but I do not have a spare detector any more! Thus, a ZZ is organized for Monday 16.10. around |
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Finding t0 with the PAM, posted by Terry Mullins on 21 Mar 2023, 19:35 7x
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After setting timing witht he diode, we look at the PAM spectrometer and scan the laser timing a bit. We found a clear change in the spectrum -
at >t0, the spectrum was very attenuated and at t<t0, the spectrum was larger. This persisted for many 10s of ps (very unexpected behaviour).
In attachment are the LA3 timing scene, the SQS delay stage, the BAM, and the spectrometer signal from Metro at t0. att. 1 - 4. The averaged |
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Night shift summary 02.03.2023, posted by Teguh, Luigi on 02 Mar 2023, 05:41
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Achievements:
1. Performed knife-edge scan. The beam size is currently at 5 um x 120 um.
2. Aligned the spectrometer at O K edge (2.8 pixel FWHM, 110 meV resolution, 4800 resolving power) |
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Night Shift Summary on 04.03.2023, posted by Teguh, Luigi on 04 Mar 2023, 07:00
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Achievements:
- Improved the vacuum of the chamber slightly
- Found the spatial overlap between FEL and jet |
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Night shift summary 05.01.2023, posted by Teguh, Luigi on 06 Mar 2023, 06:20
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Achievements:
1. Continued measuring time-resolved and static RIXS on water (run table in elog entry #103)
2. Periodically checked spatial overlap and BAM compensator in-between measurements. |
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Morning Shift Summary on 15.08.2023, posted by Teguh Citra Asmara, Eugenio Paris on 17 Aug 2023, 11:00
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Achievements
Start cooling down the sample
Align the beamline and deliver the beam into the sample
Performed knife edge scans
and enlarge the beam horizontal size to 350 um
Tuned the VHM bending by checking the hRIXS resolution
Performed energy calibration |