Shift summary, posted by Ulrike Boesenberg on 12 Jun 2023, 02:01
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*Some more tuning of HXRSS and focus optimization in the morning.
*XPCS data taken in WAXS geometry on different glass samples. |
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Shift summary, posted by Ulrike Boesenberg on 30 Jul 2023, 02:02
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9.3 keV, 1-35pulses, stable delivery ~600uJ
*General alignment of MID branch to the DES
*Commissioning of CRL2 (MID_XTD6_CRL) together with EEE after change to close loop in the maintenance period and alignment of lenses, characterization |
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Shift summary, posted by Ulrike Boesenberg on 30 Jul 2023, 23:06
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9 and 10keV beam, up to 30 bunches, significant drop in intensity in the morning and in the evening.
Activities:
Commissioning of EH MIRR device |
Stability Issue, posted by Ulf Zastrau on 02 Mar 2023, 22:54 
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HED would like to report that since 2 days the SASE2 beam is instable.
The attached movie shows, on the left (90° rotated, so up-down is left-right)
the beam at the end of the HED hutch, and on the right its the same beam |
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Shift summary, posted by Ulf Zastrau on 03 Mar 2023, 23:06
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Beam delivery SASE 8,25 keV, 1300 µJ. Intensity stable,
but beam jittery in horizontal.
PRC (Dommach) did a ZZ around 13:00 and switched off coolling of M1 in XD1, but no effect on beam jitter. |
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Shift summary, posted by Ulf Zastrau on 06 Mar 2023, 06:48
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X-ray delivery stable in intensity, 1300-1400 mJ at 8150 eV SASE.
user experiment 3430 (Zastrau / Mishchenko)
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End of Shift, posted by Trey Guest on 16 Feb 2023, 23:01
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Staff: KK, RB, TG, AS, CK
X-ray delivery
9.3 keV, 1-120 pulses,
Optical laser delivery |
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Stability Issue, posted by Tommaso Mazza on 24 Mar 2023, 18:27
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the pulse energy in XTD10 is lowered by ~30% when SASE1 changes photon energy, compare att. 1 and 2.
In addition, the intra-train pulse energy stability gets much lower. Potentially, there is an impact on the pointing as well, which is critical
for the pump-probe experiment. |
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Stability Issue, posted by Tommaso Mazza on 30 Apr 2023, 09:01
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changing SA3 mono from grating to blank while having the und to mono synchronization running apparently caused the und photon energy to change to 680eV.
the synchronization MDL went into pink-disable when changing mirror settings, so this change in photon energy should not have occurred.
After going back to 940eV, the SASE level did not come back. BKR tried to tackle this for some while until they asked for intervention of the |
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Issue, posted by Tommaso Mazza on 14 May 2023, 05:33
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SA3 GATT has trouble in setting the pressure at ~0.5mbar. setting any value between 0.5 and 0.6 will have it settle around 0.48.
It turns out the GATT cannot tune the pressure between 0.48 and 0.62mbar. tuning pressure continuously to keep transmission constant gets us
in the need of that range eventually. the problem is that at 0.48mbar the valve V30740S is at 100%. the minimum opening of the next valve V307030S gets |
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pointing stability, posted by Tommaso Mazza on 02 Jun 2023, 06:17
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we lost spatial overlap on several instances.
It seems that this happens when SASE2 changes number of pulses.
when we have SASE2 changing number of pulses, spatial overlap is lost and this goes with a change in the position read by the xgm in the order |
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Issue, posted by Tommaso Mazza on 05 Jun 2023, 06:45
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around 6:15, the lights as the one shown in the attachment turned on by themselves in the control hutch. after some minutes, they switched off.
from the exp hutch camera, we realized that this happened in there as well, which impacted negatively on the running measurement. The pnCCD is
sensitive to ambient light and we have to keep the hutch dark while measuring. |
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Shift summary, posted by Tommaso Mazza on 25 Aug 2023, 07:29
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problems with machine operation
very low yield at 1.8keV, took ~2hrs tuning time to get 600uJ (linear taper)
SA3 cells opened without us knowing when hv was changed |
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Shift summary, posted by Tokushi Sato on 12 Feb 2023, 06:53
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X-ray delivery
9.3 keV, 1-85 pulses, 1 mJ, stable delivery
Optical laser delivery
800 nm, 1-226 pulses, stable delivery
ns laser for illumination
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 13 Feb 2023, 07:17
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X-ray delivery
9.3 keV, 1-85 pulses, 1 mJ, stable delivery
Optical laser delivery
800 nm, 1-226 pulses, stable delivery
ns laser for illumination
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 28 Feb 2023, 23:24
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X-ray delivery
9.3 keV, 1-352 pulses, 0.8 mJ, stable delivery
Optical laser delivery
800 nm, 1-01 pulses, 282 kHz, stable delivery
ns laser for illumination
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 01 Mar 2023, 23:25
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X-ray delivery
9.3 keV, 1-352 pulses, 0.8 mJ, stable delivery
Optical laser delivery
800 nm, 101 pulses, 282 kHz, stable delivery
ns laser for illumination
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 02 Mar 2023, 23:13
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X-ray delivery
9.3 keV, 202 pulses, X-ray intensity had slope over train, 30 % difference between first and last pulse in the train
Sometime
strange intensity slope was observed (screen shot was attached)
Optical laser delivery |
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Shift summary, posted by Tokushi Sato on 03 Mar 2023, 23:27
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X-ray delivery
9.3 keV, 202 pulses, 564 kHz, intensity slope was flat
Optical laser delivery
800 nm, 68 pulses, 188 kHz. stable delivery
ns laser for illumination
Achievements/Observations |
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Shift summary, posted by Tokushi Sato on 04 Mar 2023, 22:55
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X-ray delivery
9.3 keV, 202 pulses, 564 kHz, intensity slope was fine
Optical laser delivery
800 nm, 68 pulses, 188 kHz. stable delivery
ns laser for illumination
Achievements/Observations |