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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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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Issue, posted by Chan Kim on 02 Feb 2023, 06:37
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SPB_IRU_DPA/MOTOR issue
X stage looks okay, but Y, AX, and AY values have been changed by 2-3mm. (see attachment 1 and 2)
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Shift end, posted by Jayanath Koliyadu on 09 Feb 2023, 07:14
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X-ray delivery
9.3 keV, 1-85 pulses, 1.3 mJ, stable delivery
Optical laser delivery
800 nm, 1-226 pulses, stable delivery except for shift change issues
Achievements/Observations |
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Shift end, posted by Jayanath Koliyadu on 10 Feb 2023, 08:17
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X-ray delivery
9.3 keV, 1-85 pulses, 1 mJ, stable delivery
Optical laser delivery |
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Shift end, posted by Jayanath Koliyadu on 11 Feb 2023, 07:06
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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 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 Chan Kim on 16 Feb 2023, 07:17
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Shift summary 15.2.2023 (Wednesday)
X-ray delivery
9.3 keV, 1-200 pulses, 1.0 mJ, pulse energy fluctuation due to SA3 tunning & special operation mode (SCS)
Optical |
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Shift summary, posted by Chan Kim on 16 Feb 2023, 23:15
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X-ray delivery
9.3 keV, 1-120 pulses
Optical laser delivery
No Optical Laser
Achievements/Observations |
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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 |
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Shift summary, posted by Richard Bean on 19 Feb 2023, 23:28
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X-ray delivery
9.3 keV, 120 pulses
Good Beam Stability -~1mJ
Achievements/Observations
Double Slit and V-Pattern Interference Measurements
Nearfield Ptycho-Scans
Nano-KB (@Richard)
Issues |
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Shift summary, posted by Adam Round on 24 Feb 2023, 05:39
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Staff: AR, KK
X-ray delivery
9.3keV
Optical laser delivery |
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Issue, posted by Romain Letrun on 28 Feb 2023, 07:17
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| In the public status display, it looks like FXE is taking the beam even though their shutter is closed. |
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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 |