 Sat Apr 4 17:32:01 2020, Ragan, Alex, Esther, General, No beam in ESR
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The beam is coming from SIS but doesn't arrive in ESR because the quadrupole magnets in ESR have failed.
Update (18:01): Problem has been resolved. |
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Sat Apr 4 18:57:49 2020, Ragan, Alex, Esther, General, Timing problem with SIS & ESR and problems with stacking
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There are further problems with beam stacking in ESR. It works occasionally but keeps failing.
There is also timing problem between SIS and FRS. |
Sat Apr 4 22:31:02 2020, Alex, Esther, General, Beam in ESR lost 
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The beam in ESR was lost suddenly at ~22:20 due to a power supply failure of the quadrupoles.
Update (~20:40): Failure was resolved and new stacking started. |
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Mon Apr 6 20:03:50 2020, Ragan, General, Experiment finished ))
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E121 experiment is finished with the last 10 hours measurement at 19:47 ))
Many thanks to everyone for there significant contributions )) |
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Thu Apr 9 11:16:35 2020, Ragan, General, Measurements done in the experiment
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Mon Apr 20 11:17:18 2020, Ragan, General, Logbook
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Sun May 30 12:09:00 2021, Ragan, General, NTCAP
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Attached is the info given by Carsten.
The instructions to operate NTCAP are given on https://wiki.gsi.de/ESR_EXP/ManualOfNTCAP |
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Wed Dec 5 17:29:24 2018, Chen, Sidhu, Detectors, signal map 13x
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[B]Description:[/B]
Here is a summary of signal map. The charged particle detector includes 6 layers of Si-Pad, 1 DSSD and 1 CsI.
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Mon Dec 10 11:59:15 2018, Chen, Sidhu, Detectors, Test of shaping amplifier.
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[IMG]elog:6/1[/IMG]
[IMG]elog:6/2[/IMG]
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Tue Aug 27 14:53:47 2019, Chen, Sidhu, Detectors, The thickness uncertainty of Ta is less than 1%.
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The thickness of Ta plate have been measured by target group. The result is show as following.
According to this measurement, the thickness uncertainty is less than 1%.
This thickness uncertainty is good enough for Tl experiment.
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Thu Oct 24 15:36:13 2019, Chen, Sidhu, Detectors, Detector installation process
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[IMG]elog:12/1[/IMG]
[IMG]elog:12/2[/IMG]
[IMG]elog:12/3[/IMG] |
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Thu Feb 27 14:04:12 2020, Ruijiu Chen, Detectors, Remote control of HV module
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Be careful. The voltage value on user interface is 10 times of real value. e.g. if the real value is 32V, the voltage value on UI has to be 320V.
[IMG]elog:17/1[/IMG] |
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Sat Mar 28 04:32:15 2020, Ragan, Detectors, Ionisation events on DSSSD
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XY co-relation of DSSSD showing 206Pb82+ beam hitting the CsISiPHOS detector present in the inner pocket of ESR after the first dipole after the gas jet.
206Pb82+ is
produced by ionisation of
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Sat Mar 28 04:50:34 2020, Ragan, Detectors, MWPC
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Alex and Pierre-Michel applied 1500 V to the anode and adjusted the threshold in Messhute.
x1 signal was small & noisy and rest of the signals were fine. |
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Sat Mar 28 11:00:14 2020, Ragan, RuiJiu, Mei, Yuri, Tino, Detectors, Movement of detector
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10:51 am the CsISiPHOS is moved to 65 mm from 60 mm.The spot on the DSSSD is changed by 5 mm which confirms the hit of the beam.
11:05
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Sun Mar 29 09:57:26 2020, ruijiu, Detectors, the HV of charged particle detector
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MHV1 MHV2
ch1:1st Sipad 4th
Sipad
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Mon Mar 30 13:40:57 2020, ruijiu, Detectors, HV of Inner detector
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Mon Mar 30 13:41:20 2020, ruijiu, Detectors, HV of Inner detector
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Mon Mar 30 14:48:02 2020, ruijiu and Tino, Detectors, The leakcurrent of SiPad is over the setting limit.
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Because the
leakcurrent of
6 Sipads is
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Mon Mar 30 15:03:58 2020, ruijiu Tino, Yuri, Lasoro, Nik and Uli, Detectors, the gas bottle is empty.
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The gas bottle was empty. Tino replaced
the previous old bottle with 50 bar gas left.
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