 Sun Mar 15 15:08:44 2020, Jan, Calibration, run035 - Xray145 calib B133 high rate,
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measurement with old tennelec specAmps, do not use for efficiency!
Detector: 145
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Sun Mar 15 17:12:40 2020, Laszlo, Jan, Detectors, new Ortec spec amps ,
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We are now using new SpecAmps for the x-ray detectors from ORTEC, they deliver much improved resolution but have other strange effects as discribed in the
next entry. |
Sun Mar 15 17:13:21 2020, Laszlo, Jan, Calibration, the x-ray gate issue, 
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We found a strange behaviour of our ADC gates for the x-ray detectors.
The setting as shown in the foto below corresponds to a delay of 5 us and a gate length of 15 us.
This is the only setting that produces nice spectra, even though the signals and gate are not aligned.
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Sun Mar 15 17:14:08 2020, Laszlo, Calibration, run036 - Xray90 calib Am241, distance 200!,
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Detector: 90
Source: Am241
Distance: 200mm
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Sun Mar 15 17:33:17 2020, Laszlo, Calibration, run037 - Xray90 calib Am241,
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Detector: 90
Source: Am241
Distance: 167.5mm
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Sun Mar 15 17:50:42 2020, Laszlo, Calibration, run038 - Xray90 calib Ba133, high rate,
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Detector: 90
Source: Ba133 - high rate
Distance: 167.5mm
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Sun Mar 15 18:09:19 2020, Laszlo, Calibration, run039 - Xray90 calib Ba133,
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Detector: 90
Source: Ba133
Distance: 167.5mm
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Sun Mar 15 18:53:42 2020, Laszlo, Calibration, run040 - Xray145 calib Am241,
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Detector: 145
Source: Am241
Distance: 305mm
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Sun Mar 15 19:22:58 2020, Laszlo, Calibration, run041 - Xray145 calib Ba133 - high rate,
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Detector: 145
Source: Ba133
Distance: 305mm
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Sun Mar 15 19:46:34 2020, Laszlo, Calibration, run042 - Xray35 calib Ba133 - high rate,
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Detector: 35
Source: Ba133, strong source
Distance: 334mm
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Sun Mar 15 20:26:08 2020, Laszlo, Calibration, run043 - Xray35 calib Am241,
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Detector: 35
Source: Am241
Distance: 334mm
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Sun Mar 15 21:01:23 2020, Laszlo, Calibration, run044 - Xray35 calib Ba133 - a night long run ,
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Detector: 35
Source: Ba133
Distance: 334mm
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Mon Mar 16 15:15:22 2020, Jan, Calibration, Gamma- and X-ray intensities for efficiency calib,
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Intensities for special gamma or x-ray lines needed for efficiency calibration can be found here:
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Tue Mar 17 08:15:49 2020, Jan, General, current grids & screen in TE ,
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| measured beam diagnosis with 124Xe48+ at 326 MeV/u |
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Tue Mar 17 11:44:58 2020, Jan, Runs, run entry - template ,
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beam: 118Te52+
energy: 7.4 MeV/u
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Wed Mar 18 09:53:28 2020, Laszlo, Jan, General, vacuum after opening gate valve,
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Gate valve to DSSSD setup was opened on Tue 17.03. ~9:00
The vacuum on Wed 18.03. ~9:00 was
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Thu Mar 19 09:43:28 2020, Laszlo, General, Status of the ESR,
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After two days of tuning the beam, yesterday evening (~8pm), it was found out that within one ESR pattern using the new control system the harmonics of
the cavities cannot be changed. This gives us a fatal limitation, that we cannot go lower
than 10MeV/u with the beam energy.
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Thu Mar 19 15:09:29 2020, Jan, General, starting off with DSSSD,
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here is my short guide how to start with the measurement as soon as we have a beam available.
0. ESR timing in DAQ (maybe Uwe can also assist here)
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Thu Mar 19 19:14:40 2020, Laszlo, General, primary beam measurement,
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Now our aim is to decelerate the primary beam (naked 124Xe) down to 10MeV/u. At this energy we can test our detectors and that how the scraping works. In
addition, in the E108b experiment, 124Xe(p,g), there is no measurement point at 10MeV/u. |
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Thu Mar 19 23:48:56 2020, Laszlo, General, 124Xe primary beam at 10Mev TargetOFF,
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Beam lifetime is estimated to be 11sec at least (hard to.see with the cursor the corrct values on the shottky monitor)
but Yury says it is even
~20sec. The particle njmbers are on the attached picture, however at 10Mev the cirrent measurement is not.really
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