 Thu Oct 6 14:43:47 2016, JL Tain, A Tarifeno, A Tolosa, J Agramunt, N Brewer, S Go, ..., Electronics
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We mount back all preamplifiers
Initially we used all the PA coming from US, the repaired and the new ones.
There was an issue with the new ones (strong noise and cross talk)
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Thu Oct 6 02:03:32 2016, JL Tain, START 6x
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We started the assembly of BRIKEN and AIDA detectors in their final position
on Tuesday October 4:
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Thu Aug 18 23:32:59 2016, NT Brewer, New preamps arrived at Oak Ridge and tested working.
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Collaborators,
Attached is a phone photo of example signals from the new preamps with 3 3He tubes connected to a scope. Scope channels 1,2,3 (color y,c,m respectively)
are preamp channels 1,2,3 while 4 (green) is open. Trigger is on channel 3, at 500mV/div and other channels are at 500,200,and 20 mV/Div for channels 2,1,4 |
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Thu Aug 18 22:39:35 2016, NT Brewer, New preamps arrived at Oak Ridge and tested working.
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Collaborators,
Attached is a phone photo of example signals from the new preamps with 3 3He tubes connected to a scope. Scope channels 1,2,3 (color y,c,m respectively)
are preamp channels 1,2,3 while 4 (green) is open. Trigger is on channel 3, at 500mV/div and other channels are at 500,200,and 20 mV/Div for channels 2,1,4 |
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Fri Jul 29 09:52:28 2016, Keishi Matsui, accuracy of Cf-252's intensity in RIKEN
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According to the reply from Japan Radioisotope Association, the accuracy of the Cf-252's intensity is +0%/-15%.
( "+0%" is important, because 3.7 MBq is a standard limit for radio-active sources in Japan.) |
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Fri Jul 22 12:50:29 2016, J.L. Tain, END
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20/JUL/2016 20:00
End of the test measurements |
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Wed Jul 20 17:21:59 2016, J. Agramunt, A. Tolosa, DACQ
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DACQ configuration parameters
The last configuration file used was: 160718Conf_BrikenFull_cal5.xlsx
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Wed Jul 20 17:18:59 2016, J.L. Tain, J. Agramunt, A. Tarifeņo, A. Tolosa, K. Gabor, S. Go, K. Matsui..., Electronics
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Measurement with preamplifiers after drying.
Amplifiers are brought back after ~12h and connected.
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Wed Jul 20 17:05:59 2016, J.L. Tain, J. Agramunt, A. Tarifeņo, A. Tolosa, ..., Background
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Background measurement with remaining tubes (95) overnight
Listmode: 160719_2343_Bkg_*.dlt, Run: 031-044
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Wed Jul 20 16:55:48 2016, K.Gabor, K. Matsui, A. Tarifeņo, Electronic
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Drying of preamplifiers
PA8, PA9 and PA10 are removed and brought to a dryer box
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Wed Jul 20 16:50:12 2016, J.L. Tain, J. Agramunt, A. Tarifeņo, A. Tolosa, S. Go..., 252Cf
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Measurement of the 252Cf source at the central position
Efficiency and neutron-gamma correlations
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Wed Jul 20 16:40:57 2016, S. Go, J.Agramunt, A.Tolosa, J.L. Tain,..., CLOVER
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Calibration and resolution check
CLOVER detectors were calibrated in energy with 60Co and 137Cs
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Wed Jul 20 16:12:58 2016, S. Go, ..., CLOVER
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Mounting of the CLOVER detectors in position
CLOVER G7: right of beam
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Wed Jul 20 16:07:58 2016, A.Tarifeņo, J.L. Tain, J. Agramunt, A. Tolosa, ..., 252Cf
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19/Jul/2016
Scanning of the efficiency as a function of longitudinal position
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Wed Jul 20 12:00:15 2016, J.L. Tain, J. Agramunt, A. Tarifeņo, A. Tolosa, ..., 252Cf
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Measurement with the source at the center
Listmode: 160719_BRIKEN_252Cf_009.dlt
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Wed Jul 20 11:49:00 2016, J.L. Tain, J. Agramunt, R. Baeturia, A. Tarifeņo, A. Tolosa, ..., Background
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18/07/2016
First background measurement overnight.
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Wed Jul 20 11:40:00 2016, J.L. Tain, J. Agramunt, R. Baeturia, A. Tarifeņo, A. Tolosa, ..., 252Cf
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First measurement with full 140 tube version
of the BRIKEN neutron detector
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Wed Jul 20 11:16:18 2016, J.L. Tain, Electronics
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Pulser settings
We use two pulsers, Pulser1 for RIKEN, ORNL1 and ORNL2 tubes (7 PA)
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Wed Jul 20 08:58:13 2016, J.L. Tain, I.Dillman, R. Caballero, J. Agramunt, A. Tarifeņo, A. Tolosa, ..., Electronics
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Distribution of connections of tubes in preamplifiers and digitizers
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Tue Jul 19 13:47:55 2016, A. Tarifeņo-Saldivia, Neutron efficiency - Scanning on Z preliminary result
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We have carried out a scanning of the neutron efficiency with respect to the position along the Z-axis (AIDA and BEAM hole) of a 252Cf neutron
source. A preliminary analysis is presented based on data from the online. A plot with the comparison of the simulations and experimental data is attached. The
experimental results are in good agreement with the GEANT4 simulations of the studies for design of the neutron detector. The simulations for the |
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