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Applicability of Parallel Plate Avalanche Counters to Spontaneous Fission from Cf-252

Yasin, Zafar; Hansen, Kurt LU ; Lundin, Magnus LU ; Rassol, Roger; Isaksson, Lennart LU and Schröder, Bent LU (2012) In International Journal of Modern Physics E 21(4).
Abstract
The construction and performance of the parallel plate avalanche counters (PPACs) using a spontaneous fission source Cf-252 is described in this paper. The parallel plate circular electrodes are made of aluminum foils having a thickness less than ten microns. After fabrication, the detectors and the source are mounted inside a reaction chamber, the source between the two detectors. A low pressure is created inside the chamber using isobutane (C4H10) and a high voltage is applied to the electrodes. The detectors are first operated at different pressures and voltages to find the optimum values of the pressure and the voltage. This is necessary to avoid the sparking threshold, to achieve a good time resolution and to keep the gain of the... (More)
The construction and performance of the parallel plate avalanche counters (PPACs) using a spontaneous fission source Cf-252 is described in this paper. The parallel plate circular electrodes are made of aluminum foils having a thickness less than ten microns. After fabrication, the detectors and the source are mounted inside a reaction chamber, the source between the two detectors. A low pressure is created inside the chamber using isobutane (C4H10) and a high voltage is applied to the electrodes. The detectors are first operated at different pressures and voltages to find the optimum values of the pressure and the voltage. This is necessary to avoid the sparking threshold, to achieve a good time resolution and to keep the gain of the detectors high and constant. The. PPACs are operated in 2 pi- and 4 pi-geometries. In 4 pi-geometry the detectors are allowed to function in coincidence and noncoincidence mode. The resulting pulse height and the time spectra are studied using the computer code ROOT and some conclusions are drawn from these analyses. The pulse height spectrum shows a clear separation between the fission fragments and the alpha particles and the time spectrum indicates a good intrinsic time resolution, 0.76 ns. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
PPACs, Cf-252, spontaneous fission, time resolution
in
International Journal of Modern Physics E
volume
21
issue
4
publisher
World Scientific
external identifiers
  • wos:000304004700009
  • scopus:84862071928
ISSN
0218-3013
DOI
10.1142/S0218301312500528
language
English
LU publication?
yes
id
cbece79b-d387-4acb-8ed5-6ca3e9d6a217 (old id 2819396)
date added to LUP
2012-06-21 11:01:22
date last changed
2017-01-01 06:24:56
@article{cbece79b-d387-4acb-8ed5-6ca3e9d6a217,
  abstract     = {The construction and performance of the parallel plate avalanche counters (PPACs) using a spontaneous fission source Cf-252 is described in this paper. The parallel plate circular electrodes are made of aluminum foils having a thickness less than ten microns. After fabrication, the detectors and the source are mounted inside a reaction chamber, the source between the two detectors. A low pressure is created inside the chamber using isobutane (C4H10) and a high voltage is applied to the electrodes. The detectors are first operated at different pressures and voltages to find the optimum values of the pressure and the voltage. This is necessary to avoid the sparking threshold, to achieve a good time resolution and to keep the gain of the detectors high and constant. The. PPACs are operated in 2 pi- and 4 pi-geometries. In 4 pi-geometry the detectors are allowed to function in coincidence and noncoincidence mode. The resulting pulse height and the time spectra are studied using the computer code ROOT and some conclusions are drawn from these analyses. The pulse height spectrum shows a clear separation between the fission fragments and the alpha particles and the time spectrum indicates a good intrinsic time resolution, 0.76 ns.},
  author       = {Yasin, Zafar and Hansen, Kurt and Lundin, Magnus and Rassol, Roger and Isaksson, Lennart and Schröder, Bent},
  issn         = {0218-3013},
  keyword      = {PPACs,Cf-252,spontaneous fission,time resolution},
  language     = {eng},
  number       = {4},
  publisher    = {World Scientific},
  series       = {International Journal of Modern Physics E},
  title        = {Applicability of Parallel Plate Avalanche Counters to Spontaneous Fission from Cf-252},
  url          = {http://dx.doi.org/10.1142/S0218301312500528},
  volume       = {21},
  year         = {2012},
}