Study of a sealed high gas pressure THGEM detector and response of alpha particle spectra
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摘要
A sealed high gas pressure detector working in pure argon is assembled.It consists of a 5 cm x 5 cm PCB THGEM(THick Gaseous Electron Multiplier).The detector structure and experimental setup are described.The performance under high pressure(2 atm) is examined,selecting optimal voltages for the ionization region and induction region.The dependence of the shape of alpha particle spectra measured with relative gas gain on gas pressure(1.3-2.0 atm) has been studied.Eight data sets of relative gas gain versus working voltage of THGEM,expressed by weighting field E/P,are normalized,consistent with theory.The results show that the air tightness of the chamber is good,measured by a sensitive barometer and checked with gas gain.The experimental results are compared with Monte Carlo simulation of energy deposition without gas gain involved.
A sealed high gas pressure detector working in pure argon is assembled.It consists of a 5 cm x 5 cm PCB THGEM(THick Gaseous Electron Multiplier).The detector structure and experimental setup are described.The performance under high pressure(2 atm) is examined,selecting optimal voltages for the ionization region and induction region.The dependence of the shape of alpha particle spectra measured with relative gas gain on gas pressure(1.3-2.0 atm) has been studied.Eight data sets of relative gas gain versus working voltage of THGEM,expressed by weighting field E/P,are normalized,consistent with theory.The results show that the air tightness of the chamber is good,measured by a sensitive barometer and checked with gas gain.The experimental results are compared with Monte Carlo simulation of energy deposition without gas gain involved.
A sealed high gas pressure detector working in pure argon is assembled.It consists of a 5 cm x 5 cm PCB THGEM(THick Gaseous Electron Multiplier).The detector structure and experimental setup are described.The performance under high pressure(2 atm) is examined,selecting optimal voltages for the ionization region and induction region.The dependence of the shape of alpha particle spectra measured with relative gas gain on gas pressure(1.3-2.0 atm) has been studied.Eight data sets of relative gas gain versus working voltage of THGEM,expressed by weighting field E/P,are normalized,consistent with theory.The results show that the air tightness of the chamber is good,measured by a sensitive barometer and checked with gas gain.The experimental results are compared with Monte Carlo simulation of energy deposition without gas gain involved.
引文
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24 Data for the241Am source.https://en.wikipedia.org/wiki/Americium#cite note-92
25 B.Sitar et al,Ionization Measurements in High Energy Physics(Berlin:Springer,1993),p.89
2 C.Shalem et al,Nucl.Instrum.Methods A,558:475-489(2006)
3 A.Breskin et al,Nucl.Instrum.Methods A,598:107-111(2009)
4 H.B.Liu et al,Nucl.Instrum.Methods A,659:237-241(2011)
5 H.B.Liu et al,JINST,7:C06001(2012)
6 Q.Liu et al,JINST,8:C11008(2013)
7 A.Bressan et al,Nucl.Instrum.Meth.A,423:119-124(1999)
8 A.Buzulutskov et al,Nucl.Instrum.Meth.A,433:471-475(1999)
9 A.S.Korff,Electron and Nuclear Counters(New York:VanNostrand,1955)
10 F.Sauli,Principles of operation of multiwire proportional and drift chambers,CERN-77-09(1977)
11 G.Charpak et al,JINST,3:P02006(2008)
12 H.B.Xue et al,Proceedings of the 4th National Conference on Nuclear Monitoring(1999)(in Chinese)
13 B.L.Paredes et al,JINST,10:P07017(2015)
14 K.Saito et al,IEEE Transactions on Nuclear Science,49(4):1674-1680(2002)
15 D.Y.Kim et al,Journal of the Korean Physical Society,68:1060-1068(2016)
16 S.Agostinelli et al,Nucl.Instrum.Methods A,506:250-303(2003)
17 F.D.Amaro et al,Nucl.Instrum.Methods A,579:62-66(2007)
18 J.Dong et al,Chinese Phys.B,18:4299-4233(2009)
19 X.K.Zhou et al,Chin.Phys.Lett,31(3):032901(2014)
20 H.B.Liu et al,Chin.Phys.C,35(4):363-367(2011)
21 F.Sauli et al,Nucl.Instrum.Methods A,560:269-277(2006)
22 M.Alexeev et al,JINST,8:P01021(2013)
23 B.L.Wang et al,Chin.Phys.Lett,31(12):122901(2014)
24 Data for the241Am source.https://en.wikipedia.org/wiki/Americium#cite note-92
25 B.Sitar et al,Ionization Measurements in High Energy Physics(Berlin:Springer,1993),p.89