Study of new substrate THGEMs with low neutron scattering and low radioactivity

	Study of new substrate THGEMs with low neutron scattering and low radioactivity
	Zhang X(张烜); Niu SL(牛顺利); Xie YG(谢宇广); Yan JQ(颜嘉庆); Lv JG(吕军光); Hu T(胡涛); Zhou L(周莉); Wang ZG(王志刚); Cai X(蔡啸); Fang J(方建)
刊名	JOURNAL OF INSTRUMENTATION
	2015
卷号	10 页码:P10043
关键词	Micropattern gaseous detectors (MSGC MICROPIC Neutron detectors (cold GEM MICROMEGAS thermal THGEM InGrid fast neutrons) RETHGEM etc) MHSP
通讯作者	谢宇广
英文摘要	New types of Thick Gaseous Electron Multipliers (THGEMs) made of PCB-type substrates, including Ceramic, Kapton, PTFE, and in addition to FR-4, were developed for applications requiring low neutron absorption, scattering, and low natural radioactivity, such as the THGEM-based neutron detector, and the THGEM-based gaseous multiplier (GPM). Using Geant4 simulation, the result of the total neutron absorption and scattering ratio of bare substrate is Kapton( high) > FR-4 > Ceramic > PTFE (low). The Ceramic and PTFE substrates have lower ratios about 0.707% and 0.635% per layer(0.2 mm thick) respectively. The gamma-induced electron background is the reverse, Ceramic > PTFE > FR-4 > Kapton, from 1.5% to 0.7% at 1.0MeV, which induces highest electron background in the range of 0 similar to 7 MeV. The natural radioactivity background was measured for these types of substrate samples. The Ceramic substrate has lower radioactivity, Th-232 = 8.8 +/- 0.9 Bq/kg, U-238 = 6.3 +/- 0.9 Bq/kg, and K-40 is too low to be detected. Some THGEM samples were produced by these four types of substrates in the same shape: 0.2-mm thickness, 0.2-mm hole diameter, 0.6-mm pitch, and 70-mu m rim. The performances of these new substrate THGEMs are promising. The effective gain is at the 10(4) level and the gain was stable during more than 100 hours continuous test. The energy resolution @Ar+IsoB = 97:3 is at the level of 20% to 27%. These new substrate THGEMs are available in 200x200 mm(2) size and even larger, some of them are applied to neutron flux monitor detector and gaseous photomultipliers (GPM).
学科主题	Instruments & Instrumentation
类目[WOS]	Instruments & Instrumentation
收录类别	SCI
WOS记录号	WOS:000367674700045
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/229028]
专题	高能物理研究所_实验物理中心
推荐引用方式 GB/T 7714	Zhang X,Niu SL,Xie YG,et al. Study of new substrate THGEMs with low neutron scattering and low radioactivity[J]. JOURNAL OF INSTRUMENTATION,2015,10:P10043.
APA	张烜.,牛顺利.,谢宇广.,颜嘉庆.,吕军光.,...&L.(2015).Study of new substrate THGEMs with low neutron scattering and low radioactivity.JOURNAL OF INSTRUMENTATION,10,P10043.
MLA	张烜,et al."Study of new substrate THGEMs with low neutron scattering and low radioactivity".JOURNAL OF INSTRUMENTATION 10(2015):P10043.