Spatial resolution properties of krypton-based mixtures using a 100 μm thick Gas Electron Multiplier

被引：3
|
作者：
Roque, R. C. [1 ]
Natal da Luz, H. [2 ]
Carramate, L. F. N. D. [3 ]
Azevedo, C. D. R. [3 ]
Mir, J. A. [1 ]
Amaro, F. D. [1 ]
机构：
[1] Univ Coimbra, LIBPhys Dept Phys, P-3004516 Coimbra, Portugal
[2] Univ Sao Paulo, Inst Fis, Rua Matao 1371, Saco Paulo, Brazil
[3] Univ Aveiro, Phys Dept I3N, P-3810193 Aveiro, Portugal
来源：
JOURNAL OF INSTRUMENTATION | 2018年 / 13卷
基金：
巴西圣保罗研究基金会;
关键词：
Electron multipliers (gas); Gaseous imaging and tracking detectors; Micropattern gaseous detectors (MSGC; GEM; THGEM; RETHGEM; MHSP; MICROPIC; MICROMEGAS; InGrid; etc); X-ray detectors; DETECTORS; LIMITS;
D O I：
10.1088/1748-0221/13/10/P10010
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A gaseous imaging detector based on a cascade of two non-standard gas electron multipliers (100 mu m thick GEM) was operated in five different krypton-based mixtures and the achievable position resolution was determined. The micropattern gaseous detector (MPGD) has an active area of 10 x 10 cm(2). The GEM foils are twice as thick as a standard GEM, being more robust to electric discharges and less prone to sparking-caused damage. Krypton, being the noble gas with the lowest value of intrinsic position resolution in the range 14-34 keV, is a good candidate for imaging applications based on gaseous detectors. Our measurements have confirmed that krypton-CO2 mixtures showed an improvement in position resolution above 18 keV and up to 30 keV relatively to Ar-CO2 mixtures. The MTF value at 10% in the energy range 22-24 keV was evaluated, being 0.5876(342)1p/cm for Ar-CO2 (70:30) and a maximum of 3.2702(15) 1p/cm for the Kr-CO2 (90:10) mixture.
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页数：9
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