Development of an Electron-Tracking Compton Camera using CF4 gas at high pressure for improved detection efficiency

被引:12
作者
Takahashi, Michiaki [1 ]
Kabuki, Shigeto [1 ]
Hattori, Kaori [1 ]
Higashi, Naoki [1 ]
Iwaki, Satoru [1 ]
Kubo, Hidetoshi [1 ]
Kurosawa, Shunsuke [1 ]
Miuchi, Kentaro [1 ]
Nakamura, Kiseki [1 ]
Nishimura, Hironobu [1 ]
Parker, Joseph D. [1 ]
Sawano, Tatsuya [1 ]
Takada, Atsushi [2 ]
Tanimori, Toru [1 ]
Taniue, Kojiro [1 ]
Ueno, Kazuki [1 ]
机构
[1] Kyoto Univ, Grad Sch Sci, Dept Phys, Sakyo Ku, Kyoto 6068502, Japan
[2] JAXA & Yoshinodai, ISAS, Sci Balloon Lab, Sagamihara, Kanagawa 2298510, Japan
关键词
Gaseous detector; CF4; Time projection chamber; Compton imaging; mu-PIC; GEM; IMAGING DETECTOR; PERFORMANCE; CHAMBER;
D O I
10.1016/j.nima.2010.06.305
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
We have developed an Electron-Tracking Compton Camera (ETCC) for medical imaging and MeV gamma-ray astronomy. The ETCC consists of a gaseous Time Projection Chamber (mu-TPC) and pixel scintillator arrays. To improve the detection efficiency, we have optimized the gas mixture in the mu-TPC and operated the ETCC at high pressure. Basic characteristics such as the gas gain, drift velocity, energy resolution, and position resolution of the mu-TPC were examined, and using this optimization, both the efficiency and the angular resolution of the ETCC were measured. We achieved a steady gas gain of similar to 20,000 in Ar/CF4/isoC(4)H(10) (54:40:6) at 1.4 atm. The diffusion constant in Ar/CF4/isoC(4)H(10) (54:40:6) at 1.4 atm was similar to 2 times better than in Ar/C2H6 (90:10) at 1 atm. The efficiency in Ar/CF4/isoC(4)H(10) (54:40:6) at 1.4 atm was also similar to 2 times higher than in Ar/C2H6 (90:10) at 1 atm. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:150 / 153
页数:4
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