Performance and field tests of a handheld Compton camera using 3-D position-sensitive scintillators coupled to multi-pixel photon counter arrays

被引：46

作者：

Kishimoto, A. ^{[1
]}

Kataoka, J. ^{[1
]}

Nishiyama, T. ^{[1
]}

Fujita, T. ^{[1
]}

Takeuchi, K. ^{[1
]}

Okochi, H. ^{[1
]}

Ogata, H. ^{[1
]}

Kuroshima, H. ^{[1
]}

Ohsuka, S. ^{[2
]}

Nakamura, S. ^{[3
]}

Hirayanagi, M. ^{[3
]}

Adachi, S. ^{[3
]}

Uchiyama, T. ^{[3
]}

Suzuki, H. ^{[3
]}

机构：

[1] Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan

[2] Hamamatsu Photon KK, Cent Res Lab, Hamakita Ku, Hamamatsu, Shizuoka, Japan

[3] Hamamatsu Photon K K, Higashi Ku, Hamamatsu, Shizuoka, Japan

来源：

JOURNAL OF INSTRUMENTATION | 2014年 / 9卷

关键词：

Compton imaging; Gamma detectors (scintillators; CZT; HPG; HgI etc); TELESCOPE; DETECTOR;

D O I：

10.1088/1748-0221/9/11/P11025

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

After the nuclear disaster in Fukushima, radiation decontamination has become particularly urgent. To help identify radiation hotspots and ensure effective decontamination operation, we have developed a novel Compton camera based on Ce-doped Gd3Al2Ga3O12 scintillators and multi-pixel photon counter (MPPC) arrays. Even though its sensitivity is several times better than that of other cameras being tested in Fukushima, we introduce a depth-of-interaction (DOI) method to further improve the angular resolution. For gamma rays, the DOI information, in addition to 2-D position, is obtained by measuring the pulse-height ratio of the MPPC arrays coupled to ends of the scintillator. We present the detailed performance and results of various field tests conducted in Fukushima with the prototype 2-D and DOI Compton cameras. Moreover, we demonstrate stereo measurement of gamma rays that enables measurement of not only direction but also approximate distance to radioactive hotspots.

引用

页数：14

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