Gamma-ray imaging with a large micro-TPC and a scintillation camera

K. Hattori, S. Kabuki, H. Kubo, S. Kurosawa, K. Miuchi, T. Nagayoshi, H. Nishimura, Y. Okada, R. Orito, H. Sekiya, A. Takada, A. Takeda, T. Tanimori, K. Ueno

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

We report on the development of a large Compton camera with the full reconstruction of the Compton process based on a prototype. This camera consists of two kinds of detectors. One is a gaseous time projection chamber (micro-TPC) for measuring the energy and the track of a Compton recoil electron. The micro-TPC is based on a μ-PIC and a GEM, which are micro-pattern gas detectors (MPGDs). The size of the micro-TPC was 10 cm × 10 cm × 8 cm in the case of the prototype, and we enlarged it to 23 cm × 28 cm × 15 cm. The other detector part is a NaI (Tl) Anger camera for measuring the scattered gamma-ray. With these informations, we can completely reconstruct a Compton event, and determine the direction of the incident gamma-ray, event by event. We succeeded in reconstructing events of incident 662 keV gamma-rays. The measured angular resolutions of the "angular resolution measure" (ARM) and the "scatter plane deviation" (SPD) were 9 . 3{ring operator} and 158{ring operator} (FWHM), respectively.

Original languageEnglish
Pages (from-to)517-521
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume581
Issue number1-2 SPEC. ISS.
DOIs
Publication statusPublished - 2007 Oct 21
Externally publishedYes

Keywords

  • Compton imaging
  • MeV gamma-ray imaging
  • Time projection chamber

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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