Performance of a neutron imaging detector based on the μpIC micro-pixel gaseous chamber

Joseph D. Parker, Masahide Harada, Kaori Hattori, Satoru Iwaki, Shigeto Kabuki, Yuji Kishimoto, Hidetoshi Kubo, Shunsuke Kurosawa, Kentaro Miuchi, Hironobu Nishimura, Takayuki Oku, Tatsuya Sawano, Takenao Shinohara, Jun Ichi Suzuki, Toru Tanimori, Kazuki Ueno

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

A new detector employing a time projection chamber built on the micro-pixel gaseous chamber (PIC) and an FPGA (Field Programmable Gate Array)-based data acquisition system has been developed as a thermal-neutron imaging detector for small-angle neutron scattering (SANS) and neutron radiography. A small amount of 3He added to the gas mixture is used as the neutron absorber, giving a detection efficiency for thermal neutrons of up to 30%. An improved FPGA program permits the simultaneous measurement of the track length and energy deposition for the resulting proton-triton pairs, allowing the separation of the proton and triton for improved position resolution. Here we report the preliminary results of several test experiments performed at the NOBORU beam line at the J-PARC Spallation Neutron Source in November 2009 and June 2010. During these experiments, we observed time-averaged data rates up to 4.5 MHz, and with a time resolution on the order of 1 s per neutron event, we were able to cleanly separate the individual neutron pulses and determine neutron energy by time-of-flight. Using images of cadmium test charts, the position resolution of our detector was estimated as 315 15m (preliminary). We also successfully observed resonance absorption in various metals, SANS diffraction from spherical SiO2 nanoparticles, and Bragg edge transmission of a welded steel plate.

Original languageEnglish
Title of host publicationIEEE Nuclear Science Symposuim and Medical Imaging Conference, NSS/MIC 2010
Pages291-297
Number of pages7
DOIs
Publication statusPublished - 2010
Externally publishedYes
Event2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 and 17th International Workshop on Room-Temperature Semiconductor X-ray and Gamma-ray Detectors, RTSD 2010 - Knoxville, TN, United States
Duration: 2010 Oct 302010 Nov 6

Publication series

NameIEEE Nuclear Science Symposium Conference Record
ISSN (Print)1095-7863

Other

Other2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 and 17th International Workshop on Room-Temperature Semiconductor X-ray and Gamma-ray Detectors, RTSD 2010
Country/TerritoryUnited States
CityKnoxville, TN
Period10/10/3010/11/6

Keywords

  • Field programmable gate arrays
  • Nuclear imaging
  • Radiation detectors

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging

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