TY - JOUR
T1 - Spatial resolution of a μpIC-based neutron imaging detector
AU - Parker, J. D.
AU - Harada, M.
AU - Hattori, K.
AU - Iwaki, S.
AU - Kabuki, S.
AU - Kishimoto, Y.
AU - Kubo, H.
AU - Kurosawa, S.
AU - Matsuoka, Y.
AU - Miuchi, K.
AU - Mizumoto, T.
AU - Nishimura, H.
AU - Oku, T.
AU - Sawano, T.
AU - Shinohara, T.
AU - Suzuki, J.
AU - Takada, A.
AU - Tanimori, T.
AU - Ueno, K.
N1 - Funding Information:
This work was supported by the Quantum Beam Technology Program of the Japan Ministry of Education, Culture, Sports, Science and Technology (MEXT) . The neutron experiments were performed at NOBORU (BL10) of the J-PARC/MLF with the approval of the Japan Atomic Energy Agency (JAEA) , Proposal no. 2009A0083 . The authors would like to thank the staff at J-PARC and the Materials and Life Science Experimental Facility for their support during our test experiments. The authors would also like to thank M. Ohi for providing the wristwatch used in our resonance absorption measurement.
PY - 2013
Y1 - 2013
N2 - We present a detailed study of the spatial resolution of our time-resolved neutron imaging detector utilizing a new neutron position reconstruction method that improves both spatial resolution and event reconstruction efficiency. Our prototype detector system, employing a micro-pattern gaseous detector known as the micro-pixel chamber (μPIC) coupled with a field-programmable-gate-array- based data acquisition system, combines 100μm-level spatial and sub-μs time resolutions with excellent gamma rejection and high data rates, making it well suited for applications in neutron radiography at high-intensity, pulsed neutron sources. From data taken at the Materials and Life Science Experimental Facility within the Japan Proton Accelerator Research Complex (J-PARC), the spatial resolution was found to be approximately Gaussian with a sigma of 103.48±0.77μm (after correcting for beam divergence). This is a significant improvement over that achievable with our previous reconstruction method (334±13μm), and compares well with conventional neutron imaging detectors and with other high-rate detectors currently under development. Further, a detector simulation indicates that a spatial resolution of less than 60μm may be possible with optimization of the gas characteristics and μPIC structure. We also present an example of imaging combined with neutron resonance absorption spectroscopy.
AB - We present a detailed study of the spatial resolution of our time-resolved neutron imaging detector utilizing a new neutron position reconstruction method that improves both spatial resolution and event reconstruction efficiency. Our prototype detector system, employing a micro-pattern gaseous detector known as the micro-pixel chamber (μPIC) coupled with a field-programmable-gate-array- based data acquisition system, combines 100μm-level spatial and sub-μs time resolutions with excellent gamma rejection and high data rates, making it well suited for applications in neutron radiography at high-intensity, pulsed neutron sources. From data taken at the Materials and Life Science Experimental Facility within the Japan Proton Accelerator Research Complex (J-PARC), the spatial resolution was found to be approximately Gaussian with a sigma of 103.48±0.77μm (after correcting for beam divergence). This is a significant improvement over that achievable with our previous reconstruction method (334±13μm), and compares well with conventional neutron imaging detectors and with other high-rate detectors currently under development. Further, a detector simulation indicates that a spatial resolution of less than 60μm may be possible with optimization of the gas characteristics and μPIC structure. We also present an example of imaging combined with neutron resonance absorption spectroscopy.
KW - Gaseous detector
KW - Micro-pattern detector
KW - Neutron imaging
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U2 - 10.1016/j.nima.2013.06.001
DO - 10.1016/j.nima.2013.06.001
M3 - Article
AN - SCOPUS:84879675217
SN - 0168-9002
VL - 726
SP - 155
EP - 161
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
ER -