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ID 114291
Author
Kobayashi, Makoto National Institutes of Natural Sciences|SOKENDAI
Ogawa, Kunihiro National Institutes of Natural Sciences|SOKENDAI
Isobe, Mitsutaka National Institutes of Natural Sciences|SOKENDAI
Nishitani, Takeo National Institutes of Natural Sciences
Kamio, Shuji National Institutes of Natural Sciences
Fujiwara, Yutaka National Institutes of Natural Sciences
Tsubouchi, Tomomi National Institutes of Natural Sciences|SOKENDAI
Yoshihashi, Sachiko Nagoya University
Uritani, Akira Nagoya University
Osakabe, Masaki National Institutes of Natural Sciences|SOKENDAI
Keywords
diamond detector
neutron
MCNP
PHITS
Content Type
Journal Article
Description
The single crystal CVD diamond detector (SDD) was installed in the torus hall of the Large Helical Device (LHD) to measure neutrons with high time resolution and neutron energy resolution. The LiF foil with 95.62 % of 6Li isotope enrichment pasted on the detector was used as the thermal neutron convertor as the energetic ions of 2.0 MeV alpha and 2.7 MeV triton particles generated in LiF foil and deposited the energy into SDD.
SDD were exposed to the neutron field in the torus hall of the LHD during the 2nd campaign of the deuterium experiment. The total pulse height in SDD was linearly propotional to the neutron yield in a plasma operation in LHD over 4 orders of magnitude. The energetic alpha and triton were separately measured by SDD with LiF with the thickness of 1.9 μm, although SDD with LiF with the thickness of 350 μm showed a broadened peak due to the large energy loss of energetic particles generated in the bulk of LiF. The modeling with MCNP and PHITS codes well interpreted the pulse height spectra for SDD with LiF with different thicknesses. The results above demonstrated the sufficient time resolution and energy discrimination of SDD used in this work.
Journal Title
Journal of Instrumentation
ISSN
17480221
NCID
AA12456425
Publisher
IOP Publishing
Volume
14
Issue
9
Start Page
C09039
Published Date
2019-09-23
Remark
This is the Accepted Manuscript version of an article accepted for publication in Journal of Instrumentation. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1748-0221/14/09/c09039.
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language
eng
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departments
Medical Sciences