Progress in development of the neutron profile monitor for the large helical device

K Ogawa; M Isobe; E Takada; Y Uchida; K Ochiai; H Tomita; A Uritani; T Kobuchi; Y Takeiri

doi:10.1063/1.4890399

Progress in development of the neutron profile monitor for the large helical device

Rev Sci Instrum. 2014 Nov;85(11):11E110. doi: 10.1063/1.4890399.

Authors

K Ogawa¹, M Isobe¹, E Takada², Y Uchida², K Ochiai³, H Tomita⁴, A Uritani⁴, T Kobuchi¹, Y Takeiri¹

Affiliations

¹ National Institute for Fusion Science, Toki 509-5292, Japan.
² National Institute of Technology, Toyama College, 13 Hongo-machi, Toyama 939-8630, Japan.
³ Fusion Research and Development Directorate, Japan Atomic Energy Agency, Tokai, Naka, Ibaraki 319-1195, Japan.
⁴ Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.

PMID: 25430289
DOI: 10.1063/1.4890399

Abstract

The neutron profile monitor stably operated at a high-count-rate for deuterium operations in the Large Helical Device has been developed to enhance the research on the fast-ion confinement. It is composed of a multichannel collimator, scintillation-detectors, and a field programmable gate array circuit. The entire neutron detector system was tested using an accelerator-based neutron generator. This system stably acquires the pulse data without any data loss at high-count-rate conditions up to 8 × 10(5) counts per second.