[Table of Contents]

Plasma and Fusion Research

Volume 6, 2402148 (2011)

Regular Articles

Design Consideration on Compact Neutron Pinhole Camera with Nuclear Emulsion for Energetic-Ion Profile Diagnostics
Yusuke NOMURA, Hideki TOMITA, Jun KAWARABAYASHI, Tetsuo IGUCHI, Mitsutaka ISOBE1), Kunihiro MORISHIMA2), Toshiyuki NAKANO2), Mitsuhiro NAKAMURA2) and Seiki OHNISHI3)
Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
1)
National Institute for Fusion Science, Oroshi-cho, Toki 509-5292, Japan
2)
Graduate School of Science, Nagoya University, Nagoya 464-8603, Japan
3)
Japan Atomic Energy Agency, Tokai-mura, Naka-gun 319-1195, Japan
(Received 22 December 2010 / Accepted 3 June 2011 / Published 2 December 2011)

Abstract

For imaging of the emission profile of DD neutron produced by energetic deuterium ions, we propose a neutron pinhole camera with state-of-the-art nuclear emulsion technique. Recoiled proton due to elastic scattering of incident neutron passing though the pinhole makes a track in the nuclear emulsion. The incident neutron energy can be estimated by the energy of recoil proton and scattering angle that are derived from the track length and an angle between the track and the incident direction of neutron, respectively. DD neutron emission profile can be obtained with lower background events due to scattered neutrons and gamma-rays. We made preliminary designs on the pinhole collimator size and arrangement. The estimated spatial resolution would be better 100 mm with tungsten alloy collimator for the application to emission profile imaging of DD neutron in LHD plasma.

Keywords

nuclear emulsion, neutron profile monitor, neutron pinhole camera, DD plasma, LHD

DOI: 10.1585/pfr.6.2402148

Full Text

PDF format (9.0Mbytes) PDF Download

References

  • [1] M. Adams et al., Nucl. Instrum. Methods Phys. Res. A 329, 277 (1993).
  • [2] M. Ishikawa et al., Rev. Sci. Instrum. 73, 4237 (2002).
  • [3] http://www.nifs.ac.jp/index.html
  • [4] T. Nakamura et al., Nucl. Instrum. Methods Phys. Res. A 556, 80 (2006).
  • [5] K. Niita et al., “PHITS: Particle and Heavy Ion Transport code System, Version 2.23”, JAEA-Data/Code 2010-022 (2010).

This paper may be cited as follows:

Yusuke NOMURA, Hideki TOMITA, Jun KAWARABAYASHI, Tetsuo IGUCHI, Mitsutaka ISOBE, Kunihiro MORISHIMA, Toshiyuki NAKANO, Mitsuhiro NAKAMURA and Seiki OHNISHI, Plasma Fusion Res. 6, 2402148 (2011).