[Table of Contents]

Plasma and Fusion Research

Volume 9, 4404110 (2014)

Regular Articles

Development of Multichannel Time-of-Flight Neutron Spectrometer for the Fast Ignition Experiment
Yuki ABE, Hirokazu HOSODA, Yasunobu ARIKAWA, Takahiro NAGAI, Sadaoki KOJIMA, Shohei SAKATA, Hiroaki INOUE, Yuki IWASA, Keisuke IWANO, GEKKO-XII & LFEX Team, Shinsuke FUJIOKA, Hiroyuki SHIRAGA, Mitsuo NAKAI, Takayoshi NORIMATSU and Hiroshi AZECHI
Institute of Laser Engineering, Osaka University, Suita 565-0871, Japan
(Received 4 July 2013 / Accepted 24 February 2014 / Published 27 June 2014)

Abstract

Neutron diagnostic in the fast-ignition experiment was successfully demonstrated by the multichannel time-of-flight neutron spectrometer MANDALA at Institute of Laser Engineering (ILE) in Osaka University. A large neutron collimator dramatically suppressed the serious background noise caused by photo-neutrons, and a peak yield of 2 × 106 deuterium-deuterium (DD) fusion neutrons was clearly observed. The new MANDALA system will provide measurements of the ion temperature and the areal density of the core plasma in the next fast-ignition experimental campaign in 2013. In this paper, we will present the design of the neutron collimator and the experimental results in the Fast-ignition Campaign 2012.

Keywords

Fast-ignition laser fusion, neutron diagnostics, multichannel nTOF spectrometer, hard Bremsstrahlung x-ray, photo-neutron, neutron collimator

DOI: 10.1585/pfr.9.4404110

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This paper may be cited as follows:

Yuki ABE, Hirokazu HOSODA, Yasunobu ARIKAWA, Takahiro NAGAI, Sadaoki KOJIMA, Shohei SAKATA, Hiroaki INOUE, Yuki IWASA, Keisuke IWANO, GEKKO-XII & LFEX Team, Shinsuke FUJIOKA, Hiroyuki SHIRAGA, Mitsuo NAKAI, Takayoshi NORIMATSU and Hiroshi AZECHI, Plasma Fusion Res. 9, 4404110 (2014).