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; Hiroshi AZECHI

doi:10.1585/pfr.9.4404110

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, Hiroshi AZECHI

Author information

Yuki ABE
Institute of Laser Engineering, Osaka University
Hirokazu HOSODA
Institute of Laser Engineering, Osaka University
Yasunobu ARIKAWA
Institute of Laser Engineering, Osaka University
Takahiro NAGAI
Institute of Laser Engineering, Osaka University
Sadaoki KOJIMA
Institute of Laser Engineering, Osaka University
Shohei SAKATA
Institute of Laser Engineering, Osaka University
Hiroaki INOUE
Institute of Laser Engineering, Osaka University
Yuki IWASA
Institute of Laser Engineering, Osaka University
Keisuke IWANO
Institute of Laser Engineering, Osaka University
GEKKO-XII & LFEX Team
Institute of Laser Engineering, Osaka University
Shinsuke FUJIOKA
Institute of Laser Engineering, Osaka University
Hiroyuki SHIRAGA
Institute of Laser Engineering, Osaka University
Mitsuo NAKAI
Institute of Laser Engineering, Osaka University
Takayoshi NORIMATSU
Institute of Laser Engineering, Osaka University
Hiroshi AZECHI
Institute of Laser Engineering, Osaka University

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

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2014 Volume 9 Pages 4404110

DOI https://doi.org/10.1585/pfr.9.4404110

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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 × 10⁶deuterium-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.

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