Plasma and Fusion Research

Volume 9, 4405109 (2014)

Regular Articles

Development of Compton X-Ray Spectrometer for Fast Ignition Experiment

Sadaoki KOJIMA, Yasunobu ARIKAWA, Takahito IKENOUCHI, Takahiro NAGAI, Yuki ABE, Shouhei SAKATA, Hiroaki INOUE, Takuya NAMIMOTO, Shinsuke FUJIOKA, Mitsuo NAKAI, Hiroyuki SHIRAGA, GEKKO-XII&LFEX Team, Tetsuo OZAKI¹⁾, Makoto R. ASAKAWA²⁾, Ryukou KATO³⁾ and Hiroshi AZECHI

: Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita 565-0871, Japan
1): National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
2): Faculty of Engineering Science, Kansai University, 3-3 Yamate, Suita 564-8680, Japan
3): Institute of Scientific and Industrial Research, Osaka University, 2-6 Yamada-oka, Suita 565-0871, Japan

(Received 22 July 2013 / Accepted 20 February 2014 / Published 27 June 2014)

Abstract

In the context of Fast Ignition, the fast electron temperature is a key parameter to determine the laser-to-fast electron energy conversion efficiency. Bremsstrahlung X-ray (γ-ray) emission represents an attractive alternative to measure this fundamental parameter. In this study, a single-shot high-energy γ-ray spectrometer with sensitivity ranging from 0.5 MeV to 7 MeV was developed, allowing to estimate the γ-ray spectrum in the fast ignition.

Keywords

fast ignition, inertial confinement fusion, fast electron, x-ray spectrometer, filter stack spectrometer

DOI: 10.1585/pfr.9.4405109

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This paper may be cited as follows:

Sadaoki KOJIMA, Yasunobu ARIKAWA, Takahito IKENOUCHI, Takahiro NAGAI, Yuki ABE, Shouhei SAKATA, Hiroaki INOUE, Takuya NAMIMOTO, Shinsuke FUJIOKA, Mitsuo NAKAI, Hiroyuki SHIRAGA, GEKKO-XII&LFEX Team, Tetsuo OZAKI, Makoto R. ASAKAWA, Ryukou KATO and Hiroshi AZECHI, Plasma Fusion Res. 9, 4405109 (2014).