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Fujioka S, Johzaki T, Arikawa Y, Zhang Z, Morace A, Ikenouchi T, Ozaki T, Nagai T, Abe Y, Kojima S, Sakata S, Inoue H, Utsugi M, Hattori S, Hosoda T, Lee SH, Shigemori K, Hironaka Y, Sunahara A, Sakagami H, Mima K, Fujimoto Y, Yamanoi K, Norimatsu T, Tokita S, Nakata Y, Kawanaka J, Jitsuno T, Miyanaga N, Nakai M, Nishimura H, Shiraga H, Nagatomo H, Azechi H. Heating efficiency evaluation with mimicking plasma conditions of integrated fast-ignition experiment. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2015; 91:063102. [PMID: 26172803 DOI: 10.1103/physreve.91.063102] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Indexed: 06/04/2023]
Abstract
A series of experiments were carried out to evaluate the energy-coupling efficiency from heating laser to a fuel core in the fast-ignition scheme of laser-driven inertial confinement fusion. Although the efficiency is determined by a wide variety of complex physics, from intense laser plasma interactions to the properties of high-energy density plasmas and the transport of relativistic electron beams (REB), here we simplify the physics by breaking down the efficiency into three measurable parameters: (i) energy conversion ratio from laser to REB, (ii) probability of collision between the REB and the fusion fuel core, and (iii) fraction of energy deposited in the fuel core from the REB. These three parameters were measured with the newly developed experimental platform designed for mimicking the plasma conditions of a realistic integrated fast-ignition experiment. The experimental results indicate that the high-energy tail of REB must be suppressed to heat the fuel core efficiently.
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Affiliation(s)
- Shinsuke Fujioka
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Tomoyuki Johzaki
- Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8527, Japan
| | - Yasunobu Arikawa
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Zhe Zhang
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Alessio Morace
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Takahito Ikenouchi
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Tetsuo Ozaki
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - Takahiro Nagai
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Yuki Abe
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Sadaoki Kojima
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Shohei Sakata
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Hiroaki Inoue
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Masaru Utsugi
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Shoji Hattori
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Tatsuya Hosoda
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Seung Ho Lee
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Keisuke Shigemori
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Youichiro Hironaka
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Atsushi Sunahara
- Institute for Laser Technology, 2-6, Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Hitoshi Sakagami
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - Kunioki Mima
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
- The Graduate School for the Creation of New Photon Industries, 1955-1 Kurematsu, Nishiku, Hamamatsu, Shizuoka, 141-1201, Japan
| | - Yasushi Fujimoto
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Kohei Yamanoi
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Takayoshi Norimatsu
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Shigeki Tokita
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Yoshiki Nakata
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Junji Kawanaka
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Takahisa Jitsuno
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Noriaki Miyanaga
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Mitsuo Nakai
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Hiroaki Nishimura
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Hiroyuki Shiraga
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Hideo Nagatomo
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Hiroshi Azechi
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
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