Petawatt laser direct heating of imploded plasmas and thermal neutron enhancement

Yoneyoshi Kitagawa; Shin Akamatsu; Wataru Sakamoto; Kazuo A. Tanaka; Ryosuke Kodama; Hiroaki Nishimura; Yuichi Inubushi; Mitsuo Nakai; Takeshi Watari; Takayoshi Norimatsu; Atsushi Sunahara; Yasuhiko Sentoku

Petawatt laser direct heating of imploded plasmas and thermal neutron enhancement

Yoneyoshi Kitagawa, Shin Akamatsu, Wataru Sakamoto, Kazuo A. Tanaka, Ryosuke Kodama, Hiroaki Nishimura, Yuichi Inubushi, Mitsuo Nakai, Takeshi Watari, Takayoshi Norimatsu, Atsushi Sunahara, Yasuhiko Sentoku

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

To heat an uniformly imploded deuterated polystyrene shell target, Petawatt laser illumination timing is scanned from the implosion, through stagnation to expansion or disruption phases. After 80 ± 20 picosecond from the onset of the stagnation phase but yet within it, thermal neutrons are four times enhanced from l × 10⁶. The timing exactly agrees with that of X-ray emission from the core. In the stagnation phase, beam fusion neutrons reduced to 1.5 times the thermal one. Temporal behaviours of Bremsstrahlung due to hot electrons and laser backscatterings support the the timing.

Original language	English
Title of host publication	Inertial Fusion Sciences and Applications 2003
Editors	B.A. Hammel, D.D. Meyerhofer, J. Meyer-ter-Vehn
Pages	387-393
Number of pages	7
Publication status	Published - 2004
Externally published	Yes
Event	Third International Conference on Inertial Fusion Sciences and Applications, IFSA 2003 - Monterey, CA, United States Duration: Sep 7 2003 → Sep 12 2003

Other

Other	Third International Conference on Inertial Fusion Sciences and Applications, IFSA 2003
Country	United States
City	Monterey, CA
Period	9/7/03 → 9/12/03

ASJC Scopus subject areas

Engineering(all)

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Kitagawa, Y., Akamatsu, S., Sakamoto, W., Tanaka, K. A., Kodama, R., Nishimura, H., Inubushi, Y., Nakai, M., Watari, T., Norimatsu, T., Sunahara, A., & Sentoku, Y. (2004). Petawatt laser direct heating of imploded plasmas and thermal neutron enhancement. In B. A. Hammel, D. D. Meyerhofer, & J. Meyer-ter-Vehn (Eds.), Inertial Fusion Sciences and Applications 2003 (pp. 387-393)

Petawatt laser direct heating of imploded plasmas and thermal neutron enhancement. / Kitagawa, Yoneyoshi; Akamatsu, Shin; Sakamoto, Wataru; Tanaka, Kazuo A.; Kodama, Ryosuke; Nishimura, Hiroaki; Inubushi, Yuichi; Nakai, Mitsuo; Watari, Takeshi; Norimatsu, Takayoshi; Sunahara, Atsushi; Sentoku, Yasuhiko.

Inertial Fusion Sciences and Applications 2003. ed. / B.A. Hammel; D.D. Meyerhofer; J. Meyer-ter-Vehn. 2004. p. 387-393.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kitagawa, Y, Akamatsu, S, Sakamoto, W, Tanaka, KA, Kodama, R, Nishimura, H, Inubushi, Y, Nakai, M, Watari, T, Norimatsu, T, Sunahara, A & Sentoku, Y 2004, Petawatt laser direct heating of imploded plasmas and thermal neutron enhancement. in BA Hammel, DD Meyerhofer & J Meyer-ter-Vehn (eds), Inertial Fusion Sciences and Applications 2003. pp. 387-393, Third International Conference on Inertial Fusion Sciences and Applications, IFSA 2003, Monterey, CA, United States, 9/7/03.

Kitagawa, Yoneyoshi ; Akamatsu, Shin ; Sakamoto, Wataru ; Tanaka, Kazuo A. ; Kodama, Ryosuke ; Nishimura, Hiroaki ; Inubushi, Yuichi ; Nakai, Mitsuo ; Watari, Takeshi ; Norimatsu, Takayoshi ; Sunahara, Atsushi ; Sentoku, Yasuhiko. / Petawatt laser direct heating of imploded plasmas and thermal neutron enhancement. Inertial Fusion Sciences and Applications 2003. editor / B.A. Hammel ; D.D. Meyerhofer ; J. Meyer-ter-Vehn. 2004. pp. 387-393

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title = "Petawatt laser direct heating of imploded plasmas and thermal neutron enhancement",

abstract = "To heat an uniformly imploded deuterated polystyrene shell target, Petawatt laser illumination timing is scanned from the implosion, through stagnation to expansion or disruption phases. After 80 ± 20 picosecond from the onset of the stagnation phase but yet within it, thermal neutrons are four times enhanced from l × 106. The timing exactly agrees with that of X-ray emission from the core. In the stagnation phase, beam fusion neutrons reduced to 1.5 times the thermal one. Temporal behaviours of Bremsstrahlung due to hot electrons and laser backscatterings support the the timing.",

author = "Yoneyoshi Kitagawa and Shin Akamatsu and Wataru Sakamoto and Tanaka, {Kazuo A.} and Ryosuke Kodama and Hiroaki Nishimura and Yuichi Inubushi and Mitsuo Nakai and Takeshi Watari and Takayoshi Norimatsu and Atsushi Sunahara and Yasuhiko Sentoku",

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editor = "B.A. Hammel and D.D. Meyerhofer and J. Meyer-ter-Vehn",

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AU - Kitagawa, Yoneyoshi

AU - Akamatsu, Shin

AU - Sakamoto, Wataru

AU - Tanaka, Kazuo A.

AU - Kodama, Ryosuke

AU - Nishimura, Hiroaki

AU - Inubushi, Yuichi

AU - Nakai, Mitsuo

AU - Watari, Takeshi

AU - Norimatsu, Takayoshi

AU - Sunahara, Atsushi

AU - Sentoku, Yasuhiko

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AB - To heat an uniformly imploded deuterated polystyrene shell target, Petawatt laser illumination timing is scanned from the implosion, through stagnation to expansion or disruption phases. After 80 ± 20 picosecond from the onset of the stagnation phase but yet within it, thermal neutrons are four times enhanced from l × 106. The timing exactly agrees with that of X-ray emission from the core. In the stagnation phase, beam fusion neutrons reduced to 1.5 times the thermal one. Temporal behaviours of Bremsstrahlung due to hot electrons and laser backscatterings support the the timing.

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