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 proceedingConference 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 languageEnglish
Title of host publicationInertial Fusion Sciences and Applications 2003
EditorsB.A. Hammel, D.D. Meyerhofer, J. Meyer-ter-Vehn
Pages387-393
Number of pages7
Publication statusPublished - 2004
Externally publishedYes
EventThird International Conference on Inertial Fusion Sciences and Applications, IFSA 2003 - Monterey, CA, United States
Duration: Sep 7 2003Sep 12 2003

Other

OtherThird International Conference on Inertial Fusion Sciences and Applications, IFSA 2003
CountryUnited States
CityMonterey, CA
Period9/7/039/12/03

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Petawatt laser direct heating of imploded plasmas and thermal neutron enhancement'. Together they form a unique fingerprint.

  • Cite this

    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)