Petawatt-laser direct heating of uniformly imploded deuterated-polystyrene shell target

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

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19 Citations (Scopus)

Abstract

A uniformly imploded deuterated polystyrene (CD) shell target is fast-heated by a Petawatt (PW) laser without cone guide. The best illumination timing is found to be in a narrow region around 80±20 picoseconds from the onset of the stagnation phase, where thermal neutrons are enhanced four to five times by the PW laser of energy less than 10% of the implosion laser. The timing agrees with the timings of enhancement of the x-ray emission from the core and reduction of the bremsstrahlung radiation from scattered hot electrons. The PW laser, focused to the critical density point, generates the energetic electrons within as narrow an angle as 30°, which then heats the imploded CD shell to enhance thermal neutrons. These results first demonstrate that the PW laser directly heats the imploded core without any conelike laser guide.

Original languageEnglish
Article number016403
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume71
Issue number1
DOIs
Publication statusPublished - Jan 2005
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
  • Mathematical Physics

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    Kitagawa, Y., Sentoku, Y., Akamatsu, S., Sakamoto, W., Tanaka, K. A., Kodama, R., Nishimura, H., Inubushi, Y., Nakai, M., Watari, T., Norimatsu, T., & Sunahara, A. (2005). Petawatt-laser direct heating of uniformly imploded deuterated-polystyrene shell target. Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 71(1), [016403]. https://doi.org/10.1103/PhysRevE.71.016403