Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8133557 | High Energy Density Physics | 2015 | 4 Pages |
Abstract
Quantitative high-energy X-ray spectroscopy is applied for the laser plasma interaction in the fast ignition scheme. A double tracer layer target is designed for the absolute measurement of hot electron temperature and laser energy transfer efficiency. The hot electron temperature is determined from the ratio of the number of Kα photons from the first and second tracers. Consequently, the energy transfer efficiency from incident laser beams to hot electrons, as the energy transfer mechanism, is derived. In a cone-guide geometry, we simultaneously measured the hot electron temperature and the energy transfer efficiency from the incident LFEX, a kJ-class PW laser, which were measured to be 5.3 MeV and 37%, respectively.
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Authors
Z. Zhang, H. Nishimura, S. Fujioka, Y. Arikawa, T. Ikenouchi, M. Nakai, H. Nagatomo, H. Chen, J. Park, G.J. Williams, T. Ozaki, H. Shiraga, S. Kojima, H. Hosoda, N. Miyanaga, J. Kawanaka, Y. Nakata, T. Jitsuno, H. Azechi,