Magnetized fast isochoric laser heating for efficient creation of ultra-high-energy-density states
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Authors
Sakata, Shohei
Lee, Seungho
Morita, Hiroki
Johzaki, Tomoyuki
Sawada, Hiroshi
Iwasa, Yuki
Matsuo, Kazuki
Law, King F. F.
Yao, Akira
Hata, Masayasu
Issue Date
2018
Type
Article
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Abstract
Fast isochoric heating of a pre-compressed plasma core with a high-intensity short-pulse laser is an attractive and alternative approach to create ultra-high-energy-density states like those found in inertial confinement fusion (ICF) ignition sparks. Laser-produced relativistic electron beam (REB) deposits a part of kinetic energy in the core, and then the heated region becomes the hot spark to trigger the ignition. However, due to the inherent large angular spread of the produced REB, only a small portion of the REB collides with the core. Here, we demonstrate a factor-of-two enhancement of laser-to-core energy coupling with the magnetized fast isochoric heating. The method employs a magnetic field of hundreds of Tesla that is applied to the transport region from the REB generation zone to the core which results in guiding the REB along the magnetic field lines to the core. This scheme may provide more efficient energy coupling compared to the conventional ICF scheme.
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Citation
Sakata, S., Lee, S., Morita, H., Johzaki, T., Sawada, H., Iwasa, Y., … Fujioka, S. (2018). Magnetized fast isochoric laser heating for efficient creation of ultra-high-energy-density states. Nature Communications, 9(1). doi:10.1038/s41467-018-06173-6
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ISSN
2041-1723