Suppression of the Rayleigh-Taylor instability due to self-radiation in a multiablation target.
A scheme to suppress the Rayleigh-Taylor instability has been investigated for a direct-drive inertial fusion target. In a high-Z doped-plastic target, two ablation surfaces are formed separately-one driven by thermal radiation and the other driven by electron conduction. The growth of the Rayleigh-Taylor instability is significantly suppressed on the radiation-driven ablation surface inside the target due to the large ablation velocity and long density scale length. A significant reduction of the growth rate was observed in simulations and experiments using a brominated plastic target. A new direct-drive pellet was designed using this scheme.
Fujioka
Shinsuke
S
Institute of Laser Engineering, Osaka University, 2-6 Yamada-Oka, Suita, Osaka, 565-0871 Japan. sfujioka@ile.osaka-u.ac.jp
Sunahara
Atsushi
A
Nishihara
Katsunobu
K
Ohnishi
Naofumi
N
Johzaki
Tomoyuki
T
Shiraga
Hiroyuki
H
Shigemori
Keisuke
K
Nakai
Mitsuo
M
Ikegawa
Tadashi
T
Murakami
Masakatsu
M
Nagai
Keiji
K
Norimatsu
Takayoshi
T
Azechi
Hiroshi
H
Yamanaka
Tatsuhiko
T