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Effects of the P2 M-band flux asymmetry of laser-driven gold Hohlraums on the implosion of ICF ignition capsule
- Source :
- Physics of Plasmas. 23:072705
- Publication Year :
- 2016
- Publisher :
- AIP Publishing, 2016.
-
Abstract
- Low-mode asymmetries in the laser-indirect-drive inertial confinement fusion implosion experiments conducted on the National Ignition Facility [G. H. Miller et al., Nucl. Fusion 44, S228 (2004)] are deemed the main obstacles hindering further improvement of the nuclear performance of deuterium-tritium-layered capsules. The dominant seeds of these asymmetries include the P2 and P4 asymmetries of x-ray drives and P2 asymmetry introduced by the supporting “tent.” Here, we explore the effects of another possible seed that can lead to low-mode asymmetric implosions, i.e., the M-band flux asymmetry (MFA) in laser-driven cylindrical gold Hohlraums. It is shown that the M-band flux facilitates the ablation and acceleration of the shell, and that positive P2 MFAs can result in negative P2 asymmetries of hot spots and positive P2 asymmetries of shell's ρR. An oblate or toroidal hot spot, depending on the P2 amplitude of MFA, forms at stagnation. The energy loss of such a hot spot via electron thermal conduction is ...
- Subjects :
- Physics
Toroid
media_common.quotation_subject
Implosion
Hot spot (veterinary medicine)
Condensed Matter Physics
Thermal conduction
01 natural sciences
Asymmetry
010305 fluids & plasmas
Nuclear physics
Hohlraum
0103 physical sciences
010306 general physics
National Ignition Facility
Inertial confinement fusion
media_common
Subjects
Details
- ISSN :
- 10897674 and 1070664X
- Volume :
- 23
- Database :
- OpenAIRE
- Journal :
- Physics of Plasmas
- Accession number :
- edsair.doi...........cc719fbc0bff05e917b0194a41a3d499