An advanced three-axis elliptical hohlraum for indirectly driven inertial confinement fusion
2017
The radiation symmetry and laser-plasma instabilities (LPIs) inside the conventional cylindrical
hohlraumconfiguration are the two daunting challenges on the approach to ignition in indirectly driven
inertial confinement fusion. Recently, near-vacuum cylindrical
hohlraum(NVCH), octahedral spherical
hohlraum(SH) and novel three-axis cylindrical
hohlraum(TACH) were proposed to mitigate these issues. While the coupling efficiency might still be a critical risk. In this paper, an advanced three-axis elliptical
hohlraum(TAEH) is proposed to make a compromise among these
hohlraumperformance. Preliminary simulations indicate that the TAEH (with a case-to-capsule ratio, CCR=2.8) could provide excellent radiation symmetry during the thorough laser pulse of the high-foot drive, comparable to the ones inside the SH (CCR=5.1) and TACH (CCR=2.2). The filling time of plasma affecting the LPIs is between those of SH and TACH, and about 1.5 times of that in the ignition
hohlraumRev5-CH of NIC and close to the one inside the NVCH (CCR=3.4). In particular, the coupling efficiency is about 22%, 29% and 17% higher than the one inside the NVCH, SH and TACH, respectively. It would be envisioned that the proposed
hohlraumconfiguration merits consideration as an alternative route to indirect-drive ignition, complementary to the traditional cylindrical
hohlraumand the proposed recently novel
hohlraums.
Keywords:
-
Correction
-
Source
-
Cite
-
Save
2
References
0
Citations
NaN
KQI