High adiabat layered implosions driven in a frustraum

Frustraums enable large case-to-capsule ratio layered implosions with a reduced surface wall area relative to cylindrical hohlraums.¹ These properties allow frustraums to drive large capsules, >1200 um inner radius, with high absorbed energy, >320 kJ. We report on the initial indirect-drive inertial confinement fusion experiments caried out in this frustraum campaign. Specifically, we discuss the symmetry of the tuning campaign and plot these results with empirical scalings² derived for cylindrical hohlraums. We discuss experiments using delta lambda to control differences in drive between the pole and equator and present the performance results from the two layered implosions carried out in this campaign.  

[1] P. Amendt et al., Phys. Plasmas 26, 082707 (2019).

[2] D. Callahan et al., Phys. Plasmas 25, 056305 (2018).