Bulletin of the American Physical Society
65th Annual Meeting of the APS Division of Plasma Physics
Monday–Friday, October 30–November 3 2023; Denver, Colorado
Session JO07: ICF: Compression and Burn I
2:00 PM–5:00 PM,
Tuesday, October 31, 2023
Room: Grand Ballroom I
Chair: Reuben Epstein, University of Rochester
Abstract: JO07.00008 : Computational studies of multi-shock pulse shapes for double shell implosions with considerations for symmetry and engineering feature control
3:24 PM–3:36 PM
Presenter:
Eric N Loomis
(Los Alamos Natl Lab)
Authors:
Eric N Loomis
(Los Alamos Natl Lab)
Harry F Robey
(Los Alamos National Laboratory)
Joshua P Sauppe
(LANL)
Brian M Haines
(Los Alamos National Laboratory)
Irina Sagert
(Los Alamos National Laboratory)
David Stark
(Los Alamos National Laboratory)
Ryan F Sacks
(LANL)
Sasi Palaniyappan
(Los Alamos Natl Lab)
Zaarah Mohamed
(Los Alamos National Laboratory)
Alexander M Rasmus
(Los Alamos National Laboratory)
David Nystrom
(Los Alamos National Laboratory)
Paul A Keiter
(Los Alamos National Laboratory)
For current double shell experiments at the National Ignition Facility, a single shock pulse shape is used to drive the implosion. Peak laser power is reached while the shock is only midway through the ablator shell and under these conditions shock symmetry cannot be maintained. To improve shock symmetry significant changes must be made to the pulse shape, such as utilizing a multi-shock pulse. Our recent simulations using the LANL xRAGE code have also shown that significant reductions in growth of the outer shell assembly joint can be made with a particular type of 2-shock pulse. In this presentation we will discuss the status of our computational findings with multi-shock-driven double shell implosions and our plans for upcoming experimental tests of these designs.
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