Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session GI01: Inertial Confinement Fusion I
9:30 AM–12:45 PM,
Tuesday, October 18, 2022
Room: Ballroom 100 A
Chair: Brian Spears, LLNL
Abstract: GI01.00002 : Gamma-Ray Measurements of Burning Plasmas achieved in Inertial Fusion*
10:00 AM–10:30 AM
Presenter:
Yongho Kim
(Los Alamos National Laboratory)
Author:
Yongho Kim
(Los Alamos National Laboratory)
While GRH has provided the bang time and burn width since the inception of National Ignition Campaign, there has been an unsettling discrepancy especially in the burn width between simulations and measurements. The team made novel design advancements to include pulse dilation technology which resulted in 10x fast temporal resolution of only 10 ps. This discrepancy persisted until the August 2021 record-yield breakthrough where the prior GRH measurements were confirmed, showing a record short burn duration of 90 ps (30% narrower than before), which is a strong indication of burn propagation.
In summary, through innovating temporal response of instrument and deepening understanding of fusion gamma-rays itself, gamma-ray measurements of burning plasmas can challenge the continued improvement in simulation codes so that the impediments to ignition could be truly identified and addressed.
*This work was performed by the Los Alamos National Laboratory, operated by Triad National Security, LLC for the National Nuclear Security Administration (NNSA) of U.S. Department of Energy (DOE) under contract 89233218CNA000001.
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