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 TP11: Poster Session VII: In-Person, Hall A (9:30-11:00am) and Virtual Poster Presentations (11:15am-12:30pm)
MFE: FRC, RFPs etc
ICF: Fast Ignition; Diagnostics; Computational; Laser Plasma Interactions
FUND: Computation
9:30 AM - 12:30 PM
Thursday, October 20, 2022
Room: Exhibit Hall A and Online
Abstract: TP11.00100 : Nonlinear cross-beam energy transfer model for ICF/HED design codes*
Presenter:
Lin Yin
(Los Alamos Natl Lab)
Authors:
Lin Yin
(Los Alamos Natl Lab)
Truong Nguyen
(Los Alamos National Laboratory)
Guangye Chen
(Los Alamos Natl Lab)
Luis Chacon
(Los Alamos Natl Lab)
David J Stark
(Los Alamos Natl Lab)
Lauren Green
(Los Alamos National Laboratory)
Brian M Haines
(Los Alamos National Laboratory)
Ion trapping induces nonlinear processes such as changes to the plasma response function, the IAW dispersion, and nonlinearities (e.g., bowing and self-focusing), which, together with pump depletion, oblique forward stimulated Raman scattering (FSRS), and backward stimulated Brillouin scattering (BSBS), determine the time-dependent nature and level of CBET gain as the system approaches steady state. Using VPIC simulations, we construct a nonlinear CBET model that computes the CBET gain (including effects from ion trapping and secondary instabilities) from local quantities such as plasma density and laser intensity, the IAW wavenumber kλD, and the electron-to-ion temperature ratio Te/Ti.
*This work was supported by the Los Alamos National Laboratory Directed Research and Development (LDRD) Program. VPIC simulations were run on LANL Institutional Computing Clusters. This work was performed under the auspices of the U.S. Department of Energy by Triad National Security, LLC, operator of the Los Alamos National Laboratory under Contract No. 89233218CNA000001.
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