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 TO04: ICF: Compression and Burn III
9:30 AM–12:18 PM,
Thursday, October 20, 2022
Room: Ballroom 111 A
Chair: Alison Christopherson, LLNL
Abstract: TO04.00011 : Increasing the areal density of N210808 implosion with thicker ablators
11:30 AM–11:42 AM
Presenter:
Annie L Kritcher
(Lawrence Livermore National Laboratory)
Authors:
Annie L Kritcher
(Lawrence Livermore National Laboratory)
Alex B Zylstra
(Lawrence Livermore Natl Lab)
Kelli D Humbird
(Lawrence Livermore Natl Lab)
Chris Weber
(Lawrence Livermore Natl Lab)
Arthur Pak
(Lawrence Livermore Natl Lab)
Debbie A Callahan
(Lawrence Livermore National Laboratory)
Omar A Hurricane
(Lawrence Livermore Natl Lab)
Daniel T Casey
(Lawrence Livermore Natl Lab)
Daniel S Clark
(Lawrence Livermore Natl Lab)
Alison R Christopherson
(Lawrence Livermore National Laboratory)
Laurent Divol
(Lawrence Livermore Natl Lab)
Denise E Hinkel
(Lawrence Livermore National Laboratory)
Bogdan Kustowski
(Lawrence Livermore National Laboratory)
Otto L Landen
(Lawrence Livermore Natl Lab)
Steve A MacLaren
(LLNL)
Katya Newman
(Lawrence Livermore National Laboratory)
Joseph E Ralph
(Lawrence Livermore Natl Lab)
David J Schlossberg
(Lawrence Livermore Natl Lab)
Christopher V Young
(Lawrence Livermore National Laboratory)
This presentation explores designs and preliminary results aimed at increasing the areal density of the hot spot and dense DT fuel piston surrounding the hot spot using thicker diamond ablators. Increasing the areal density is expected to increase the yield amplification and burn-up fraction by trapping more alpha particles and increasing the confinement time. Thicker ablators are also expected to be more robust to unintentional perturbations. We explore 4-8µm thicker HDC ablators (up to 10% thicker than N210808) using laser driver energy of 1.9 to 2.05 MJ. Future designs will also explore using up to 2.2 MJ. A main challenge will be controlling low-mode asymmetries with the thicker targets and longer laser pulses of these designs. Radiation hydrodynamic simulations showing the expected increase in areal density, impact on ignition metrics, and impact on fusion energy production using this configuration will be presented.
[1] to be submitted to Phys. Rev. Lett.
[2] Kritcher et al, to be submitted to Phys. Rev. E
[3] Zylstra et al, to be submitted to Phys. Rev. E
[4] Zylstra et al., Nature 601, 547 (2022)
[5] Kritcher et al., Nature Physics volume 18, 258 (2022)
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