Increased neutron yield observed in indirect-drive double-shell experiments using high-energy x-ray preheat at the Shenguang laser facility
In traditional indirect-drive double-shell inertial confinement fusion, high-energy x-ray preheat has always been identified as a major source of degrading implosion performance. However, a significant increase of the neutron yield is observed in ignition-like double-shell implosion experiments performed at Shenguang laser facility by intentionally utilizing high-energy x-ray preheat, mostly from the M-band. Permission of more M-band x-ray absorption inside the inner shell can both significantly mitigate the mix between the fuel and shell with a more stable Awtood number at the fuel-shell interface during the shell deceleration and slightly improve the symmetry of the imploding shell with a high entropy state of the shell, and the contribution outweighs the potential detriment to destabilizing the inner shell from the M-band preheat, which is consistent with radiation-hydrodynamics simulations and theoretical analysis. This novel understanding of the favorable impact of high-energy x-ray preheat on double-shell implosion could facilitate to achieve volumetric ignition and burn with high-Z shells.
Authors
- Zhongjing Chen
- W. H. Ye
- Lü Jing (ORCID: https://orcid.org/0000-0002-8099-2008)
- Wei Jiang (ORCID: https://orcid.org/0000-0002-9394-585X)
- Yushen Liu (ORCID: https://orcid.org/0000-0002-5848-7670)
- M. Wang
- Chao Wu (ORCID: https://orcid.org/0000-0002-9980-6885)
- Guixin Li (ORCID: https://orcid.org/0000-0001-9689-8705)
- Wenhao Zheng (ORCID: https://orcid.org/0000-0002-9618-2456)
- Jiwei Li (ORCID: https://orcid.org/0000-0003-0318-0732)
- Wanli Shang (ORCID: https://orcid.org/0000-0003-2078-2815)
- Wenyi Pei (ORCID: https://orcid.org/0009-0001-5474-4692)
- Banglin Chen (ORCID: https://orcid.org/0000-0001-8707-8115)
- L. F. Wang (ORCID: https://orcid.org/0000-0001-6359-8212)
- Xiao Hui Zhang (ORCID: https://orcid.org/0000-0002-8778-595X)
- Jia Qi (ORCID: https://orcid.org/0000-0002-8831-4922)
- X. T. He (ORCID: https://orcid.org/0000-0002-7033-7640)
- Shaoping Zhu (ORCID: https://orcid.org/0000-0003-3674-4776)
- J. Yan (ORCID: https://orcid.org/0000-0001-6926-6489)
- J. M. Yang
- Z. S. Dai (ORCID: https://orcid.org/0009-0001-9060-8655)
- Sheng-Lung Tu (ORCID: https://orcid.org/0009-0004-2273-9452)
- Jing Zhang (ORCID: https://orcid.org/0009-0001-5370-0014)
Institutions
- Peking University (CN)
- China Academy of Engineering Physics (CN)
- Institute of Applied Physics and Computational Mathematics (CN)
Publication Details
- Journal
- Physical review. E
- Published
- 2024-12-13
- DOI
- https://doi.org/10.1103/physreve.110.l063201
- Primary Topic
- Laser-Plasma Interactions and Diagnostics
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China