激光驱动等离子体环境中的核反应数据测量
Measurement of nuclear reaction data in a laser-driven plasma environment
摘要
Abstract
The study of nuclear reactions in plasma environments plays a crucial role in nuclear physics,fusion energy,and astrophysics.The core challenge lies in developing methods and technologies for measuring nuclear reactions in complex plasma environments to accurately obtain relevant nuclear reaction data.This review presents key innovations by the China Institute of Atomic Energy in laser-driven nuclear reaction diagnostics.To overcome EMP interference,a gated 252Cf fission source calibration method was developed,utilizing intrinsic γ-n correlations to achieve direct in-situ calibration of the neutron detector.This technique reduced calibration uncertainty to 46％-50％and improved the signal-to-noise ratio tenfold on the Shenguang-Ⅱ facility.For plasma instability,a self-calibration method based on plasma-jet collisions was established.By measuring the neutron yield ratio YLiD/YDD=0.07±0.01 from 7LiD targets,the astrophysical S-factor for 7Li(D,n)was determined as(24±8)MeV·barn—the first such measurement in a full plasma environment.Results align with cold-target data,indicating negligible electron screening in this regime,suggesting alternative mechanisms for the cosmological lithium problem.D-D experiments yielded 106 neutrons/shot with plasma flow velocities of 8.4×105 m/s matching Gamow window conditions.Proton yields were measured at 8.2×106 per shot using CR-39 diagnostics.These innovations establish quantitative standards for EMP-resistant neutron diagnostics and provide crucial nuclear data for astrophysical models,advancing extreme-condition plasma physics.The original oscilloscope waveform data,measured by the scintillation detector in the target room of the Shanghai Shenguang Facility during each laser shot from August 6 to August 14,2019,are openly available at https://doi.org/10.57760/sciencedb.j00213.00185.关键词
激光核物理/等离子体环境/核反应数据测量/聚变反应Key words
laser nuclear physics/plasma environment/measurement of nuclear reaction data/fusion reaction引用本文复制引用
李弘伟,席晓峰,刘伏龙,吕冲,符长波,郭冰..激光驱动等离子体环境中的核反应数据测量[J].物理学报,2026,75(9):1-16,16.基金项目
国家杰出青年科学基金(批准号:12125509)、国家自然科学基金青年科学基金(批准号:1220051312)、国家自然科学基金(批准号:1220051312,1197050502,12125509,U2441221,12305149,12205378)、国家科技部重点研发计划青年科学家项目(批准号:2024YFA1612700)、核技术研发项目和重点项目(批准号:HJSYF2024(01),U2267204)、财政部稳定支持经费(批准号:18BJ010261224900)、中核集团青年英才"菁英人才"(批准号:FY222506000201,FY0102707224294,FY010260623371)、中核集团基础研究项目(批准号:FK010271224841)、国家重点研发计划(批准号:2022YFA1602403)和核数据基础研究重点实验室(批准号:6142A082024-4)资助的课题. Project supported by the National Science Fund for Distinguished Young Scholars of China(Grant No.12125509),the Young Scientists Fund of the National Natural Science Foundation of China(Grant No.1220051312),the National Natural Science Foundation of China(Grant Nos.1220051312,1197050502,12125509,U2441221,12305149,12205378),the Key Research and Development Program of the Ministry of Science and Technology for Young Scientists,China(Grant No.2024YFA1612700),the Nuclear Technology Research and Development Project and Key Project,China(Grant Nos.HJSYF2024(01),U2267204),the Ministry of Finance Stable Support Fund,China(Grant No.18BJ010261224900),the China National Nuclear Corporation Young Talent"Elite Talent"(Grant Nos.FY222506000201,FY0102707224294,FY010260623371),the China National Nuclear Corporation Basic Research Project(Grant No.FK010271224841),the National Key Research and Development Program of China(Grant No.2022YFA1602403),and the Key Laboratory of Nuclear Data Basic Research,China(Grant No.6142A082024-4). （批准号:12125509）
