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Nuclear probes of an out-of-equilibrium plasma at the highest compression
Zhang, G; Huang, M; Bonasera, A; Ma, YG; Sheng, BF; Wang, HW; Wang, WP; Xu, JC; Fan, GT; Fu, HJ; Xue, H; Zheng, H; Liu, LX; Zhang, S; Li, WJ; Cao, XG; Deng, XG; Li, XY; Liu, YC; Yu, Y; Zhang, Y; Fu, CB; Zhang, XP
Source PublicationPHYSICS LETTERS A
AbstractWe report the highest compression reached in laboratory plasmas using eight laser beams, E-laser approximate to 12 kJ, tau(laser) = 2 ns in third harmonic on a CD2 target at the ShenGuang-II Upgrade (SGII-Up) facility in Shanghai, China. We estimate the deuterium density rho(D) = 2.0 +/- 0.9 kg/cm(3), and the average kinetic energy of the plasma ions less than 1 keV. The highest reached areal density Lambda rho(D) = 4.8 +/- 1.5 g/cm(2) was obtained from the measured ratio of the sequential ternary fusion reactions (dd -> t+p and t+d ->alpha+n) and the two body reaction fusions (dd -> He-3 + n). At such high densities, sequential ternary and also quaternary nuclear reactions become important as well (i.e. n(14.1 MeV)+C-12 -> n'+12C* etc.) resulting in a shift of the neutron (and proton) kinetic energies from their birth values. The Down Scatter Ratio (DSR-quaternary nuclear reactions) method, i.e. the ratio of the 10-12 MeV neutrons divided by the total number of 14.1 MeV neutrons produced, confirms the high densities reported above. The estimated lifetime of the highly compressed plasma is 52 +/- 9 ps, much smaller than the lasers pulse duration. (C) 2019 Elsevier B.V. All rights reserved.
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Affiliation1.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China;
2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China;
3.Inner Mongolia Univ Nationalities, Coll Phys & Elect Informat, Tongliao 028000, Peoples R China;
4.Texas A&M Univ, Cyclotron Inst, College Stn, TX 77843 USA;
5.Ist Nazl Fis Nucl, Lab Nazl Sud, Via Santa Sofia 62, I-95123 Catania, Italy;
6.Fudan Univ, Inst Modern Phys, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai 200433, Peoples R China;
7.Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, State Key Lab High Field Laser Phys, Shanghai 201800, Peoples R China;
8.Shanghai Normal Univ, Dept Phys, Shanghai 200234, Peoples R China;
9.Univ Chinese Acad Sci, Beijing 100080, Peoples R China;
10.Shaanxi Normal Univ, Sch Phys & Informat Technol, Xian 710119, Shaanxi, Peoples R China;
11.Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China
Recommended Citation
GB/T 7714
Zhang, G,Huang, M,Bonasera, A,et al. Nuclear probes of an out-of-equilibrium plasma at the highest compression[J]. PHYSICS LETTERS A,2019,383(19):2285—2289.
APA Zhang, G.,Huang, M.,Bonasera, A.,Ma, YG.,Sheng, BF.,...&Zhang, XP.(2019).Nuclear probes of an out-of-equilibrium plasma at the highest compression.PHYSICS LETTERS A,383(19),2285—2289.
MLA Zhang, G,et al."Nuclear probes of an out-of-equilibrium plasma at the highest compression".PHYSICS LETTERS A 383.19(2019):2285—2289.
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