Scaling the Yield of Laser-Driven Electron-Positron Jets to Laboratory Astrophysical Applications

被引：118

作者：

Chen, Hui ^{[1
]}

Fiuza, F. ^{[1
,2
]}

Link, A. ^{[1
]}

Hazi, A. ^{[1
]}

Hill, M. ^{[3
]}

Hoarty, D. ^{[3
]}

James, S. ^{[3
]}

Kerr, S.

Meyerhofer, D. D. ^{[4
]}

Myatt, J. ^{[4
]}

Park, J. ^{[1
]}

Sentoku, Y. ^{[5
]}

Williams, G. J. ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[2] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA

[3] Directorate Sci & Technol, Reading RG7 4PR, Berks, England

[4] Univ Rochester, Laser Energet Lab, Rochester, NY 14623 USA

[5] Univ Nevada, Reno, NV 89557 USA

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 21期

关键词：

PARTICLE-ACCELERATION; MAGNETIC-FIELD; PLASMA; GENERATION; INSTABILITY; SIMULATION; SHOCK;

D O I：

10.1103/PhysRevLett.114.215001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report new experimental results obtained on three different laser facilities that show directed laser-driven relativistic electron-positron jets with up to 30 times larger yields than previously obtained and a quadratic (similar to E-L(2)) dependence of the positron yield on the laser energy. This favorable scaling stems from a combination of higher energy electrons due to increased laser intensity and the recirculation of MeV electrons in the mm-thick target. Based on this scaling, first principles simulations predict the possibility of using such electron-positron jets, produced at upcoming high-energy laser facilities, to probe the physics of relativistic collisionless shocks in the laboratory.

引用

页数：5

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