Relativistic Positron Creation Using Ultraintense Short Pulse Lasers

被引：333

作者：

Chen, Hui ^{[1
]}

Wilks, Scott C. ^{[1
]}

Bonlie, James D. ^{[1
]}

Liang, Edison P. ^{[2
]}

Myatt, Jason ^{[3
]}

Price, Dwight F. ^{[1
]}

Meyerhofer, David D. ^{[3
]}

Beiersdorfer, Peter ^{[1
]}

机构：

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

[2] Rice Univ, Houston, TX 77005 USA

[3] Univ Rochester, Rochester, NY 14623 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 10期

关键词：

PAIR PRODUCTION; FEMTOSECOND-LASER; ELECTRON; PLASMA; CONDENSATION; GENERATION; TARGETS; PHOTON; BEAMS;

D O I：

10.1103/PhysRevLett.102.105001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We measure up to 2x10(10) positrons per steradian ejected out the back of similar to mm thick gold targets when illuminated with short (similar to 1 ps) ultraintense (similar to 1x10(20) W/cm(2)) laser pulses. Positrons are produced predominately by the Bethe-Heitler process and have an effective temperature of 2-4 MeV, with the distribution peaking at 4-7 MeV. The angular distribution of the positrons is anisotropic. Modeling based on the measurements indicate the positron density to be similar to 10(16) positrons/cm(3), the highest ever created in the laboratory.

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页数：4

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