Dense pair plasma generation by two laser pulses colliding in a cylinder channel

doi:10.1088/1674-1056/26/3/035202

Abstract An all-optical scheme for high-density pair plasmas generation is proposed by two laser pulses colliding in a cylinder channel. Two dimensional particle-in-cell simulations show that, when the first laser pulse propagates in the cylinder, electrons are extracted out of the cylinder inner wall and accelerated to high energies. These energetic electrons later run into the second counter-propagating laser pulse, radiating a large amount of high-energy gamma photons via the Compton back-scattering process. The emitted gamma photons then collide with the second laser pulse to initiate the Breit-Wheeler process for pairs production. Due to the strong self-generated fields in the cylinder, positrons are confined in the channel to form dense pair plasmas. Totally, the maximum density of pair plasmas can be 4.60×10²⁷ m^-3, for lasers with an intensity of 4×10²² W·cm^-2. Both the positron yield and density are tunable by changing the cylinder radius and the laser parameters. The generated dense pair plasmas can further facilitate investigations related to astrophysics and particle physics.

Keywords: pair plasma laser pulse simulation

Received: 28 August 2016
Revised: 14 November 2016
Accepted manuscript online:

PACS:	52.38.-r	(Laser-plasma interactions)
	32.80.Wr	(Other multiphoton processes)

Fund: Project supported by the National Natural Science Foundation (Grant Nos. 11475260, 11305264, 11622547, 11375265, and 11474360), the National Basic Research Program of China (Grant No. 2013CBA01504), the Research Project of National University of Defense Technology, China (Contract No. JC14-02-02), and the Science Challenge Program, China (Grant No. JCKY2016212A505).

Corresponding Authors: Yan-Yun Ma, Tong-Pu Yu
E-mail: yanyunma@126.com;tongpu@nudt.edu.cn

Cite this article:

Jian-Xun Liu(刘建勋), Yan-Yun Ma(马燕云), Tong-Pu Yu(余同普), Jun Zhao(赵军), Xiao-Hu Yang(杨晓虎), De-Bin Zou(邹德滨), Guo-Bo Zhang(张国博), Yuan Zhao(赵媛), Jing-Kang Yang(杨靖康), Han-Zhen Li(李汉臻), Hong-Bin Zhuo(卓红斌), Fu-Qiu Shao(邵福球), Shigeo Kawata Dense pair plasma generation by two laser pulses colliding in a cylinder channel 2017 Chin. Phys. B 26 035202

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Dense pair plasma generation by two laser pulses colliding in a cylinder channel

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