Dense pair plasma generation by two laser pulses colliding in a cylinder channel
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 ac...
Saved in:
| Published in | Chinese physics B Vol. 26; no. 3; pp. 361 - 368 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.03.2017
|
| Online Access | Get full text |
Cover
Loading…
| Summary: | 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 × 10^27 m%-3, for lasers with an intensity of 4 × 10^22 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. |
|---|---|
| Bibliography: | Jian-Xun Liu1,2, Yan-Yun Ma1,3,4, Tong-Pu Yu1,3, Jun Zhao1, Xiao-Hu Yang1, De-Bin Zou1 , Guo-Bo Zhang1, Yuan Zhao1, Jing-Kang Yang1 , Han-Zhen Li1,Hong-Bin Zhuo1, Fu-Qiu Shao1, and Shigeo Kawata5（ 1 College of Science, National University of Defense Technology, Changsha 410073, China 2 College of Electronic Engineering, Wuhan 430019, China 3 IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China 4Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621000, China5 Center for Optical Research and Education, Graduate School of Engineering, Utsunomiya University, 7-1-2 Yohtoh, Utsunomiya 321-8585, Japan） 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 × 10^27 m%-3, for lasers with an intensity of 4 × 10^22 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. pair plasma, laser pulse, simulation 11-5639/O4 |
| ISSN: | 1674-1056 2058-3834 |
| DOI: | 10.1088/1674-1056/26/3/035202 |