• Open Access

Optimization of positrons generation based on laser wakefield electron acceleration

Yuchi Wu, Dan Han, Tiankui Zhang, Kegong Dong, Bin Zhu, Yonghong Yan, and Yuqiu Gu
Phys. Rev. Accel. Beams 19, 081303 – Published 23 August 2016

Abstract

Laser based positron represents a new particle source with short pulse duration and high charge density. Positron production based on laser wakefield electron acceleration (LWFA) has been investigated theoretically in this paper. Analytical expressions for positron spectra and yield have been obtained through a combination of LWFA and cascade shower theories. The maximum positron yield and corresponding converter thickness have been optimized as a function of driven laser power. Under the optimal condition, high energy (>100MeV) positron yield up to 5×1011 can be produced by high power femtosecond lasers at ELI-NP. The percentage of positrons shows that a quasineutral electron-positron jet can be generated by setting the converter thickness greater than 5 radiation lengths.

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  • Received 23 April 2015

DOI:https://doi.org/10.1103/PhysRevAccelBeams.19.081303

This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Accelerators & Beams

Authors & Affiliations

Yuchi Wu1,2, Dan Han1, Tiankui Zhang1, Kegong Dong1, Bin Zhu1, Yonghong Yan1, and Yuqiu Gu1,2

  • 1Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, CAEP, Mianyang, Sichuan 621900, China
  • 2IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China

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Vol. 19, Iss. 8 — August 2016

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