High Efficiency Uniform Wakefield Acceleration of a Positron Beam Using Stable Asymmetric Mode in a Hollow Channel Plasma

Zhou, Shiyu; Hua, Jianfei; An, Weiming; Mori, Warren B.; Joshi, Chan; Gao, Jie; Lu, Wei

doi:10.1103/physrevlett.127.174801

High Efficiency Uniform Wakefield Acceleration of a Positron Beam Using Stable Asymmetric Mode in a Hollow Channel Plasma

Journal Article · Fri Oct 22 00:00:00 EDT 2021 · Physical Review Letters

DOI:https://doi.org/10.1103/physrevlett.127.174801· OSTI ID:1980221

Zhou, Shiyu ^[1]; ^[2]; An, Weiming ^[3]; Mori, Warren B. ^[4]; Joshi, Chan ^[4]; Gao, Jie ^[5]; Lu, Wei ^[6]

Tsinghua Univ., Beijing (China); OSTI
Tsinghua Univ., Beijing (China)
Beijing Normal Univ. (China)
Univ. of California, Los Angeles, CA (United States)
Chinese Academy of Sciences (CAS), Beijing (China). Inst. of High Energy Physics (IHEP)
Tsinghua Univ., Beijing (China); Beijing Academy of Quantum Information Sciences (China)

Plasma wakefield acceleration in the blowout regime is particularly promising for high-energy acceleration of electron beams because of its potential to simultaneously provide large acceleration gradients and high energy transfer efficiency while maintaining excellent beam quality. However, no equivalent regime for positron acceleration in plasma wakes has been discovered to date. We show that after a short propagation distance, an asymmetric electron beam drives a stable wakefield in a hollow plasma channel that can be both accelerating and focusing for a positron beam. A high charge positron bunch placed at a suitable distance behind the drive bunch can beam-load or flatten the longitudinal wakefield and enhance the transverse focusing force, leading to high efficiency and narrow energy spread acceleration of the positrons. Three-dimensional quasistatic particle-in-cell simulations show that an over 30% energy extraction efficiency from the wake to the positrons and a 1% level energy spread can be simultaneously obtained. Further optimization is feasible.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of California, Los Angeles, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0010064

OSTI ID:: 1980221

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 127; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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