Ion Motion Induced Emittance Growth of Matched Electron Beams in Plasma Wakefields

An, Weiming; Lu, Wei; Huang, Chengkun; Xu, Xinlu; Hogan, Mark J.; Joshi, Chan; Mori, Warren B.

doi:10.1103/PhysRevLett.118.244801

Ion Motion Induced Emittance Growth of Matched Electron Beams in Plasma Wakefields

Journal Article · Wed Jun 14 00:00:00 EDT 2017 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.118.244801· OSTI ID:1369393

An, Weiming ^[1]; Lu, Wei ^[2]; Huang, Chengkun ^[3]; Xu, Xinlu ^[1]; Hogan, Mark J. ^[4]; Joshi, Chan ^[1]; Mori, Warren B. ^[1]

Univ. of California, Los Angeles, CA (United States)
Tsinghua Univ., Beijing (China); Shanghai Jiao Tong Univ., Shanghai (China)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
SLAC National Accelerator Lab., Menlo Park, CA (United States)

Plasma-based acceleration is being considered as the basis for building a future linear collider. Nonlinear plasma wakefields have ideal properties for accelerating and focusing electron beams. Preservation of the emittance of nano-Coulomb beams with nanometer scale matched spot sizes in these wakefields remains a critical issue due to ion motion caused by their large space charge forces. We use fully resolved quasistatic particle-in-cell simulations of electron beams in hydrogen and lithium plasmas, including when the accelerated beam has different emittances in the two transverse planes. The projected emittance initially grows and rapidly saturates with a maximum emittance growth of less than 80% in hydrogen and 20% in lithium. The use of overfocused beams is found to dramatically reduce the emittance growth. In conclusion, the underlying physics that leads to the lower than expected emittance growth is elucidated.

View Accepted Manuscript (DOE)

Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-76SF00515; SC0008316; SC0010064; SC0014260

OSTI ID:: 1369393

Alternate ID(s):: OSTI ID: 1363983

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 118; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Accelerating field enhancement due to ion motion in plasma wakefield accelerators Minakov, V. A.; Sosedkin, A. P.; Lotov, K. V. Plasma Physics and Controlled Fusion, Vol. 61, Issue 11 https://doi.org/10.1088/1361-6587/ab41a7	journal	October 2019
Plasma wakefield linear colliders—opportunities and challenges Adli, Erik Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 377, Issue 2151 https://doi.org/10.1098/rsta.2018.0419	journal	June 2019

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