Ion Motion Induced Emittance Growth of Matched Electron Beams in Plasma Wakefields
Abstract
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.
- Authors:
-
- 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)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1369393
- Alternate Identifier(s):
- OSTI ID: 1363983
- Grant/Contract Number:
- AC02-76SF00515; SC0010064; SC0014260; SC0008316; ACI-1339893; PHY-1500630; ACI-1614949; 11425521; 11535006
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 118; Journal Issue: 24; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
An, Weiming, Lu, Wei, Huang, Chengkun, Xu, Xinlu, Hogan, Mark J., Joshi, Chan, and Mori, Warren B. Ion Motion Induced Emittance Growth of Matched Electron Beams in Plasma Wakefields. United States: N. p., 2017.
Web. doi:10.1103/PhysRevLett.118.244801.
An, Weiming, Lu, Wei, Huang, Chengkun, Xu, Xinlu, Hogan, Mark J., Joshi, Chan, & Mori, Warren B. Ion Motion Induced Emittance Growth of Matched Electron Beams in Plasma Wakefields. United States. https://doi.org/10.1103/PhysRevLett.118.244801
An, Weiming, Lu, Wei, Huang, Chengkun, Xu, Xinlu, Hogan, Mark J., Joshi, Chan, and Mori, Warren B. Wed .
"Ion Motion Induced Emittance Growth of Matched Electron Beams in Plasma Wakefields". United States. https://doi.org/10.1103/PhysRevLett.118.244801. https://www.osti.gov/servlets/purl/1369393.
@article{osti_1369393,
title = {Ion Motion Induced Emittance Growth of Matched Electron Beams in Plasma Wakefields},
author = {An, Weiming and Lu, Wei and Huang, Chengkun and Xu, Xinlu and Hogan, Mark J. and Joshi, Chan and Mori, Warren B.},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.118.244801},
journal = {Physical Review Letters},
number = 24,
volume = 118,
place = {United States},
year = {Wed Jun 14 00:00:00 EDT 2017},
month = {Wed Jun 14 00:00:00 EDT 2017}
}
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Works referencing / citing this record:
Plasma-based accelerators: then and now
journal, August 2019
- Joshi, C.
- Plasma Physics and Controlled Fusion, Vol. 61, Issue 10
Accelerating field enhancement due to ion motion in plasma wakefield accelerators
journal, October 2019
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Plasma wakefield linear colliders—opportunities and challenges
journal, June 2019
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