Ion Motion Induced Emittance Growth of Matched Electron Beams in Plasma Wakefields
- 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.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC02-76SF00515; SC0010064; SC0014260; SC0008316; ACI-1339893; PHY-1500630; ACI-1614949; 11425521; 11535006
- OSTI ID:
- 1369393
- Alternate ID(s):
- OSTI ID: 1363983
- Journal Information:
- Physical Review Letters, Vol. 118, Issue 24; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Plasma-based accelerators: then and now
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journal | August 2019 |
Accelerating field enhancement due to ion motion in plasma wakefield accelerators
|
journal | October 2019 |
Plasma wakefield linear colliders—opportunities and challenges
|
journal | June 2019 |
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