Transverse beam dynamics in a plasma density ramp
Abstract
An electron beam experiences chromatic emittance growth in a plasma-based accelerator if it is not matched to the focusing force in the plasma wake. A ramped plasma density profile at the entrance and exit of the plasma source can control the focusing of the beam into and out of the plasma accelerator, limiting emittance growth. Here, we present a comprehensive, analytic theory to describe the transverse beam dynamics and emittance growth in a nearly arbitrary plasma ramp profile. For a given incoming beam, this theory can be used to determine the length of the ramp required to correctly focus the electron beam, the optimal location of the beam’s vacuum focus, and the chromatic emittance growth in the ramp. In addition, the theory can be used to determine the effect that errors in the beam focusing and plasma profile have on the emittance of the beam. This paper illustrates two example ramps to demonstrate the theory: one that provides very fast focusing for beam matching, and one that is robust to errors in the plasma density profile.
- Authors:
- Publication Date:
- Research Org.:
- Univ. of Colorado, Boulder, CO (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1509936
- Alternate Identifier(s):
- OSTI ID: 1573372
- Grant/Contract Number:
- SC0017906
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Accelerators and Beams
- Additional Journal Information:
- Journal Name: Physical Review Accelerators and Beams Journal Volume: 22 Journal Issue: 4; Journal ID: ISSN 2469-9888
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; Plasma Wakefield Acceleration Beam Matching Emittance Ramp
Citation Formats
Ariniello, R., Doss, C. E., Hunt-Stone, K., Cary, J. R., and Litos, M. D. Transverse beam dynamics in a plasma density ramp. United States: N. p., 2019.
Web. doi:10.1103/PhysRevAccelBeams.22.041304.
Ariniello, R., Doss, C. E., Hunt-Stone, K., Cary, J. R., & Litos, M. D. Transverse beam dynamics in a plasma density ramp. United States. https://doi.org/10.1103/PhysRevAccelBeams.22.041304
Ariniello, R., Doss, C. E., Hunt-Stone, K., Cary, J. R., and Litos, M. D. Tue .
"Transverse beam dynamics in a plasma density ramp". United States. https://doi.org/10.1103/PhysRevAccelBeams.22.041304.
@article{osti_1509936,
title = {Transverse beam dynamics in a plasma density ramp},
author = {Ariniello, R. and Doss, C. E. and Hunt-Stone, K. and Cary, J. R. and Litos, M. D.},
abstractNote = {An electron beam experiences chromatic emittance growth in a plasma-based accelerator if it is not matched to the focusing force in the plasma wake. A ramped plasma density profile at the entrance and exit of the plasma source can control the focusing of the beam into and out of the plasma accelerator, limiting emittance growth. Here, we present a comprehensive, analytic theory to describe the transverse beam dynamics and emittance growth in a nearly arbitrary plasma ramp profile. For a given incoming beam, this theory can be used to determine the length of the ramp required to correctly focus the electron beam, the optimal location of the beam’s vacuum focus, and the chromatic emittance growth in the ramp. In addition, the theory can be used to determine the effect that errors in the beam focusing and plasma profile have on the emittance of the beam. This paper illustrates two example ramps to demonstrate the theory: one that provides very fast focusing for beam matching, and one that is robust to errors in the plasma density profile.},
doi = {10.1103/PhysRevAccelBeams.22.041304},
journal = {Physical Review Accelerators and Beams},
number = 4,
volume = 22,
place = {United States},
year = {Tue Apr 30 00:00:00 EDT 2019},
month = {Tue Apr 30 00:00:00 EDT 2019}
}
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https://doi.org/10.1103/PhysRevAccelBeams.22.041304
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