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Title: 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:
 [1];  [1];  [1];  [2];  [1]
  1. Univ. of Colorado, Boulder, CO (United States). Dept. of Physics, Center for Integrated Plasma Studies
  2. Univ. of Colorado, Boulder, CO (United States). Dept. of Physics, Center for Integrated Plasma Studies; Tech-X Corporation, Boulder, CO (United States)
Publication Date:
Research Org.:
Univ. of Colorado, Boulder, CO (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
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 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. doi: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. doi: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 = {2019},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevAccelBeams.22.041304

Citation Metrics:
Cited by: 4 works
Citation information provided by
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    Works referencing / citing this record:

    Beam emittance preservation using Gaussian density ramps in a beam-driven plasma wakefield accelerator
    journal, June 2019

    • Litos, M. D.; Ariniello, R.; Doss, C. E.
    • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 377, Issue 2151
    • DOI: 10.1098/rsta.2018.0181