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Title: A spectral method for halo particle definition in intense mismatched beams

Abstract

An advanced spectral analysis of a mismatched charged particle beam propagating through a periodic focusing transport lattice is utilized in particle-in-cell (PIC) simulations. It is found that the betatron frequency distribution function of a mismatched space-charge-dominated beam has a bump-on-tail structure attributed to the beam halo particles. Based on this observation, a new spectral method for halo particle definition is proposed that provides the opportunity to carry out a quantitative analysis of halo particle production by a beam mismatch. In addition, it is shown that the spectral analysis of the mismatch relaxation process provides important insights into the emittance growth attributed to the halo formation and the core relaxation processes. Finally, the spectral method is applied to the problem of space-charge transport limits.

Authors:
; ;  [1]
  1. Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
Publication Date:
OSTI Identifier:
21537663
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 18; Journal Issue: 4; Other Information: DOI: 10.1063/1.3574665; (c) 2011 American Institute of Physics; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; CHARGED-PARTICLE TRANSPORT; DISTRIBUTION FUNCTIONS; FOCUSING; PARTICLE BEAMS; PARTICLE PRODUCTION; SPACE CHARGE; BEAMS; FUNCTIONS; RADIATION TRANSPORT

Citation Formats

Dorf, Mikhail A, Davidson, Ronald C, and Startsev, Edward A. A spectral method for halo particle definition in intense mismatched beams. United States: N. p., 2011. Web. doi:10.1063/1.3574665.
Dorf, Mikhail A, Davidson, Ronald C, & Startsev, Edward A. A spectral method for halo particle definition in intense mismatched beams. United States. https://doi.org/10.1063/1.3574665
Dorf, Mikhail A, Davidson, Ronald C, and Startsev, Edward A. 2011. "A spectral method for halo particle definition in intense mismatched beams". United States. https://doi.org/10.1063/1.3574665.
@article{osti_21537663,
title = {A spectral method for halo particle definition in intense mismatched beams},
author = {Dorf, Mikhail A and Davidson, Ronald C and Startsev, Edward A},
abstractNote = {An advanced spectral analysis of a mismatched charged particle beam propagating through a periodic focusing transport lattice is utilized in particle-in-cell (PIC) simulations. It is found that the betatron frequency distribution function of a mismatched space-charge-dominated beam has a bump-on-tail structure attributed to the beam halo particles. Based on this observation, a new spectral method for halo particle definition is proposed that provides the opportunity to carry out a quantitative analysis of halo particle production by a beam mismatch. In addition, it is shown that the spectral analysis of the mismatch relaxation process provides important insights into the emittance growth attributed to the halo formation and the core relaxation processes. Finally, the spectral method is applied to the problem of space-charge transport limits.},
doi = {10.1063/1.3574665},
url = {https://www.osti.gov/biblio/21537663}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 4,
volume = 18,
place = {United States},
year = {Fri Apr 15 00:00:00 EDT 2011},
month = {Fri Apr 15 00:00:00 EDT 2011}
}