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Title: Widening and distortion of the particle energy distribution by chromaticity in quasi-isochronous rings

Abstract

This paper reports the observation of beam energy widening and distortion from Gaussian due to a nonvanishing horizontal chromaticity at a quasi-isochronous storage ring. The result originates from an average path-length dependence on the betatron oscillation amplitudes, which is intimately correlated to the transverse chromaticities. It is the first experimental validation of the impact of such a nonlinear transverse-longitudinal coupling effect on the equilibrium beam characteristics in a storage ring. The results could be important for quasi-isochronous rings, steady-state microbunching, nonscaling fixed-field alternate gradient accelerators, etc., where very small momentum compaction or large chromaticity is required.

Authors:
ORCiD logo [1];  [2];  [3];  [2];  [1]; ORCiD logo [4];  [2]; ORCiD logo [2];  [2];  [2];  [1]; ORCiD logo [2]
  1. Tsinghua Univ., Beijing (China)
  2. Physikalisch-Technische Bundesanstalt (PTB), Berlin (Germany)
  3. Tsinghua Univ., Beijing (China); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Helmholtz-Zentrum Berlin (HZB), (Germany)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1633199
Grant/Contract Number:  
AC02-76SF00515; 20191081195
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Volume: 23; Journal Issue: 4; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; Beam dynamics; Higher order beam dynamics; Single-particle dynamics

Citation Formats

Deng, X. J., Klein, R., Chao, A. W., Hoehl, A., Huang, W. H., Li, J., Lubeck, J., Petenev, Y., Ries, M., Seiler, I., Tang, C. X., and Feikes, J. Widening and distortion of the particle energy distribution by chromaticity in quasi-isochronous rings. United States: N. p., 2020. Web. doi:10.1103/physrevaccelbeams.23.044001.
Deng, X. J., Klein, R., Chao, A. W., Hoehl, A., Huang, W. H., Li, J., Lubeck, J., Petenev, Y., Ries, M., Seiler, I., Tang, C. X., & Feikes, J. Widening and distortion of the particle energy distribution by chromaticity in quasi-isochronous rings. United States. https://doi.org/10.1103/physrevaccelbeams.23.044001
Deng, X. J., Klein, R., Chao, A. W., Hoehl, A., Huang, W. H., Li, J., Lubeck, J., Petenev, Y., Ries, M., Seiler, I., Tang, C. X., and Feikes, J. Thu . "Widening and distortion of the particle energy distribution by chromaticity in quasi-isochronous rings". United States. https://doi.org/10.1103/physrevaccelbeams.23.044001. https://www.osti.gov/servlets/purl/1633199.
@article{osti_1633199,
title = {Widening and distortion of the particle energy distribution by chromaticity in quasi-isochronous rings},
author = {Deng, X. J. and Klein, R. and Chao, A. W. and Hoehl, A. and Huang, W. H. and Li, J. and Lubeck, J. and Petenev, Y. and Ries, M. and Seiler, I. and Tang, C. X. and Feikes, J.},
abstractNote = {This paper reports the observation of beam energy widening and distortion from Gaussian due to a nonvanishing horizontal chromaticity at a quasi-isochronous storage ring. The result originates from an average path-length dependence on the betatron oscillation amplitudes, which is intimately correlated to the transverse chromaticities. It is the first experimental validation of the impact of such a nonlinear transverse-longitudinal coupling effect on the equilibrium beam characteristics in a storage ring. The results could be important for quasi-isochronous rings, steady-state microbunching, nonscaling fixed-field alternate gradient accelerators, etc., where very small momentum compaction or large chromaticity is required.},
doi = {10.1103/physrevaccelbeams.23.044001},
journal = {Physical Review Accelerators and Beams},
number = 4,
volume = 23,
place = {United States},
year = {Thu Apr 30 00:00:00 EDT 2020},
month = {Thu Apr 30 00:00:00 EDT 2020}
}

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Figures / Tables:

TABLE I TABLE I: Parameters of the MLS in the experiment.

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Works referenced in this record:

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.