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Title: Electron beam energy chirp control with a rectangular corrugated structure at the Linac Coherent Light Source

Abstract

In this study, electron beam energy chirp is an important parameter that affects the bandwidth and performance of a linac-based, free-electron laser. In this paper we study the wakefields generated by a beam passing between at metallic plates with small corrugations, and then apply such a device as a passive dechirper for the Linac Coherent Light Source (LCLS) energy chirp control with a multi-GeV and femtosecond electron beam. Similar devices have been tested in several places at relatively low energies (~100 MeV) and with relatively long bunches (> 1ps). In the parameter regime of the LCLS dechirper, with the corrugation size similar to the gap between the plates, the analytical solutions of the wakefields are no longer applicable, and we resort to a field matching program to obtain the wakes. Based on the numerical calculations, we fit the short-range, longitudinal wakes to simple formulas, valid over a large, useful parameter range. Finally, since the transverse wakefields - both dipole and quadrupole-are strong, we compute and include them in beam dynamics simulations to investigate the error tolerances when this device is introduced in the LCLS.

Authors:
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [2]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States); Tsinghua Univ., Beijing (China)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1181367
Alternate Identifier(s):
OSTI ID: 1168436
Report Number(s):
SLAC-PUB-16195
Journal ID: ISSN 1098-4402; PRABFM
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article: Published Article
Journal Name:
Physical Review Special Topics. Accelerators and Beams
Additional Journal Information:
Journal Volume: 18; Journal Issue: 1; Journal ID: ISSN 1098-4402
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; XFEL

Citation Formats

Zhang, Zhen, Bane, Karl, Ding, Yuantao, Huang, Zhirong, Iverson, Richard, Maxwell, Timothy, Stupakov, Gennady, and Wang, Lanfa. Electron beam energy chirp control with a rectangular corrugated structure at the Linac Coherent Light Source. United States: N. p., 2015. Web. doi:10.1103/PhysRevSTAB.18.010702.
Zhang, Zhen, Bane, Karl, Ding, Yuantao, Huang, Zhirong, Iverson, Richard, Maxwell, Timothy, Stupakov, Gennady, & Wang, Lanfa. Electron beam energy chirp control with a rectangular corrugated structure at the Linac Coherent Light Source. United States. doi:10.1103/PhysRevSTAB.18.010702.
Zhang, Zhen, Bane, Karl, Ding, Yuantao, Huang, Zhirong, Iverson, Richard, Maxwell, Timothy, Stupakov, Gennady, and Wang, Lanfa. Fri . "Electron beam energy chirp control with a rectangular corrugated structure at the Linac Coherent Light Source". United States. doi:10.1103/PhysRevSTAB.18.010702.
@article{osti_1181367,
title = {Electron beam energy chirp control with a rectangular corrugated structure at the Linac Coherent Light Source},
author = {Zhang, Zhen and Bane, Karl and Ding, Yuantao and Huang, Zhirong and Iverson, Richard and Maxwell, Timothy and Stupakov, Gennady and Wang, Lanfa},
abstractNote = {In this study, electron beam energy chirp is an important parameter that affects the bandwidth and performance of a linac-based, free-electron laser. In this paper we study the wakefields generated by a beam passing between at metallic plates with small corrugations, and then apply such a device as a passive dechirper for the Linac Coherent Light Source (LCLS) energy chirp control with a multi-GeV and femtosecond electron beam. Similar devices have been tested in several places at relatively low energies (~100 MeV) and with relatively long bunches (> 1ps). In the parameter regime of the LCLS dechirper, with the corrugation size similar to the gap between the plates, the analytical solutions of the wakefields are no longer applicable, and we resort to a field matching program to obtain the wakes. Based on the numerical calculations, we fit the short-range, longitudinal wakes to simple formulas, valid over a large, useful parameter range. Finally, since the transverse wakefields - both dipole and quadrupole-are strong, we compute and include them in beam dynamics simulations to investigate the error tolerances when this device is introduced in the LCLS.},
doi = {10.1103/PhysRevSTAB.18.010702},
journal = {Physical Review Special Topics. Accelerators and Beams},
number = 1,
volume = 18,
place = {United States},
year = {Fri Jan 30 00:00:00 EST 2015},
month = {Fri Jan 30 00:00:00 EST 2015}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevSTAB.18.010702

Citation Metrics:
Cited by: 18 works
Citation information provided by
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