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

Abstract

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 flat 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 (>1 ps). 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with the corrugation size similar to the gap between the plates, the analytical solutions of the wakefields are no longer applicable, and we resort to a field matching program to obtain the wakes.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:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1181367
Alternate Identifier(s):
OSTI ID: 1168436; OSTI ID: 1605007
Report Number(s):
SLAC-PUB-16195
Journal ID: ISSN 1098-4402; PRABFM; 010702
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article: Published Article
Journal Name:
Physical Review Special Topics. Accelerators and Beams
Additional Journal Information:
Journal Name: Physical Review Special Topics. Accelerators and Beams 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. https://doi.org/10.1103/PhysRevSTAB.18.010702
Zhang, Zhen, Bane, Karl, Ding, Yuantao, Huang, Zhirong, Iverson, Richard, Maxwell, Timothy, Stupakov, Gennady, and Wang, Lanfa. 2015. "Electron beam energy chirp control with a rectangular corrugated structure at the Linac Coherent Light Source". United States. https://doi.org/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 = {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 flat 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 (>1 ps). 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},
url = {https://www.osti.gov/biblio/1181367}, journal = {Physical Review Special Topics. Accelerators and Beams},
issn = {1098-4402},
number = 1,
volume = 18,
place = {United States},
year = {2015},
month = {1}
}

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

Citation Metrics:
Cited by: 18 works
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Works referenced in this record:

Surface impedance formalism for a metallic beam pipe with small corrugations
journal, December 2012


Operation of a free-electron laser from the extreme ultraviolet to the water window
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A compact X-ray free-electron laser emitting in the sub-ångström region
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First lasing and operation of an ångstrom-wavelength free-electron laser
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Highly coherent and stable pulses from the FERMI seeded free-electron laser in the extreme ultraviolet
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Impedance of a rectangular beam tube with small corrugations
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Corrugated pipe as a beam dechirper
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  • Bane, K. L. F.; Stupakov, G.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 690
  • https://doi.org/10.1016/j.nima.2012.07.001

Experimental Demonstration of Energy-Chirp Control in Relativistic Electron Bunches Using a Corrugated Pipe
journal, January 2014