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Title: Measurements of wake-induced electron beam deflection in a dechirper at the Linac Coherent Light Source

Abstract

The RadiaBeam/SLAC dechirper, a structure consisting of pairs of flat, metallic, corrugated plates, has been installed just upstream of the undulators in the Linac Coherent Light Source (LCLS). As a dechirper, with the beam passing between the plates on axis, longitudinal wakefields are induced that can remove unwanted energy chirp in the beam. However, with the beam passing off axis, strong transverse wakes are also induced. This mode of operation has already been used for the production of intense, multicolor photon beams using the fresh-slice technique, and is being used to develop a diagnostic for attosecond bunch length measurements. Here we measure, as a function of offset, the strength of the transverse wakefields that are excited between the two plates, and also for the case of the beam passing near to a single plate. We compare with analytical formulas from the literature, and find good agreement. As a result, this report presents the first systematic measurements of the transverse wake strength in a dechirper, one that has been excited by a bunch with the short pulse duration and high energy found in an x-ray free electron laser.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1400341
Alternate Identifier(s):
OSTI ID: 1417670
Grant/Contract Number:  
[AC02-76SF00515; SC0009550]
Resource Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
[Journal Name: Physical Review Accelerators and Beams Journal Volume: 20 Journal Issue: 10]; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Zemella, Johann, Bane, Karl, Fisher, Alan, Guetg, Marc, Huang, Zhirong, Iverson, Richard, Krejcik, Patrick, Lutman, Alberto, Maxwell, Timothy, Novokhatski, Alexander, Stupakov, Gennady, Zhang, Zhen, Harrison, Mark, and Ruelas, Marcos. Measurements of wake-induced electron beam deflection in a dechirper at the Linac Coherent Light Source. United States: N. p., 2017. Web. doi:10.1103/PhysRevAccelBeams.20.104403.
Zemella, Johann, Bane, Karl, Fisher, Alan, Guetg, Marc, Huang, Zhirong, Iverson, Richard, Krejcik, Patrick, Lutman, Alberto, Maxwell, Timothy, Novokhatski, Alexander, Stupakov, Gennady, Zhang, Zhen, Harrison, Mark, & Ruelas, Marcos. Measurements of wake-induced electron beam deflection in a dechirper at the Linac Coherent Light Source. United States. doi:10.1103/PhysRevAccelBeams.20.104403.
Zemella, Johann, Bane, Karl, Fisher, Alan, Guetg, Marc, Huang, Zhirong, Iverson, Richard, Krejcik, Patrick, Lutman, Alberto, Maxwell, Timothy, Novokhatski, Alexander, Stupakov, Gennady, Zhang, Zhen, Harrison, Mark, and Ruelas, Marcos. Thu . "Measurements of wake-induced electron beam deflection in a dechirper at the Linac Coherent Light Source". United States. doi:10.1103/PhysRevAccelBeams.20.104403.
@article{osti_1400341,
title = {Measurements of wake-induced electron beam deflection in a dechirper at the Linac Coherent Light Source},
author = {Zemella, Johann and Bane, Karl and Fisher, Alan and Guetg, Marc and Huang, Zhirong and Iverson, Richard and Krejcik, Patrick and Lutman, Alberto and Maxwell, Timothy and Novokhatski, Alexander and Stupakov, Gennady and Zhang, Zhen and Harrison, Mark and Ruelas, Marcos},
abstractNote = {The RadiaBeam/SLAC dechirper, a structure consisting of pairs of flat, metallic, corrugated plates, has been installed just upstream of the undulators in the Linac Coherent Light Source (LCLS). As a dechirper, with the beam passing between the plates on axis, longitudinal wakefields are induced that can remove unwanted energy chirp in the beam. However, with the beam passing off axis, strong transverse wakes are also induced. This mode of operation has already been used for the production of intense, multicolor photon beams using the fresh-slice technique, and is being used to develop a diagnostic for attosecond bunch length measurements. Here we measure, as a function of offset, the strength of the transverse wakefields that are excited between the two plates, and also for the case of the beam passing near to a single plate. We compare with analytical formulas from the literature, and find good agreement. As a result, this report presents the first systematic measurements of the transverse wake strength in a dechirper, one that has been excited by a bunch with the short pulse duration and high energy found in an x-ray free electron laser.},
doi = {10.1103/PhysRevAccelBeams.20.104403},
journal = {Physical Review Accelerators and Beams},
number = [10],
volume = [20],
place = {United States},
year = {2017},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevAccelBeams.20.104403

Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

Figures / Tables:

FIG. 1 FIG. 1: Three corrugations of a horizontal dechirper. A rectangular coordinate system is centered on the symmetry axis of the chamber. The blue ellipse represents an electron beam propagating along the $z$ axis.

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Works referenced in this record:

Analytical formulas for short bunch wakes in a flat dechirper
journal, August 2016


Using surface impedance for calculating wakefields in flat geometry
journal, March 2015


Time-resolved measurement of quadrupole wakefields in corrugated structures
journal, February 2016


Fresh-slice multicolour X-ray free-electron lasers
journal, October 2016

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Femtosecond x-ray pulse temporal characterization in free-electron lasers using a transverse deflector
journal, December 2011


First lasing and operation of an ångstrom-wavelength free-electron laser
journal, August 2010


Frequency chirped self-amplified spontaneous-emission free-electron lasers
journal, May 2003


Wakefield potentials of corrugated structures
journal, October 2015


Temporal profile measurements of relativistic electron bunch based on wakefield generation
journal, February 2016


Calculation of wakefields in 2D rectangular structures
journal, October 2015

  • Zagorodnov, I.; Bane, K. L. F.; Stupakov, G.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 18, Issue 10
  • DOI: 10.1103/PhysRevSTAB.18.104401

Self-amplified spontaneous emission FEL with energy-chirped electron beam and its application for generation of attosecond x-ray pulses
journal, May 2006

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Corrugated pipe as a beam dechirper
journal, October 2012

  • Bane, K. L. F.; Stupakov, G.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 690
  • DOI: 10.1016/j.nima.2012.07.001

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


    Works referencing / citing this record:

    Generation of coherent two-color pulses at two adjacent harmonics in a seeded free-electron laser
    journal, February 2018


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