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Title: Experimental study of coherent synchrotron radiation in the emittance exchange line at the A0-photoinjector

Abstract

Next generation accelerators will require a high current, low emittance beam with a low energy spread. Such accelerators will employ advanced beam conditioning systems such as emittance exchanger to manipulate high brightness beams. One of the goals of the Fermilab A0 photoinjector is to investigate the transverse to longitudinal emittance exchange principle. Coherent synchrotron radiation could limit high current operation of the emittance exchanger. In this paper, we report on the preliminary experimental and simulation study of the coherent synchroton radiation (CSR) in the emittance exchange line at A0 photoinjector.

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
988433
Report Number(s):
FERMILAB-CONF-10-317-APC
TRN: US1006681
DOE Contract Number:
AC02-07CH11359
Resource Type:
Conference
Resource Relation:
Journal Name: AIP Conf.Proc.1299:643-646,2010; Conference: Presented at 14th Advanced Accelerator Concepts Workshop, Annapolis, Maryland, 13-19 Jun 2010
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; BRIGHTNESS; FERMILAB; RADIATIONS; SIMULATION; SYNCHROTRON RADIATION; Accelerators

Citation Formats

Thangaraj, Jayakar C.T., Thurman-Keup, R., Johnson, A., Lumpkin, A.H., Edwards, H., Ruan, J., Santucci, J., Sun, Y.E.-, Church, M., /Fermilab, Piot, P., and /Fermilab /Northern Illinois U. Experimental study of coherent synchrotron radiation in the emittance exchange line at the A0-photoinjector. United States: N. p., 2010. Web.
Thangaraj, Jayakar C.T., Thurman-Keup, R., Johnson, A., Lumpkin, A.H., Edwards, H., Ruan, J., Santucci, J., Sun, Y.E.-, Church, M., /Fermilab, Piot, P., & /Fermilab /Northern Illinois U. Experimental study of coherent synchrotron radiation in the emittance exchange line at the A0-photoinjector. United States.
Thangaraj, Jayakar C.T., Thurman-Keup, R., Johnson, A., Lumpkin, A.H., Edwards, H., Ruan, J., Santucci, J., Sun, Y.E.-, Church, M., /Fermilab, Piot, P., and /Fermilab /Northern Illinois U. 2010. "Experimental study of coherent synchrotron radiation in the emittance exchange line at the A0-photoinjector". United States. doi:. https://www.osti.gov/servlets/purl/988433.
@article{osti_988433,
title = {Experimental study of coherent synchrotron radiation in the emittance exchange line at the A0-photoinjector},
author = {Thangaraj, Jayakar C.T. and Thurman-Keup, R. and Johnson, A. and Lumpkin, A.H. and Edwards, H. and Ruan, J. and Santucci, J. and Sun, Y.E.- and Church, M. and /Fermilab and Piot, P. and /Fermilab /Northern Illinois U.},
abstractNote = {Next generation accelerators will require a high current, low emittance beam with a low energy spread. Such accelerators will employ advanced beam conditioning systems such as emittance exchanger to manipulate high brightness beams. One of the goals of the Fermilab A0 photoinjector is to investigate the transverse to longitudinal emittance exchange principle. Coherent synchrotron radiation could limit high current operation of the emittance exchanger. In this paper, we report on the preliminary experimental and simulation study of the coherent synchroton radiation (CSR) in the emittance exchange line at A0 photoinjector.},
doi = {},
journal = {AIP Conf.Proc.1299:643-646,2010},
number = ,
volume = ,
place = {United States},
year = 2010,
month = 8
}

Conference:
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  • Next generation accelerators will require a high current, low emittance beam with a low energy spread. Such accelerators will employ advanced beam conditioning systems such as emittance exchangers to manipulate high brightness beams. One of the goals of the Fermilab A0 photoinjector is to investigate the transverse to longitudinal emittance exchange principle. Coherent synchrotron radiation could limit high current operation of the emittance exchanger. In this paper, we report on the preliminary experimental and simulation study of the coherent synchroton radiation (CSR) in the emittance exchange line at the A0 photoinjector.
  • Future accelerators will employ advanced beam conditioning systems such as emittance exchangers to manipulate high brightness beams. Coherent synchrotron radiation (CSR) in the dipoles could limit the performance of the emittance exchanger. In this paper, we report the experimental studies on measuring CSR and its effects on the beam at the A0 photoinjector in the emittance exchange line. After reporting the CSR power measurements, we report on the diagnostic scheme based on a weak skew quad in the emittance exchange line to study the CSR effects on the beam and other beam dynamics. In this work, we have reported onmore » CSR measurements and the effect of skew quad on the dogleg line with the 5-cell turned on and off. We plan to study CSR effects on the bunch with the 5-cell on at larger chirp. This is will not only increase the CSR self-effect but also reduce the beamsize at the screen for convenient beamsize measurements.« less
  • One of the goals of the Fermilab A0 photoinjector is to experimentally investigate the transverse to longitudinal emittance exchange (EEX) principle. Coherent synchrotron radiation in the emittance exchange line could limit the performance of the emittance exchanger at short bunch lengths. In this paper, we present experimental and simulation studies of the coherent synchrotron radiation (CSR) in the emittance exchange line at the A0 photoinjector. We report on time-resolved CSR studies using a skew-quadrupole technique. We also demonstrate the advantages of running the EEX with an energy chirped beam.
  • A novel source of transform-limited pulses of coherent electromagnetic radiation relying on the synchrotron radiation process in a fast wave guiding structure is investigated. An ultrashort electron bunch transversally accelerated by a periodic external field is considered. At grazing, where the bunch and group velocities are matched, the duration of the resulting ultrawideband chirped pulse is governed by group velocity dispersion instead of slippage. Because of the intimate connection between the rate of chirping and the bandwidth, the corresponding pulse duration is shown to be very close to the Fourier transform limit. In addition, the propagation of such chirped pulsesmore » through a guiding structure with negative group velocity dispersion is investigated both theoretically and computationally. The spectral and temporal characteristics of the chirped and compressed pulses are derived analytically. Detailed computer calculations complement this theoretical analysis. In addition, a detailed description of the X-band photoinjector facility capable of producing trains of 100, 1 nC, subpicosecond photoelectron bunches at a micropulse repetition rate of 2.142 GHz and with a normalized emittance of 0.75 {pi} mm-mrad (at 0:1 nC) is given.« less