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Title: ILC @ SLAC R&D Program for a Polarized RF Gun

Abstract

Photocathode rf guns produce high-energy low-emittance electron beams. DC guns utilizing GaAs photocathodes have proven successful for generating polarized electron beams for accelerators, but they require rf bunching systems that significantly increase the transverse emittance of the beam. With higher extraction field and beam energy, rf guns can support higher current densities at the cathode. The source laser system can then be used to generate the high peak current, relatively low duty-factor micropulses required by the ILC without the need for post-extraction rf bunching. The net result is that the injection system for a polarized rf gun can be identical to that for an unpolarized rf gun. However, there is some uncertainty as to the survivability of an activated GaAs cathode in the environment of an operating rf gun. Consequently, before attempting to design a polarized rf gun for the ILC, SLAC plans to develop an rf test gun to demonstrate the rf operating conditions suitable for an activated GaAs cathode.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
875812
Report Number(s):
SLAC-PUB-11657
TRN: US0600801
DOE Contract Number:
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: Contributed to 11th International Workshop on Polarized Sources and Targets (PST05), Tokyo, Japan, 14-17 Nov 2005
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; CATHODES; DESIGN; ELECTRON BEAMS; LASERS; PHOTOCATHODES; STANFORD LINEAR ACCELERATOR CENTER; TARGETS; Accelerators,ACCPHY

Citation Formats

Clendenin, J.E., Brachman, A., Dowell, D.H., Garwin, E.L., Ioakemidi, K., Kirby, R.E., Maruyama, T., Miller, R.A., Prescott, C.Y., Wang, J.W., /SLAC, Lewellen, J.W., /Argonne, Prepost, R., and /Wisconsin U., Madison. ILC @ SLAC R&D Program for a Polarized RF Gun. United States: N. p., 2006. Web.
Clendenin, J.E., Brachman, A., Dowell, D.H., Garwin, E.L., Ioakemidi, K., Kirby, R.E., Maruyama, T., Miller, R.A., Prescott, C.Y., Wang, J.W., /SLAC, Lewellen, J.W., /Argonne, Prepost, R., & /Wisconsin U., Madison. ILC @ SLAC R&D Program for a Polarized RF Gun. United States.
Clendenin, J.E., Brachman, A., Dowell, D.H., Garwin, E.L., Ioakemidi, K., Kirby, R.E., Maruyama, T., Miller, R.A., Prescott, C.Y., Wang, J.W., /SLAC, Lewellen, J.W., /Argonne, Prepost, R., and /Wisconsin U., Madison. Wed . "ILC @ SLAC R&D Program for a Polarized RF Gun". United States. doi:. https://www.osti.gov/servlets/purl/875812.
@article{osti_875812,
title = {ILC @ SLAC R&D Program for a Polarized RF Gun},
author = {Clendenin, J.E. and Brachman, A. and Dowell, D.H. and Garwin, E.L. and Ioakemidi, K. and Kirby, R.E. and Maruyama, T. and Miller, R.A. and Prescott, C.Y. and Wang, J.W. and /SLAC and Lewellen, J.W. and /Argonne and Prepost, R. and /Wisconsin U., Madison},
abstractNote = {Photocathode rf guns produce high-energy low-emittance electron beams. DC guns utilizing GaAs photocathodes have proven successful for generating polarized electron beams for accelerators, but they require rf bunching systems that significantly increase the transverse emittance of the beam. With higher extraction field and beam energy, rf guns can support higher current densities at the cathode. The source laser system can then be used to generate the high peak current, relatively low duty-factor micropulses required by the ILC without the need for post-extraction rf bunching. The net result is that the injection system for a polarized rf gun can be identical to that for an unpolarized rf gun. However, there is some uncertainty as to the survivability of an activated GaAs cathode in the environment of an operating rf gun. Consequently, before attempting to design a polarized rf gun for the ILC, SLAC plans to develop an rf test gun to demonstrate the rf operating conditions suitable for an activated GaAs cathode.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 25 00:00:00 EST 2006},
month = {Wed Jan 25 00:00:00 EST 2006}
}

Conference:
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