The bates polarized electron source

G. D. Cates; V. W. Hughes; R. Michaels; H. R. Schaefer; T. J. Gay; M. S. Lubell; R. Wilson; G. W. Dodson; K. A. Dow; S. B. Kowalski; K. Isakovich; K. S. Kumar; M. E. Schulze; P. A. Souder; D. H. Kim

doi:10.1016/0168-9002(89)90846-2

The bates polarized electron source

G. D. Cates, V. W. Hughes, R. Michaels, H. R. Schaefer, T. J. Gay, M. S. Lubell, R. Wilson, G. W. Dodson, K. A. Dow, S. B. Kowalski, K. Isakovich, K. S. Kumar, M. E. Schulze, P. A. Souder, D. H. Kim

Department of Physics

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Abstract

A polarized electron source, based on photoemission from GaAs, has been developed and installed at the MIT Bates Linear Accelerator Center. A multichamber vacuum system houses up to four GaAs crystals simultaneously, and is contained in a Faraday cage to provide about 300 keV in electrostatic acceleration. A modulated cw krypton ion laser is used to achieve stable operation during 15 μs pulses with a repetition rate of 600 Hz. The source has produced pre-injected peak currents in excess of 17 mA, and accelerated peak currents of 8 mA. The source has a calculated transverse phase space of 10^-3 πm_ec - cm. Developed for initial us in a parity violation measurement in elastic polarized e-¹²C scattering, the first beam polarization measurement was 0.36 ± 0.04, as determined by Møller scattering at 250 MeV. Subsequent beam polarization measurements have yielded polarizations as high as 0.40 ± 0.03.

Original language	English (US)
Pages (from-to)	293-317
Number of pages	25
Journal	Nuclear Inst. and Methods in Physics Research, A
Volume	278
Issue number	2
DOIs	https://doi.org/10.1016/0168-9002(89)90846-2
State	Published - Jun 1 1989

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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Cates, G. D., Hughes, V. W., Michaels, R., Schaefer, H. R., Gay, T. J., Lubell, M. S., Wilson, R., Dodson, G. W., Dow, K. A., Kowalski, S. B., Isakovich, K., Kumar, K. S., Schulze, M. E., Souder, P. A., & Kim, D. H. (1989). The bates polarized electron source. Nuclear Inst. and Methods in Physics Research, A, 278(2), 293-317. https://doi.org/10.1016/0168-9002(89)90846-2

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title = "The bates polarized electron source",

abstract = "A polarized electron source, based on photoemission from GaAs, has been developed and installed at the MIT Bates Linear Accelerator Center. A multichamber vacuum system houses up to four GaAs crystals simultaneously, and is contained in a Faraday cage to provide about 300 keV in electrostatic acceleration. A modulated cw krypton ion laser is used to achieve stable operation during 15 μs pulses with a repetition rate of 600 Hz. The source has produced pre-injected peak currents in excess of 17 mA, and accelerated peak currents of 8 mA. The source has a calculated transverse phase space of 10-3 πmec - cm. Developed for initial us in a parity violation measurement in elastic polarized e-12C scattering, the first beam polarization measurement was 0.36 ± 0.04, as determined by M{\o}ller scattering at 250 MeV. Subsequent beam polarization measurements have yielded polarizations as high as 0.40 ± 0.03.",

author = "Cates, {G. D.} and Hughes, {V. W.} and R. Michaels and Schaefer, {H. R.} and Gay, {T. J.} and Lubell, {M. S.} and R. Wilson and Dodson, {G. W.} and Dow, {K. A.} and Kowalski, {S. B.} and K. Isakovich and Kumar, {K. S.} and Schulze, {M. E.} and Souder, {P. A.} and Kim, {D. H.}",

note = "Funding Information: We would like to acknowledge the assistance of Ann Barber, John Glossen, Matt Goodman and Scott Patch on various aspects of this work . We would also like to acknowledge G. Lampel, D.T. Pierce, R.J. Celotta, A.B. McDonald, E. Reichert, and C.K. Sinclair for useful discussions. This work was supported by the US Department of Energy under grant numbers DE-FG02-84ER40243 (Yale Univ .), DE-FG02-84ER40146 (Syracuse Univ.), DE FG02-86-ER40304 (CCNY), DE-FG02-86-ER40276 (Harvard Univ.), and contract number DE-AC02-76ER03069 (MIT Bates Linear Accelerator Center). One of us (G.D.C.) would also like to acknowledge the support of the US Air Force Office of Scientific Research under Grant no . 88-0165 (Princeton Univ .) .",

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doi = "10.1016/0168-9002(89)90846-2",

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pages = "293--317",

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T1 - The bates polarized electron source

AU - Cates, G. D.

AU - Hughes, V. W.

AU - Michaels, R.

AU - Schaefer, H. R.

AU - Gay, T. J.

AU - Lubell, M. S.

AU - Wilson, R.

AU - Dodson, G. W.

AU - Dow, K. A.

AU - Kowalski, S. B.

AU - Isakovich, K.

AU - Kumar, K. S.

AU - Schulze, M. E.

AU - Souder, P. A.

AU - Kim, D. H.

N1 - Funding Information: We would like to acknowledge the assistance of Ann Barber, John Glossen, Matt Goodman and Scott Patch on various aspects of this work . We would also like to acknowledge G. Lampel, D.T. Pierce, R.J. Celotta, A.B. McDonald, E. Reichert, and C.K. Sinclair for useful discussions. This work was supported by the US Department of Energy under grant numbers DE-FG02-84ER40243 (Yale Univ .), DE-FG02-84ER40146 (Syracuse Univ.), DE FG02-86-ER40304 (CCNY), DE-FG02-86-ER40276 (Harvard Univ.), and contract number DE-AC02-76ER03069 (MIT Bates Linear Accelerator Center). One of us (G.D.C.) would also like to acknowledge the support of the US Air Force Office of Scientific Research under Grant no . 88-0165 (Princeton Univ .) .

PY - 1989/6/1

Y1 - 1989/6/1

N2 - A polarized electron source, based on photoemission from GaAs, has been developed and installed at the MIT Bates Linear Accelerator Center. A multichamber vacuum system houses up to four GaAs crystals simultaneously, and is contained in a Faraday cage to provide about 300 keV in electrostatic acceleration. A modulated cw krypton ion laser is used to achieve stable operation during 15 μs pulses with a repetition rate of 600 Hz. The source has produced pre-injected peak currents in excess of 17 mA, and accelerated peak currents of 8 mA. The source has a calculated transverse phase space of 10-3 πmec - cm. Developed for initial us in a parity violation measurement in elastic polarized e-12C scattering, the first beam polarization measurement was 0.36 ± 0.04, as determined by Møller scattering at 250 MeV. Subsequent beam polarization measurements have yielded polarizations as high as 0.40 ± 0.03.

AB - A polarized electron source, based on photoemission from GaAs, has been developed and installed at the MIT Bates Linear Accelerator Center. A multichamber vacuum system houses up to four GaAs crystals simultaneously, and is contained in a Faraday cage to provide about 300 keV in electrostatic acceleration. A modulated cw krypton ion laser is used to achieve stable operation during 15 μs pulses with a repetition rate of 600 Hz. The source has produced pre-injected peak currents in excess of 17 mA, and accelerated peak currents of 8 mA. The source has a calculated transverse phase space of 10-3 πmec - cm. Developed for initial us in a parity violation measurement in elastic polarized e-12C scattering, the first beam polarization measurement was 0.36 ± 0.04, as determined by Møller scattering at 250 MeV. Subsequent beam polarization measurements have yielded polarizations as high as 0.40 ± 0.03.

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DO - 10.1016/0168-9002(89)90846-2

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SN - 0168-9002

VL - 278

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EP - 317

JO - Nuclear Inst. and Methods in Physics Research, A

JF - Nuclear Inst. and Methods in Physics Research, A

IS - 2

ER -

The bates polarized electron source

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