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Title: DIAMOND AMPLIFIER FOR PHOTOCATHODES.

Abstract

We report a new approach to the generation of high-current, high-brightness electron beams. Primary electrons are produced by a photocathode (or other means) and are accelerated to a few thousand electron-volts, then strike a specially prepared diamond window. The large Secondary Electron Yield (SEY) provides a multiplication of the number of electrons by about two orders of magnitude. The secondary electrons drift through the diamond under an electric field and emerge into the accelerating proper of the ''gun'' through a Negative Electron Affinity surface of the diamond. The advantages of the new approach include the following: (1) Reduction of the number of primary electrons by the large SEY, i.e. a very low laser power in a photocathode producing the primaries. (2) Low thermal emittance due to the NEA surface and the rapid thermalization of the electrons. (3) Protection of the cathode from possible contamination from the gun, allowing the use of large quantum efficiency but sensitive cathodes. (4) Protection of the gun from possible contamination by the cathode, allowing the use of superconducting gun cavities. (5) Production of high average currents, up to ampere class. (6) Encapsulated design, making the ''load-lock'' systems unnecessary. This paper presents the criteria that needmore » to be taken into account in designing the amplifier.« less

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
DOE/OFFICE OF SCIENCE (US)
OSTI Identifier:
15009620
Report Number(s):
BNL-73169-2004-CP
R&D Project: KA-04-04; PO-24; TRN: US200429%%1594
DOE Contract Number:  
AC02-98CH10886
Resource Type:
Conference
Resource Relation:
Conference: 11TH AAC WORKSHOP, STONY BROOK, NY (US), 06/21/2004--06/26/2004; Other Information: PBD: 21 Jun 2004
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; DESIGN; DIAMONDS; ELECTRON BEAMS; PHOTOCATHODES; QUANTUM EFFICIENCY; SECONDARY EMISSION; ELECTRON GUNS; SUPERCONDUCTING DEVICES; AMPLIFIERS

Citation Formats

RAO, T, BEN-ZVI, I, BURRILL, A, CHANG, X, HULBERT, S, JOHNSON, P D, and KEWISCH, J. DIAMOND AMPLIFIER FOR PHOTOCATHODES.. United States: N. p., 2004. Web. doi:10.1016/j.diamond.2003.11.052.
RAO, T, BEN-ZVI, I, BURRILL, A, CHANG, X, HULBERT, S, JOHNSON, P D, & KEWISCH, J. DIAMOND AMPLIFIER FOR PHOTOCATHODES.. United States. https://doi.org/10.1016/j.diamond.2003.11.052
RAO, T, BEN-ZVI, I, BURRILL, A, CHANG, X, HULBERT, S, JOHNSON, P D, and KEWISCH, J. 2004. "DIAMOND AMPLIFIER FOR PHOTOCATHODES.". United States. https://doi.org/10.1016/j.diamond.2003.11.052. https://www.osti.gov/servlets/purl/15009620.
@article{osti_15009620,
title = {DIAMOND AMPLIFIER FOR PHOTOCATHODES.},
author = {RAO, T and BEN-ZVI, I and BURRILL, A and CHANG, X and HULBERT, S and JOHNSON, P D and KEWISCH, J},
abstractNote = {We report a new approach to the generation of high-current, high-brightness electron beams. Primary electrons are produced by a photocathode (or other means) and are accelerated to a few thousand electron-volts, then strike a specially prepared diamond window. The large Secondary Electron Yield (SEY) provides a multiplication of the number of electrons by about two orders of magnitude. The secondary electrons drift through the diamond under an electric field and emerge into the accelerating proper of the ''gun'' through a Negative Electron Affinity surface of the diamond. The advantages of the new approach include the following: (1) Reduction of the number of primary electrons by the large SEY, i.e. a very low laser power in a photocathode producing the primaries. (2) Low thermal emittance due to the NEA surface and the rapid thermalization of the electrons. (3) Protection of the cathode from possible contamination from the gun, allowing the use of large quantum efficiency but sensitive cathodes. (4) Protection of the gun from possible contamination by the cathode, allowing the use of superconducting gun cavities. (5) Production of high average currents, up to ampere class. (6) Encapsulated design, making the ''load-lock'' systems unnecessary. This paper presents the criteria that need to be taken into account in designing the amplifier.},
doi = {10.1016/j.diamond.2003.11.052},
url = {https://www.osti.gov/biblio/15009620}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jun 21 00:00:00 EDT 2004},
month = {Mon Jun 21 00:00:00 EDT 2004}
}

Conference:
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