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Title: Feasibility of obtaining short electron-beam pulses from a Van de Graaff 3-MV accelerator using laser-photoelectron emission from a cold trioxide cathode

Abstract

Production of electron-beam pulses with a 700-ps FWHM duration, using laser-photoelectron emission from a cold trioxide cathode in a 3-MV Van de Graaff accelerator has been demonstrated. At 70-kW laser power (lambda = 337.2 nm) a current of about 1 mA has been measured which means a cathode quantum efficiency of 10/sup -7/. An electron transit time jitter of about 40 ps has been measured, to be attributed to voltage fluctuations on the accelerator tube electrodes resulting from the charging belt system. The results are discussed with respect to the feasibility to produce short pulses with a 1-nC total charge, taking into account the quantum efficiency of 10/sup -4/ measured in a test setup for the cold trioxide cathode. Larger quantum efficiency for the accelerator cathode and decrease of the transit time jitter are the main goals set for development of the Van de Graaff accelerator as a radiation source for very high time-resolution experiments in radiation chemistry and physics.

Authors:
; ;
Publication Date:
Research Org.:
Interuniversitair Reactor Instituut, Mekelweg 15, 2629 JB Delft, The Netherlands
OSTI Identifier:
5491563
Resource Type:
Journal Article
Journal Name:
Rev. Sci. Instrum.; (United States)
Additional Journal Information:
Journal Volume: 57:9
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CATHODES; PHOTOEMISSION; ELECTRON BEAMS; BEAM PRODUCTION; BEAM PULSERS; PULSE TECHNIQUES; VAN DE GRAAFF ACCELERATORS; ELECTRON SOURCES; QUANTUM EFFICIENCY; ACCELERATORS; BEAMS; EFFICIENCY; ELECTRODES; ELECTROSTATIC ACCELERATORS; EMISSION; LEPTON BEAMS; PARTICLE BEAMS; PARTICLE SOURCES; RADIATION SOURCES; SECONDARY EMISSION; 640301* - Atomic, Molecular & Chemical Physics- Beams & their Reactions

Citation Formats

Luthjens, L H, Hom, M L, and Vermeulen, M J.W. Feasibility of obtaining short electron-beam pulses from a Van de Graaff 3-MV accelerator using laser-photoelectron emission from a cold trioxide cathode. United States: N. p., 1986. Web. doi:10.1063/1.1138688.
Luthjens, L H, Hom, M L, & Vermeulen, M J.W. Feasibility of obtaining short electron-beam pulses from a Van de Graaff 3-MV accelerator using laser-photoelectron emission from a cold trioxide cathode. United States. doi:10.1063/1.1138688.
Luthjens, L H, Hom, M L, and Vermeulen, M J.W. Mon . "Feasibility of obtaining short electron-beam pulses from a Van de Graaff 3-MV accelerator using laser-photoelectron emission from a cold trioxide cathode". United States. doi:10.1063/1.1138688.
@article{osti_5491563,
title = {Feasibility of obtaining short electron-beam pulses from a Van de Graaff 3-MV accelerator using laser-photoelectron emission from a cold trioxide cathode},
author = {Luthjens, L H and Hom, M L and Vermeulen, M J.W.},
abstractNote = {Production of electron-beam pulses with a 700-ps FWHM duration, using laser-photoelectron emission from a cold trioxide cathode in a 3-MV Van de Graaff accelerator has been demonstrated. At 70-kW laser power (lambda = 337.2 nm) a current of about 1 mA has been measured which means a cathode quantum efficiency of 10/sup -7/. An electron transit time jitter of about 40 ps has been measured, to be attributed to voltage fluctuations on the accelerator tube electrodes resulting from the charging belt system. The results are discussed with respect to the feasibility to produce short pulses with a 1-nC total charge, taking into account the quantum efficiency of 10/sup -4/ measured in a test setup for the cold trioxide cathode. Larger quantum efficiency for the accelerator cathode and decrease of the transit time jitter are the main goals set for development of the Van de Graaff accelerator as a radiation source for very high time-resolution experiments in radiation chemistry and physics.},
doi = {10.1063/1.1138688},
journal = {Rev. Sci. Instrum.; (United States)},
number = ,
volume = 57:9,
place = {United States},
year = {1986},
month = {9}
}