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Title: Sensitive fast electron spectrometer in adjustable triode configuration with pulsed tunable laser for research on photo-induced field emission cathodes

Abstract

We have completed an ultra-high vacuum system for sensitive fast electron spectroscopy from cold cathodes in triode configuration under high electric fields E (<100 MV/m) and pulsed tunable laser illumination (3.5 ns, 10 Hz, hν = 0.5-5.9 eV, and 0.3-17 mJ). The cathodes are prepared and inserted under clean room conditions and can be precisely 3D-positioned, cooled or heated (77-400 K). Commissioning results with the upgraded system are presented. Field emission measurements with a W tip yielded an energy resolution of 14 meV at 4 eV pass energy and a precise determination of the emitter work function, size, and temperature. Photoemission spectroscopy of short electron bunches from a virgin and laser-ablated S-GaP crystal and quantum efficiency measurements revealed surface states, energy relaxation, and band structure effects. In conclusion, this novel system is ready now for the development and characterization of photo-induced field emission cathodes.

Authors:
; ; ;  [1]
  1. FB C Physics Department, University of Wuppertal, 42119 Wuppertal (Germany)
Publication Date:
OSTI Identifier:
22392452
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 86; Journal Issue: 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CATHODES; ELECTRIC FIELDS; ELECTRON SPECTROMETERS; ENERGY RESOLUTION; FIELD EMISSION; GALLIUM PHOSPHIDES; LASERS; PHOTOELECTRON SPECTROSCOPY; PULSES; QUANTUM EFFICIENCY

Citation Formats

Mingels, S., E-mail: smingels@uni-wuppertal.de, Porshyn, V., Bornmann, B., Lützenkirchen-Hecht, D., and Müller, G. Sensitive fast electron spectrometer in adjustable triode configuration with pulsed tunable laser for research on photo-induced field emission cathodes. United States: N. p., 2015. Web. doi:10.1063/1.4919011.
Mingels, S., E-mail: smingels@uni-wuppertal.de, Porshyn, V., Bornmann, B., Lützenkirchen-Hecht, D., & Müller, G. Sensitive fast electron spectrometer in adjustable triode configuration with pulsed tunable laser for research on photo-induced field emission cathodes. United States. https://doi.org/10.1063/1.4919011
Mingels, S., E-mail: smingels@uni-wuppertal.de, Porshyn, V., Bornmann, B., Lützenkirchen-Hecht, D., and Müller, G. 2015. "Sensitive fast electron spectrometer in adjustable triode configuration with pulsed tunable laser for research on photo-induced field emission cathodes". United States. https://doi.org/10.1063/1.4919011.
@article{osti_22392452,
title = {Sensitive fast electron spectrometer in adjustable triode configuration with pulsed tunable laser for research on photo-induced field emission cathodes},
author = {Mingels, S., E-mail: smingels@uni-wuppertal.de and Porshyn, V. and Bornmann, B. and Lützenkirchen-Hecht, D. and Müller, G.},
abstractNote = {We have completed an ultra-high vacuum system for sensitive fast electron spectroscopy from cold cathodes in triode configuration under high electric fields E (<100 MV/m) and pulsed tunable laser illumination (3.5 ns, 10 Hz, hν = 0.5-5.9 eV, and 0.3-17 mJ). The cathodes are prepared and inserted under clean room conditions and can be precisely 3D-positioned, cooled or heated (77-400 K). Commissioning results with the upgraded system are presented. Field emission measurements with a W tip yielded an energy resolution of 14 meV at 4 eV pass energy and a precise determination of the emitter work function, size, and temperature. Photoemission spectroscopy of short electron bunches from a virgin and laser-ablated S-GaP crystal and quantum efficiency measurements revealed surface states, energy relaxation, and band structure effects. In conclusion, this novel system is ready now for the development and characterization of photo-induced field emission cathodes.},
doi = {10.1063/1.4919011},
url = {https://www.osti.gov/biblio/22392452}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 4,
volume = 86,
place = {United States},
year = {Wed Apr 15 00:00:00 EDT 2015},
month = {Wed Apr 15 00:00:00 EDT 2015}
}