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Title: Photoelectron emission from metal surfaces induced by VUV-emission of filament driven hydrogen arc discharge plasma

Photoelectron emission measurements have been performed using a filament-driven multi-cusp arc discharge volume production H{sup −} ion source (LIISA). It has been found that photoelectron currents obtained with Al, Cu, Mo, Ta and stainless steel (SAE 304) are on the same order of magnitude. The photoelectron currents depend linearly on the discharge power. It is shown experimentally that photoelectron emission is significant only in the short wavelength range of hydrogen spectrum due to the energy dependence of the quantum efficiency. It is estimated from the measured data that the maximum photoelectron flux from plasma chamber walls is on the order of 1 A per kW of discharge power.
Authors:
; ; ; ;  [1]
  1. University of Jyväskylä, Department of Physics (Finland)
Publication Date:
OSTI Identifier:
22391398
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1655; Journal Issue: 1; Conference: NIBS 2014: 4. International Symposium on Negative Ions, Beams and Sources, Garching (Germany), 6-10 Oct 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ALUMINIUM; COPPER; ELECTRIC ARCS; EMISSION SPECTRA; ENERGY DEPENDENCE; FAR ULTRAVIOLET RADIATION; FILAMENTS; HYDROGEN; HYDROGEN IONS 1 MINUS; ION SOURCES; MOLYBDENUM; PHOTOELECTRIC EMISSION; PLASMA; QUANTUM EFFICIENCY; STAINLESS STEEL-304; TANTALUM