Dependence of H sup minus production upon the work function of a Mo surface in a cesiated hydrogen discharge

Journal Article · Tue May 15 00:00:00 EDT 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.345153· OSTI ID:6986425

Wada, M; Pyle, R V; Stearns, J W ^[1]

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1. Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720 (USA)

The photoelectric work function of a cesiated molybdenum converter surface in a cesiated hydrogen discharge and the negative-hydrogen-ion (H{sup {minus}}) current produced at the surface were simultaneously measured. With the negative bias potential of the converter constant, the H{sup {minus}} yield increased exponentially as the work function was decreased by introducing Cs into the discharge. The yield of H{sup {minus}} current was always higher for a higher bias potential on the surface, provided the measured surface work function was nearly the same. When the concentration of Cs in a discharge was nearly constant, the bias potential of the surface at which the H{sup {minus}} production became maximum was observed. At this bias potential, the surface work function was close to the work-function minimum.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6986425
• Journal Information: Journal of Applied Physics; (USA), Vol. 67:10; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CESIUM
ELECTRIC DISCHARGES
HYDROGEN
HYDROGEN IONS 1 MINUS
ION SOURCES
MOLYBDENUM
WORK FUNCTIONS
ELECTRIC CURRENTS
SURFACES
ALKALI METALS
ANIONS
CHARGED PARTICLES
CURRENTS
ELEMENTS
FUNCTIONS
HYDROGEN IONS
IONS
METALS
NONMETALS
TRANSITION ELEMENTS
360104* - Metals & Alloys- Physical Properties