Cesium coverage on molybdenum due to cesium ion bombardment

Journal Article · Mon Apr 21 04:00:00 EST 1986 · Appl. Phys. Lett.; (United States)

DOI:https://doi.org/10.1063/1.96592· OSTI ID:5901250

Tompa, G S; Carr, W E; Seidl, M

Cesium coverage due to Cs/sup +/ bombardment of a polycrystalline molybdenum surface was investigated in the incident energy range below 500 eV. When the surface is exposed to a Cs/sup +/ beam the work function decreases until steady state is reached with a total dose of less than roughly-equal1 x 10/sup 16/ ions/cm/sup 2/. The steady state work function reaches a minimum at an incident energy of roughly-equal100 eV and slowly increases with bombarding energy. Cesium coverage of a target is proportional to the ratio (1-..beta..)/..gamma.., where ..beta.. is the reflection coefficient and ..gamma.. is the sputter yield. This ratio is large for molybdenum because of its low mass and high binding energy. Implications of these results for H/sup -/ surface conversion sources are discussed.

• Research Organization: Department of Physics and Engineering Physics, Stevens Institute of Technology, Hoboken, New Jersey 07030
• OSTI ID: 5901250
• Journal Information: Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 48:16; ISSN APPLA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360106* -- Metals & Alloys-- Radiation Effects
640301 -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALI METALS
ANIONS
CESIUM
CESIUM IONS
CHARGED PARTICLES
COLLISIONS
CRYSTALS
DATA
ELEMENTS
EXPERIMENTAL DATA
FUNCTIONS
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
INFORMATION
ION COLLISIONS
ION IMPLANTATION
ION SOURCES
IONS
METALS
MOLYBDENUM
NUMERICAL DATA
PHYSICAL RADIATION EFFECTS
POLYCRYSTALS
RADIATION EFFECTS
SPUTTERING
TRANSITION ELEMENTS
WORK FUNCTIONS