A model for the stationary cesium coverage on a converter surface in a cesium seeded hydrogen discharge
- 15 September 1985
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 58 (6) , 2317-2325
- https://doi.org/10.1063/1.335953
Abstract
A model is presented for the mechanism which establishes the dynamic equilibrium cesium coverage on a W(110) converter surface in the discharge chamber of a negative hydrogen ion source. The charge state of cesium particles arriving at the converter surface is found to be a crucial parameter. A coverage greater than 0.26 monolayers cannot be maintained if the cesium component is highly ionized. The corresponding negative hydrogen ion formation probability is far from optimum. This situation is probably present in all high-density surface conversion negative ion sources employed nowadays.This publication has 19 references indexed in Scilit:
- The scattering of hydrogen from a cesiated tungsten surfacePublished by Elsevier ,2002
- Charge and energy transfer in collisions of Cs+ ions with a cesiated W(110) surfaceJournal of Applied Physics, 1985
- Neutral and ionized alkaline metal bombardment type heavy negative-ion source (NIABNIS)Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1984
- A universal relation for the sputtering yield of monatomic solids at normal ion incidenceNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1984
- Cesiated porous molybdenum converter for intense negative ion sourcesReview of Scientific Instruments, 1984
- Formation of H− by scattering H+ on a cesiated polycrystalline tungsten surfaceJournal of Applied Physics, 1983
- A semiempirical formula for the energy dependence of the sputtering yieldRadiation Effects, 1981
- The trapping of potassium atoms by a polycrystalline tungsten surface as a function of energy and angle of incidenceSurface Science, 1976
- Molecular beam study of the desorption of cesium ions from tungsten crystalsSurface Science, 1972
- The Evaporation of Atoms, Ions and Electrons from Caesium Films on TungstenPhysical Review B, 1933