Surface Production of Negative Hydrogen Ions.
Abstract
Production of negative hydrogen ions by sputtering adsorbed hydrogen from a molybdenum surface bombarded with cesium ions has been investigated. The negative hydrogen yield (number of negative hydrogen ions sputtered per incident cesium ion) is largest when the workfunction of the surface is minimized by appropriate cesium coverage. The yield has a maximum value of 0.5 at cesium ion energy of 750 eV and approaches zero at 150 eV cesium energy. The angular distribution of the hydrogen ions is close to a gaussian distribution with a standard deviation of 3 degrees, approximately independent of the bombarding energy. This means that the negative hydrogen ions have a Maxwellian distribution in parallel energies with a temperature between 0.3 to 0.5 percent of the bombarding energy.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 29, 1984
- Accession Number
- ADA145437
Entities
People
- M. Seidl
Organizations
- Stevens Institute of Technology