An Investigation of 10 to the 12th power W per sq cm Focused REB Deposition of Thick Aluminum Targets.
Abstract
The VUV-emission from 6061-T6 aluminum targets, exposed to an intense focused electron beam, and ions accelerated to the diode potential were examined to study the electron absorption mechanism for a 1 meV electron beam with current density of MA/sq cm. The VUV -emission was observed with aluminum cathode x-ray diode operated with and without 1/2 micrometer aluminum filters and a near normal incidence grating spectrograph. Carbon ions were observed with a Thomas mass spectrograph and their charge state used to estimate the anode plasma temperature. The VUV-emission and carbon charge states observed are consistent with classical electron deposition and indicate an anode surface temperature of a few eV with the peak temperature occurring at the time of impedance collapse.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1977
- Accession Number
- ADA042211
Entities
People
- D. J. Johnson
- D. J. Nagel
- W. F. Oliphant
Organizations
- United States Naval Research Laboratory