Development of a Durable, Large Area Cathode for Repetitive, Uniform Electron Beam Generation
Abstract
Electra is a large-aperture, krypton-fluoride laser under development for inertial fusion energy research. The laser will require dual 500 kV, 36 A/sq cm, uniform electron beams operating at 5 Hz. Experimental studies have been performed to develop an approx. 3000 sq cm cathode capable of generating a 110 kA, 100 ns flat top beam pulse with minimal current density variation (<10%), fast rise time (<40 ns), negligible gap closure (<1 cm/microsecond), and long lifetime (ultimately 10(exp 8) shots). Time resolved electrical and optical data from the study of various dielectric fiber, carbon, and metal/dielectric cathodes will be discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2002
- Accession Number
- ADA480618
Entities
People
- Frank Hegeler
- John D. Sethian
- Matthew C. Myers
- Moshe Friedman
Organizations
- United States Naval Research Laboratory