Development Program for a Large Planar Beam Electron Gun.
Abstract
The report presents results of a program to develop a lightweight, large planar beam electron gun. The program included design, fabrication, and test of a working model gun of less than 205 pounds with a 2000 sq cm output beam. The gun displays unique characteristics due to the use of parallel diodes, small-area thermionic emitters, titanium vacuum vessel, high-current capacity output window structure, and lightweight copper vacuum seals. Pulsed operation of the gun at voltages from 120 to 200 kv and pulse repetition frequencies up to 1000 Hz for 10- to 30-microsec pulses was a design requirement. Current densities of 9 ma/sq cm have been demonstrated at accelerating voltages up to 150 kv. Output beam uniformity has been measured by use of dosimeter paper. Uniformity of the beam is within 5 percent. Gun current efficiency as high as 70 percent has been measured.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1975
- Accession Number
- ADA016777
Entities
People
- Arthur H. Bauer