skip to main content

Title: Operation of an ungated diamond field-emission array cathode in a L-band radiofrequency electron source

We report on the operation of a field-emitter-array cathode in a conventional L-band radio-frequency electron source. The cathode consisted of an array of ∼10{sup 6} diamond tips on pyramids. Maximum current on the order of 15 mA was reached and the cathode did not show appreciable signs of fatigue after weeks of operation. The measured Fowler-Nordheim characteristics, transverse beam density, and current stability are discussed.
Authors:
 [1] ;  [2] ; ; ; ;  [3] ;  [4] ;  [2] ; ; ;  [1] ;  [5] ; ;  [6]
  1. Northern Illinois Center for Accelerator and Detector Development and Department of Physics, Northern Illinois University, DeKalb, Illinois 60115 (United States)
  2. (United States)
  3. Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235 (United States)
  4. Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, Tennessee 37235 (United States)
  5. Advanced Energy Systems, Inc., Medford, New York 11763 (United States)
  6. Accelerator Division, Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
Publication Date:
OSTI Identifier:
22303910
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 26; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CATHODES; CURRENTS; DENSITY; DIAMONDS; ELECTRON SOURCES; FIELD EMISSION; RADIOWAVE RADIATION; STABILITY