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

We report on the first successful operation of a field-emitter-array cathode in a conventional L-band radio-frequency electron source. The cathode consisted of an array of $$\sim 10^6$$ diamond diamond tips on pyramids. Maximum current on the order of 15~mA were 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. Numerical simulations of the beam dynamics are also presented.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [2] ;  [2] ;  [5] ;  [2] ;  [4] ;  [4] ;  [6] ;  [6]
  1. Northern Illinois Center for Accelerator and Detector Development and Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA; Accelerator Physics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
  2. Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, USA
  3. Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, Tennessee 37235, USA; Vanderbilt Institute of Nanoscale Science and Engineering, Vanderbilt University, Nashville, Tennessee 37235, USA
  4. Northern Illinois Center for Accelerator and Detector Development and Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA
  5. Advanced Energy Systems, Inc., Medford, New York 11763, USA
  6. Accelerator Division, Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
Publication Date:
OSTI Identifier:
1289719
Report Number(s):
FERMILAB-PUB-13-323-APC; arXiv:1402.6999
Journal ID: ISSN 0003-6951; 1282951
DOE Contract Number:
AC02-07CH11359
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 26
Publisher:
American Institute of Physics (AIP)
Research Org:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS