Operation of an ungated diamond field-emission array cathode in a L-band radiofrequency electron source
- 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
- Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, USA
- 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
- Northern Illinois Center for Accelerator and Detector Development and Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA
- Advanced Energy Systems, Inc., Medford, New York 11763, USA
- Accelerator Division, Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
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.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1289719
- Report Number(s):
- FERMILAB-PUB-13-323-APC; arXiv:1402.6999; 1282951
- Journal Information:
- Applied Physics Letters, Vol. 104, Issue 26; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
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