Ampère-Class Pulsed Field Emission from Carbon-Nanotube Cathodes in a Radiofrequency Resonator

Journal Article · Mon Dec 01 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4927052· OSTI ID:1252995

Mihalcea, D. ^[1]; Faillace, L. ^[2]; Hartzell, J. ^[2]; Panuganti, H. ^[1]; Boucher, S. M. ^[2]; Murokh, A. ^[2]; Piot, P. ^[3]; Thangaraj, J. C.T. ^[3]

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1. Northern Illinois U.
2. RadiaBeam Tech.
3. Fermilab

Pulsed field emission from cold carbon-nanotube cathodes placed in a radiofrequency resonant cavity was observed. The cathodes were located on the backplate of a conventional $$1+\frac{1}{2}$$-cell resonant cavity operating at 1.3-GHz and resulted in the production of bunch train with maximum average current close to 0.7 Amp\`ere. The measured Fowler-Nordheim characteristic, transverse emittance, and pulse duration are presented and, when possible, compared to numerical simulations. The implications of our results to high-average-current electron sources are briefly discussed.

• 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: 1252995
• Report Number(s): FERMILAB-PUB-14-527-APC; arXiv:1502.03040; 1343837
• Journal Information: Applied Physics Letters, Vol. 107, Issue 3; ISSN 0003-6951
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: English

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