Electron Beam Emission from a Diamond-Amplifier Cathode

Journal Article · Fri Oct 15 04:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.164801· OSTI ID:21467026

Xiangyun, Chang; Qiong, Wu; Ben-Zvi, Ilan; Burrill, Andrew; Kewisch, Jorg; Rao, Triveni; Smedley, John; Erdong, Wang ^[1]; Muller, Erik M ^[2]; Busby, Richard; Dimitrov, Dimitre ^[3]

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1. Brookhaven National Laboratory, Upton, New York 11973 (United States)
2. Stony Brook University, Stony Brook, New York 11794 (United States)
3. Tech-X Corporation, 5621 Arapahoe Avenue Suite A, Boulder, Colorado 80303 (United States)

The diamond amplifier (DA) is a new device for generating high-current, high-brightness electron beams. Our transmission-mode tests show that, with single-crystal, high-purity diamonds, the peak current density is greater than 400 mA/mm{sup 2}, while its average density can be more than 100 mA/mm{sup 2}. The gain of the primary electrons easily exceeds 200, and is independent of their density within the practical range of DA applications. We observed the electron emission. The maximum emission gain measured was 40, and the bunch charge was 50 pC/0.5 mm{sup 2}. There was a 35% probability of the emission of an electron from the hydrogenated surface in our tests. We identified a mechanism of slow charging of the diamond due to thermal ionization of surface states that cancels the applied field within it. We also demonstrated that a hydrogenated diamond is extremely robust.

• OSTI ID: 21467026
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 16 Vol. 105; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
74 ATOMIC AND MOLECULAR PHYSICS
AMPLIFICATION
AMPLIFIERS
BEAM BUNCHING
BEAM CURRENTS
BEAM DYNAMICS
BEAM PRODUCTION
BEAMS
CARBON
CATHODES
CHEMICAL REACTIONS
CRYSTALS
CURRENT DENSITY
CURRENTS
DIAMONDS
DYNAMICS
ELECTRODES
ELECTRON BEAMS
ELECTRON EMISSION
ELECTRONIC EQUIPMENT
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
EQUIPMENT
FERMIONS
GAIN
HYDROGENATION
IONIZATION
LEPTON BEAMS
LEPTONS
MECHANICS
MINERALS
MONOCRYSTALS
NONMETALS
PARTICLE BEAMS
PROBABILITY
SURFACES