Ultra low emittance electron beams from multi-alkali antimonide photocathode operated with infrared light

Journal Article · Mon Mar 28 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4945091· OSTI ID:22591517

Cultrera, L.; Gulliford, C.; Bartnik, A.; Lee, H.; Bazarov, I. ^[1]

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1. Cornell Laboratory for Accelerator-Based Sciences and Education, Cornell University, Ithaca, New York 14853 (United States)

The intrinsic emittance of electron beams generated from a multi-alkali photocathode operated in a high voltage DC gun is reported. The photocathode showed sensitivity extending to the infrared part of the spectrum up to 830 nm. The measured intrinsic emittances of electron beams generated with light having wavelength longer than 800 nm are approaching the limit imposed by the thermal energy of electrons at room temperature with quantum efficiencies comparable to metallic photocathodes used in operation of modern photoinjectors.

• OSTI ID: 22591517
• Journal Information: Applied Physics Letters, Vol. 108, Issue 13; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRIC POTENTIAL
ELECTRON BEAMS
ELECTRON GUNS
OPERATION
PHOTOCATHODES
QUANTUM EFFICIENCY
SENSITIVITY
SPECTRA
TEMPERATURE RANGE 0273-0400 K
VISIBLE RADIATION
WAVELENGTHS