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Nano-patterned superconducting surface for high quantum efficiency cathode

United States Patent

9,589,757
March 7, 2017
View the Complete Patent at the US Patent & Trademark Office
Thomas Jefferson National Accelerator Facility - Visit the Technology Review Committee Website
A method for providing a superconducting surface on a laser-driven niobium cathode in order to increase the effective quantum efficiency. The enhanced surface increases the effective quantum efficiency by improving the laser absorption of the surface and enhancing the local electric field. The surface preparation method makes feasible the construction of superconducting radio frequency injectors with niobium as the photocathode. An array of nano-structures are provided on a flat surface of niobium. The nano-structures are dimensionally tailored to interact with a laser of specific wavelength to thereby increase the electron yield of the surface.
Hannon; Fay (Poquoson, VA), Musumeci; Pietro (Los Angeles, CA)
JEFFERSON SCIENCE ASSOCIATES, LLC (Newport News, VA)
14/ 862,640
20170084416
September 23, 2015
GOVERNMENT LICENSE RIGHTS This invention was made with government support under Management and Operating Contract No. DE-AC05-06OR23177 awarded by the Department of Energy. The United States Government has certain rights in the invention.