- 专利标题: NANO-PATTERNED SUPERCONDUCTING SURFACE FOR HIGH QUANTUM EFFICIENCY CATHODE
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申请号: US14862640申请日: 2015-09-23
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公开(公告)号: US20170084416A1公开(公告)日: 2017-03-23
- 发明人: Fay Hannon , Pietro Musumeci
- 申请人: JEFFERSON SCIENCE ASSOCIATES, LLC
- 主分类号: H01J9/12
- IPC分类号: H01J9/12 ; H01J40/06
摘要:
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.