Speakers
Masao Kuriki
(Hiroshima University)
Zachary Liptak
(Hiroshima University)
Description
GaAs cathode is a unique device generating a spin-polarized electron beam by photo-electron effect with a circularly polarized laser illumination. Negative Electron Affinity (NEA) surface which is artificially made has an essential role in spin polarization, but the NEA surface has limited vitality. In this study, we activated GaAs as NEA cathode by evaporating Cs, K, and Sb metal on its cleaned surface. The experimental results including the quantum efficiency spectrum and the lifetime will be presented.
Funding Agency
This work is partly supported by U.S.-Japan Science and Technology Cooperation Program in High Energy Physics.
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Primary author
Masao Kuriki
(Hiroshima University)
Co-authors
Lei Guo
(Nagoya University)
Xiuguang Jin
(High Energy Accelerator Research Organization)
Zachary Liptak
(Hiroshima University)
Naoto Yamamoto
(High Energy Accelerator Research Organization)
