Condensed Matter Student Seminar Series
to
Location
Clark Hall 701
Description
Title: Development of Improved Spin-Polarized Electron Photoemission Sources
Abstract: Spin-polarized electron beams are utilized in high energy and nuclear physics experiments, as well as in electron microscopy. GaAs-based photocathodes are the only viable sources of such beams in a photoinjector, although they are limited by extreme sensitivity to residual gasses and characterized by poor operational lifetimes. In my talk, I will introduce the mechanisms behind spin-polarized photoemission and associated measurement techniques. I will then discuss methods to improve the longevity of GaAs photocathodes, as well as investigations into GaN as a more-robust spin-polarized electron source.