IPAC'23 - 14th International Particle Accelerator Conference

First demonstration of spin-polarized electrons from gallium nitride photocathodes

TUODB3

9 May 2023, 12:10

20m

Sala Darsena

Contributed Oral Presentation MC3.T02: Electron Sources MC03.2 - Novel Particle Sources and Acceleration Techniques (Contributed)

Speaker

Samuel Levenson (Cornell University)

Description

For the first time, photoemission of spin-polarized electron beams from gallium nitride (GaN) photocathodes are observed and characterized. The spin polarizations of the emitted electrons from epitaxially grown hexagonal and cubic GaN photocathodes activated to Negative Electron Affinity (NEA) via cesium deposition are measured in a retarding-field Mott polarimeter.

Funding Agency

This work is supported by DOE grant DOE-DESC0021002.