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Download filePhotoelectric Emission Properties of Photocathode Materials
thesis
posted on 2016-02-17, 00:00 authored by Tuo LiIn a bid to further improve the performance of photocathodes, and to identify excellent
photocathodes, much research has been undertaken to understand the emission properties at
a fundamental level. The quality of photocathode generated electron beam is fundamentally
dependent upon the quality in both transverse and longitudinal (i.e., temporal) directions of
the electron pulses produced by their front-end laser-driven electron gun. In the transverse
spatial dimension, a high quality (high brightness) electron pulse requires a low normalized
spatial transverse rms emittance. It is the aim of this thesis to facilitate and demonstrate a
dramatic improvement in the performance of spatial-resolved research instruments by investi-
gating selected robust photocathode materials exhibiting laser-driven emission with a low rms
transverse momentum ∆pT .
In this thesis, I present my contributions to this cutting-edge research field by investigating
high-brightness photocathodes, which could generate bright electron beam (high quantum effi-
ciency and low spatial emittance). The field of photocathode analysis connects the root mean
square transverse momentum of electrons from solid-state photocathodes to their electronic
band structures, which thereby provides the consistent theoretical groundwork geared towards
selecting high brightness photocathode materials for electron pulse generation.
History
Advisor
Schroeder, Walter A.Department
PhysicsDegree Grantor
University of Illinois at ChicagoDegree Level
- Doctoral
Committee Member
Campuzano, Juan C. Ogut, Serdar Grein, Christoph Nicholls, AlanSubmitted date
2015-12Language
- en