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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/12206291
Record Status
Checked
Record Id
12206291
Title
The Evolution of the Transverse Energy Distribution of Electrons from a GaAs Photocathode as a Function of its Degradation State
Contributors
L Jones (STFC Daresbury Lab., and Cockcroft Inst.)
,
BL Militsyn (STFC Daresbury Lab., and Cockcroft Inst.)
,
T Noakes (STFC Daresbury Lab., and Cockcroft Inst.)
,
HE Scheibler
,
AS Terekhov
Abstract
The brightness of a photoelectron injector is fundamentally limited by the mean longitudinal and transverse energy distributions of the photoelectrons emitted from its photocathode, and the electron beam brightness is increased significantly if the mean values of these quantities are reduced. ASTeC have commissioned a Transverse Energy Spread Spectrometer (TESS – an experimental facility designed to measure these transverse and longitudinal energy distributions) which can be used for III-V semiconductor, alkali antimonide/telluride and metal photocathode research. GaAs photocathodes were activated in our photocathode preparation facility (PPF)**, then transferred to TESS under XHV conditions and progressively degraded through controlled exposure to oxygen. We present commissioning data and initial measurements showing the evolution of the transverse energy distribution of electrons from GaAs photocathodes as a function of their degradation state.
Organisation
ASTeC
,
CI
,
STFC
Keywords
ASTeC 2014-2015
,
particle sources
,
electron sources
,
alternative acceleration techniques
Funding Information
Related Research Object(s):
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Language
English (EN)
Type
Details
URI(s)
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Year
Paper In Conference Proceedings
In 6th International Particle Accelerator Conference (IPAC'2015), Richmond, Virginia, USA, 3-8 May 2015, (2015): 1748-1751.
https://jacowfs.j…/papers/tupje055.pdf
2015
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