ePubs
The open archive for STFC research publications
Home
About ePubs
Content Policies
News
Help
Privacy/Cookies
Suggest an Enhancement
Contact ePubs
Full Record Details
Persistent URL
http://purl.org/net/epubs/work/10855956
Record Status
Checked
Record Id
10855956
Title
The commissioning of TESS: An experimental facility for measuring the electron energy distribution from photocathodes
Contributors
Prof. A.S. Terekhov (Institute of Semiconductor Physics, SB RAS, Novosibirsk 630090, Russia)
,
Dr. H.E. Scheibler (Institute of Semiconductor Physics, SB RAS, Novosibirsk 630090, Russia)
,
Dr. B.L. Militsyn (STFC Daresbury Laboratory, ASTeC & the Cockcroft Institute, Warrington WA4 4AD, UK)
,
Dr. T.C.Q. Noakes (STFC Daresbury Laboratory, ASTeC & the Cockcroft Institute, Warrington WA4 4AD, UK)
,
Dr. K.J. Middleman (STFC Daresbury Laboratory, ASTeC & the Cockcroft Institute, Warrington WA4 4AD, UK)
,
Mr. B.D. Fell (STFC Daresbury Laboratory, ASTeC & the Cockcroft Institute, Warrington WA4 4AD, UK)
,
Mr. R.J. Cash (STFC Daresbury Laboratory, ASTeC & the Cockcroft Institute, Warrington WA4 4AD, UK)
,
Dr. L.B. Jones (STFC Daresbury Laboratory, ASTeC & the Cockcroft Institute, Warrington WA4 4AD, UK) (Pr.Au.)
Abstract
ASTeC have developed an instrument to measure the transverse energy (etr) of electrons emitted from photocathode sources. The instrument (‘TESS’ for transverse energy spread spectrometer) is connected to our GaAs photocathode preparation facility (PPF) which is capable of producing photocathodes with quantum efficiencies (Q.E.) up to 20% at 635 nm [1, 2]. TESS is currently being used to study the emission properties of these photocathodes. The methodology is based on extracting a fA–scale electron beam from a small area of a photocathode source, and allowing it to expand under the influence of its transverse energy component while in flight between the electron source and a detector. Images of the electron emission footprint are analysed to measure the transverse energy distribution curve (TEDC), and the mean transverse energy extracted (MTE) from this. TESS is compatible with a number of different light sources, so can support measurements on various photocathode materials from the metal and semiconductor families. The system includes a piezo–electric leak valve allowing precision gas dosing to control the degradation state of the photocathode, and therefore its Q.E.. The system also supports cathode cooling to LN2 temperature at 77 K. The system has been commissioned recently, in collaboration with the Institute of Semiconductor Physics (ISP) at Novosibirsk. We present this TESS commissioning data for photoelectron emission from a GaAs photocathode.
Organisation
ASTeC
,
ASTeC-AP
,
ASTeC-VS
,
STFC
Keywords
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Paper In Conference Proceedings
In 35th International Free Electron Laser Conference (FEL '13), Manhattan, New York, U.S.A., August 26-30, 2013,
CI Preprints
(2013).
2013 Proc. FEL '1…ead measurements.pdf
2013
Showing record 1 of 1
Recent Additions
Browse Organisations
Browse Journals/Series
Login to add & manage publications and access information for OA publishing
Username:
Password:
Useful Links
Chadwick & RAL Libraries
SHERPA FACT
SHERPA RoMEO
SHERPA JULIET
Journal Checker Tool
Google Scholar