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| THPOW016 |
Transverse Energy Spread Measurements from GaAs Photocathodes at Variable Wavelengths |
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- T.C.Q. Noakes, R. Beech, L.B. Jones, B.L. Militsyn
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
- H.E. Scheibler, A.S. Terekhov
ISP, Novosibirsk, Russia
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The transverse energy spread spectrometer (TESS) is an instrument specially developed at Daresbury Laboratory to measure the intrinsic transverse and longitudinal energy distributions from photocathode materials. Early work on the instrument has focussed on its use for the characterisation of GaAs photocathodes such as those commonly used in DC photoinjectors. More recently work has been conducted to extend the range of materials which can be evaluated using this apparatus, in particular by incorporating a monochromated white light source. New results are presented using the white light source to measure the energy spread of a GaAs photocathode across a range of different wavelengths to evaluate how this changes with excess energy.
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| DOI • |
reference for this paper
※ DOI:10.18429/JACoW-IPAC2016-THPOW016
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