A novel system for measurement of the transverse electron momentum distribution from photocathodes

The transverse momentum of electrons produced by a photocathode contributes significantly to the performance of several different types of accelerator-based light sources, such as Free Electron Lasers, as well as systems designed for ultrafast electron diffraction and dynamic transmission electron m...

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Bibliographic Details
Published inReview of scientific instruments Vol. 86; no. 1; p. 015103
Main Authors Feng, J., Nasiatka, J., Wan, W., Vecchione, T., Padmore, H. A.
Format Journal Article
LanguageEnglish
Published United States American Institute of Physics 01.01.2015
Subjects
Electron diffraction
Electrons
Emittance
Free electron lasers
Light sources
Photocathodes
Scientific apparatus & instruments
Transmission electron microscopy
Transverse momentum
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ISSN0034-6748
1089-7623
1089-7623
DOI10.1063/1.4904930

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Summary:The transverse momentum of electrons produced by a photocathode contributes significantly to the performance of several different types of accelerator-based light sources, such as Free Electron Lasers, as well as systems designed for ultrafast electron diffraction and dynamic transmission electron microscopy. Minimization of the transverse emittance from photocathodes is the subject of intensive research, and therefore measurement of this parameter is of great importance. Here, we describe a simple system that offers real time measurements of transverse emittance and can be easily integrated into the photocathode fabrication process.
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USDOE
AC02-05CH11231; SC0005713; KC0407-ALSJNT-I0013
ISSN:0034-6748
1089-7623
1089-7623
DOI:10.1063/1.4904930