Paper |
Title |
Page |
PT22 |
Measurement of the longitudinal phase space at the Photo Injector Test Facility at DESY Zeuthen
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222 |
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- J. Bähr, I. Bohnet, J.H. Han, M. Krasilnikov, D. Lipka, V. Miltchev, A. Oppelt, F. Stephan
DESY-Zeuthen, Deutsches Elektronen-Synchrotron, Zeuthen, Germany
- K. Flöttmann
DESY, Deutsches Elektronen-Synchrotron, Hamburg, Germany
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The photo injector test facility at DESY Zeuthen (PITZ) has been
developed with the aim to deliver low emittance electron beams and study
its characteristics for future applications at free electron lasers and
linear accelerators. The energy of the electron beam varies in the range
between 4 and 5 MeV. One of the important properties of the delivered
beam is the longitudinal phase space of the electron beam. Measurements
of the momentum distributions show a small energy spread. The principle
of the measurement of the bunch length will be discussed, time
resolutions will be shown and preliminary results will be given. The
design to measure the correlation between momentum and time distribution
of the electron bunch will be shown with calculated resolutions.
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PT29 |
Dark Current Measurements at the PITZ Rf Gun
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242 |
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- J.H. Han, I. Bohnet, M. Krasilnikov, F. Stephan
DESY-Zeuthen, Deutsches Elektronen-Synchrotron, Zeuthen, Germany
- K. Flöttmann
DESY, Deutsches Elektronen-Synchrotron, Hamburg, Germany
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For photoelectron rf guns with acceleration gradients of 40 MV/m or
higher at the photo cathode operated at the rf pulse length of 100 μs or
more, the amount of dark current might be comparable with the
photoelectron beam. Strong dark current can cause multipacting, radiation
damages and cryogenic losses. At the photo injector test facility at DESY
Zeuthen (PITZ) the dark current was measured with various solenoid setups
at the rf gun by Faraday cup. We compare the dark current behavior of
different photo cathodes. Experimental results are discussed with
simulations.
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