Paper | Title | Other Keywords | Page | ||
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PT24 | Development of a Bunch-Length Monitor with Sub-Picosecond Time Resolution and Single-Shot Capability
Funding: SNF (Schweizer National Fonds) |
diagnostics, instrumentation, linac, electron, bunching | 228 | ||
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A bunch-length monitor with single-shot capability is under development
at the 100 MeV pre-injector LINAC of the Swiss Light Source (SLS). It is
based on the electro-optical effect in a ZnTe crystal induced by coherent
transition radiation (CTR). A spatial autocorrelation of the CTR in the
EO-crystal rotates the polarisation of a mode-locked Nd:YAG laser to
produce an image on an array detector representing the Fourier components
of the CTR spectrum. Up to now a theoretical model for the emission of
transition radiation has been developed in order to design optics
allowing efficient transport of the CTR onto the EO-crystal. The
frequency dependency of the CTR due to the finite size of the target
screen has been measured in the sub-THz regime at the SLS Linac. The
results strongly support the theoretical descriptions of the radiation
source. By expanding the intensity pattern in higher-order
Laguerre-Gaussian modes, the transmission through the optical transfer
system is calculated.
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