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- M. Benedikt, Ch. Carli, Ch. Dutriat, A. Jansson, M. Giovannozzi, M. Martini, U. Raich
CERN, Geneva, Switzerland
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The very small emittance beam needed for the LHC requires that the
emittance blow-up in its injector machines must be kept to a minimum.
Mismatch upon the beam transfer from one machine to the next is a
potential source of such blow-up. The CERN PS ring is equipped with 3
Secondary Emission Grids (SEM-Grids) which are used for emittance
measurement at injection. One of these has been converted to a multi-turn
mode, in which several tens of consecutive beam passages can be observed.
This allows the study of mismatch between the PS-Booster and the PS. This
paper describes the instrument and experimental results obtained during
the last year.
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