Paper |
Title |
Page |
PS04 |
Design of a Magnetic Quadrupole Pick-Up for the CERN PS
|
108 |
|
- A. Jansson, L. Søby, D.J. Williams
CERN, Geneva, Switzerland
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A quadrupole pick-up is sensitive to the quantity σ2x -
σ2y, where σx and σy are the horizontal and vertical
r.m.s. beam sizes. Since it is a non-invasive device, it is potentially
very useful for matching and emittance measurements. A magnetic
quadrupole pick-up has been developed for the CERN PS. By coupling to the
radial component of the magnetic field around the beam, it was possible
to eliminate the common-mode problem, which is usually a limiting factor
in the use of quadrupole pick-ups. This paper presents the final pick-up
design, which is the result of a series of simulations and test
prototypes. The performance of the pick-up and its associated electronics
is discussed. Preliminary results from the two pick-ups recently
installed in the PS machine are also presented.
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|
PM11 |
Injection Matching Studies Using Turn-By-Turn Beam Profile Measurements in the CERN PS
|
189 |
|
- M. Benedikt, Ch. Carli, Ch. Dutriat, A. Jansson, M. Giovannozzi, M. Martini, U. Raich
CERN, Geneva, Switzerland
|
|
|
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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