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PS07 |
New Schottky-Pickup for COSY-Jülich
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117 |
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- I. Mohos, J. Bojowald, J. Dietrich, F. Klehr
IKP, Forschungszentrum Jülich GmbH, Jülich, Germany
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A new Schottky-pickup for the Cooler Synchrotron COSY at the
Forschungszentrum Jlich was developed, tested and installed. The new
pickup with four diagonally arranged plates replaces the two 1 m long
Schottky-pickups used until now in COSY. The previous ones were removed
mainly to gain space for new installations (e.g. rf-cavity, experimental
devices), but also to increase the horizontal aperture. The available
space for the new pickup is only 0.8 m. The pickup plates can be combined
by means of relays to measure either in the horizontal or in the vertical
plane. The pickup can also be used either as a sensitive broadband beam
position monitor or as a tuneable narrowband pickup for Schottky-noise
analysis with ultahigh sensitivity. A new method for resonant tuning of
the Schottky-pickups for transversal measurements was developed. The
differentially excited resonant circuitry enhances the sensitivity by
about a factor of 30. The pickups are also used for dynamical tune
measurements (tune meter) in the acceleration ramp.
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