| Paper |
Title |
Other Keywords |
Page |
| IT05 |
The Comparison of signal Processing Systems for Beam Position Monitors
|
insertion, collider, electron, storage-ring |
12 |
| |
- G. Vismara
CERN, Geneva, Switzerland
| |
At first sight the problem of determining the beam
position from the ratio of the induced charges of the
opposite electrodes of a beam monitor seems trivial, but
up to now no unique solution has been found that fits the
various demands of all particle accelerators.
The purpose of this paper is to help instrumentalist in
choosing the best processing system for their particular
application.
The paper will present the different families in which
the processing systems can be grouped.
A general description of the operating principles with
relative advantages and disadvantages for the most
employed processing systems is also presented.
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| CT07 |
The ELETTRA Streak Camera: System Set-Up and First Results
|
synchrotron, electron, storage-ring, cathode |
72 |
| |
- M. Ferianis
ELETTRA, Sincrotrone Trieste, Trieste, Italy
| |
At ELETTRA, a Streak Camera system has been
installed and tested. The bunch length is a significant
machine parameter to measure, as it allows a direct
derivation of fundamental machine characteristics, like its
broadband impedance. At ELETTRA the Light from a
Storage Ring Dipole is delivered through an optical
system to an Optical Laboratory where it can be observed
and analysed.
The Streak Camera is equipped with different timebases,
allowing both single sweep and dual sweep
operation modes, including the Synchroscan mode. The
Synchroscan frequency equal to 250 MHz, which is half
of the ELETTRA RF frequency, allows the acquisition of
consecutive bunches, 2ns apart. To fully exploit the
performances of the Streak Camera, an optical path has
been arranged which includes a fast opto-electronic
shutter. By doing so, the optical power deposited on the
photo-cathode is reduced in the different ELETTRA
fillings.
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|
| PS19 |
Photon counting detectors for fill structure measurements at visible wavelengths
|
photon, storage-ring, diagnostics, electron |
144 |
| |
- H.L. Owen
CLRC, Daresbury Laboratory, Warrington, UK
| |
When making accurate measurements of the relative
populations of electron bunches in a storage ring, notably
in light sources operating with only a single bunch filled,
the method of time-correlated single photon counting
gives the greatest dynamic range. The timing resolution
and background noise level of the photon detector
employed is critically important in determining the overall
performance of the system; hitherto the best performance
has been obtained detecting X-ray photons using
avalanche photodiodes. On the SRS at Daresbury a visible
light diagnostic station offers greater ease of access to
instrumentation and operational advantages. A review is
given of the detector types which have been employed,
and the performances which can be obtained using visible
light.
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