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Title |
Other Keywords |
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| CT03 |
Performance of the Digital BPM System for the Swiss Light Source
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instrumentation, diagnostics, pick-up, closed-orbit |
69 |
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- V. Schlott, M. Dach, M. Dehler, R. Kramert, P. Pollet, T. Schilcher
PSI, Paul Scherrer Institut, Villigen, Switzerland
- M. Ferianis, R. DeMonte
ELETTRA, Sincrotrone Trieste, Trieste, Italy
- A. Košiček, R. Uršič
I-Tech, Instrumentation Technologies, Solkan, Slovenia
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The accelerator complex of the Swiss Light Source (SLS) is presently
under commissioning at the Paul Scherrer Institute (PSI) in Villigen,
Switzerland. The newly developed digital beam position monitor (DBPM)
system has been successfully used to determine beam positions in the
pre-injector LINAC, the transfer lines, the booster synchrotron and the
storage ring. Instant and free selection of operation modes through the
EPICS-based SLS control system allows to choose between single turn,
turn-by-turn and closed orbit measurements. The operational experience
and performance of the DBPM system is presented, based on measurements,
taken during SLS commissioning. A monitoring system (POMS), which
measures the horizontal and vertical mechanical positions of each BPM
block in reference to the adjacent quadrupole magnets has been installed
and first results, indicating transverse movements of the BPM blocks as
a function of current in the storage ring will be presented.
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| PS05 |
Measurement of the Time-Structure of the 72 MeV Proton Beam in the PSI Injector-2 Cyclotron
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instrumentation, diagnostics, emittance |
111 |
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- R. Dölling
PSI, Paul Scherrer Institut, Villigen, Switzerland
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The time-structure monitor at the last turn of the 72MeV Injector-2
cyclotron has been improved in order to meet the stringent
time-resolution requirement imposed by the short bunch length. Protons
scattered by a thin carbon-fibre target pass through a first
scintillator-photomultiplier detector and are stopped in a second one.
The longitudinal bunch shape is given by the distribution of arrival
times measured with respect to the 50 MHz reference signal from the
acceleration cavities. From a coincidence measurement, the time
resolution of the detectors has been determined to be 51 ps and 31 ps
fwhm. Longitudinal and horizontal bunch shapes have been measured at beam
currents from 25μA to 1700μA. Approximately circular bunches were
observed with diameter increasing with current. The shortest observed
proton bunch length was 38 ps fwhm.
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| PS13 |
A Zone Plate Based Beam Monitor for the Swiss Light Source
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instrumentation, diagnostics, emittance |
133 |
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- C. David
PSI-LMN, Laboratory for Micro- and Nanotechnology, Paul Scherrer Institute, Villigen, Switzerland
- V. Schlott, A. Jaggi
PSI-SLS, Swiss Light Source, Paul Scherrer Institute, Villigen, Switzerland
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At the Swiss Light Source, a source imaging set-up is planned on a
dedicated dipole magnet beam-line. A transmission Fresnel Zone Plate will
be used to generate a demagnified image of the source at a photon energy
in the 1.8 keV range. The image will be acquired by scanning a pinhole in
the image plane. A diffraction limited spatial resolution of
approximately 2 microns can be anticipated. The concept has the advantage
of having no components operated in reflection, and no components inside
the frontend.
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