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| PM15 |
First Experimental Results And Improvements On Profile Measurements With The Vibrating Wire Scanner
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tail, wire scanner, diagnostics, instrumentation |
128 |
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- S.G. Arutunian, K.H. Bakshetyan, N.M. Dobrovolski, M.R. Mailian, H.E. Soghoyan, I.E. Vasiniuk
YPI, Yerevan Physics Institute, Armenia
- K. Wittenburg
DESY, Deutsches Elektronen-Synchrotron, Hamburg, Germany
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The paper presents the first experimental results of transverse profile
scans using a wire scanner based on a vibrating wire (vibrating wire
scanner - VWS). The measurements were performed at the injector electron
beam (6 nA) of the Yerevan synchrotron. The beam profile information is
obtained by measuring the wire natural oscillations that depend on the
wire temperature. This first experiments on weak electron beam proved
this new method as a very sensitive tool, even suitable for tail
measurements.
Additional, improvements were tested to overcome some problems connected
with signal conditioning and signal transfer in the presence of
electromagnetic noise. As a result the noises were neatly separated and
reduced. A mathematical method for rejection of distorted data was
developed. Experiments with the scanner at the PETRA accelerator at DESY
are planned for measurements of beam tails.
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| PM25 |
Diagnostics of the PROSCAN beam lines
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beam profile, proton beam, ionisation chamber, PROSCAN |
152 |
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- R. Dölling
PSI, Paul Scherrer Institut, Villigen, Switzerland
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PROSCAN, an extended medical facility using proton beams for the
treatment of deep seated tumours and eye melanoma, is now in preparation
at PSI. A 250 MeV proton beam of 0.1 to 500 nA will be extracted from the
COMET cyclotron. After degradation to 70 to 230 MeV it can be delivered
(at a maximum current of 1 to 5 nA) into one of four areas: Two gantries,
an eye treatment room and an irradiation area for various experiments.
Fast changes of beam energy are foreseen for the spot-scanning treatment
of deep-seated tumours in the gantries. Several diagnostics will be used
to control the beam parameters in different modes of operation. An
overview is given on the devices foreseen for the measurement of beam
profile, position, current and losses in the beam lines.
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