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Other Keywords |
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| IT01 |
The Future of Nuclear Physics in Europe and the Demands on Accelerators techniques
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antiproton, diagnostics, synchrotron, superconductivity |
3 |
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- W.F. Henning
GSI, Gesellschaft für Schwerionenforschung, Darmstadt, Germany
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Future large-scale facilities for research are very much under discussion
in Europe. This results, of course, on the one hand from the discussions
in the science communities and their identification of new frontiers in
research; but it also reflects to a certain degree the trend to pool
resources among the countries towards what has been labeled the “European
Research Area”.
In the field of nuclear physics and/or its intersections with particle
physics, several such efforts have been under consideration or are
underway. This applies to the study of the subnuclear degrees of freedom
of the strong interaction system(s) as well as to the extremes of the
atomic nucleus as the many-body system of the strong force.
In this talk an attempt is made to summarize the present status and
future plans, with emphasis on the facility concepts and their demands on
accelerator technology and development
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| PM13 |
The PS Booster Fast Wire Scanner
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emittance, instrumentation |
122 |
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- S. Burger, C. Carli, K. Priestnall, U. Raich
CERN, Geneva, Switzerland
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The very tight emittance budget for LHC type beams makes precise
emittance measurements in the injector complex a necessity. The PS
machine uses 2 fast wire scanners per transverse plane for emittance
measurement of the circulating beams. In order to ease comparison the
same type of wire scanners have been newly installed in the upstream
machine, the PS Booster, where each of the 4 rings is equipped with 2
wire scanners measuring the horizontal and vertical profiles.
Those wire scanners use new and more modern control and readout
electronics featuring dedicated intelligent motor movement controllers,
which relieves the very stringent real time constraints due to the very
high speed of 20 m/s. In order to be able to measure primary beams at the
very low injection energy of the Booster (50 MeV) secondary emission
currents from the wire can be measured as well as secondary particle
flows at higher primary particle energies during and after acceleration.
The solution adopted for the control of the devices is described as well
as preliminary results obtained during measurements made in 2002.
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| PM17 |
Development of a Permanent Magnet Residual Gas Profile Monitor With Fast Readout
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diagnostics, instrumentation, storage-ring, synchrotron |
134 |
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- T. Giacomini, P. Forck
GSI, Gesellschaft für Schwerionenforschung, Darmstadt, Germany
- V. Skachkov, A. Gobulev, D.A. Liakin
ITEP, Institute for Theoretical and Experimental Physics, Moscow, Russia
- A. Vetrov
MSU, Moscow State University, MSU, Moscow, Russia
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Modern ion accelerators and storage rings require very fast beam profile
measurements (turn-by-turn) with highest resolutions. We propose a new
residual gas monitor, which will operate on secondary electrons whose
trajectories are localized within ∅ 0.1 mm filaments along 0.1 T uniform
magnetic field lines excited by a permanent magnet. The best way to adopt
the resolution of 0.1 mm into the data acquisition system is the use of a
CCD camera with upstream MCP-phosphor screen assembly. To realize a fast
turn-by-turn beam profile measurement a photodiode readout by a
100-channel amplifier/digitizer is foreseen.
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| PM27 |
Multifunction Test-Bench For Heavy Ion Sources
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diagnostics, instrumentation, emittance |
158 |
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- S. Barabin, V. Batalin, A. Kozlov, T. Kulevoy, R. Kuybida, D.A. Liakin, A. Orlov, V. Pershin, S. Petrenko, D. Selezniov, Yu. Stasevich
ITEP, Institute for Theoretical and Experimental Physics, Moscow, Russia
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The new test-bench for heavy ion sources has been created in ITEP. It is
planned to equip test-bench with a set of measurement devices to cover
wide range of beam widths, divergences, durations, currents etc. It will
provide measurements of different heavy ion beams parameters,
particularly, emittance and charge state distribution. The last parameter
may be measured both by the time-of-flight method and with the magnet
analyzer. Two emittance measurement devices will be installed. It will be
possible to use both slit/grid and CCD based "pepperpot" methods, which
will give advantages of combination of classical emittance measurements
with performance of the CCD based devices. The detailed description of
test-bench and its equipment is presented. The first results at MEVVA ion
source and beam investigations are discussed.
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| PM28 |
Application of Beam Diagnostics for Intense Heavy Ion Beams at the GSI UNILAC
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linac, space charge, longitudinal-dynamics |
161 |
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- W. Barth, L. Dahl, J. Glatz, L. Groening, S. Richter, S. Yaramishev
GSI, Gesellschaft für Schwerionenforschung, Darmstadt, Germany
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With the new High Current Injector (HSI) of the GSI UNILAC the beam pulse
intensity had been increased by approximately two orders of magnitudes.
The HSI was mounted and commissioned in 1999; since this time the UNILAC
serves as an injector for the synchrotron SIS, especially for high
uranium intensities. Considering the high beam power of up to 1250 kW and
the short stopping range for the UNILAC beam energies (≤12 MeV/u),
accelerator components could be destroyed, even during a single beam
pulse. All diagnostic elements had to be replaced preferably by
non-destructive devices. The beam current is mainly measured by beam
transformers instead of Faraday cups, beam positions are measured with
segmented capacitive pick-ups and secondary beam monitors instead of
profile harps. The 24 installed pick-ups are also used to measure
intensities, widths and phase of the bunches, as well beam energies by
evaluating pick-ups at different positions. The residual gas ionization
monitors allow on-line measurements of beam profiles. The knowledge of
the real phase space distribution at certain position along the linac is
necessary for optimizing the machine tuning, for the improvement of the
matching to the synchrotron and for a better understanding of beam
dynamic issues under space charge conditions. The paper will report the
application of different beam diagnostic devices for the measurement of
transverse beam emittances at different UNILAC beam energies and for
different beam intensities. Additionally, measurements of the bunch
structure after the HSI and a the design of a new device for the
measurement of the longitudinal emittance at the end of the UNILAC will
be included.
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