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Other Keywords |
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| PS08 |
Current Transformers for GSI's KeV/u to GeV/u Ion Beams - An Overview
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instrumentation, diagnostics, linac, isotope-production |
120 |
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- H. Reeg, N. Schneider
GSI, Gesellschaft für Schwerionenforschung, Darmstadt, Germany
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At GSI's accelerator facilities ion beam intensities usually are observed
and measured with various types of current transformers (CT), matched to
the special requirements at their location in the machines.
In the universal linear accelerator (UNILAC), and the high charge state
injector (HLI) as well, active transformers with 2nd-order feedback are
used, while passive pulse CTs and two DC-CTs based on the magnetic
modulator principle are implemented in the heavy ion synchrotron (SIS)
and the experimental storage ring (ESR). In the high energy beam transfer
lines (HEBT) the particle bunch extraction/reinjection is monitored with
resonant charge-integrating types.
Since more than 10 years number and significance of beam current
transformers for operating GSI's accelerators have grown constantly. Due
to increased beam intensities following the last UNILAC upgrade,
transmission monitoring and beam loss supervision with CTs have become
the main tools for machine protection and radiation security purposes.
All CTs have been constructed and developed at GSI, since no commercial
products were available, when solutions were needed.
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| PS09 |
Transverse Beam Profile Measurements Using Optical Methods
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instrumentation, diagnostics, linac, emittance |
123 |
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- A. Peters, P. Forck, A. Weiss, A. Bank
GSI, Gesellschaft für Schwerionenforschung, Darmstadt, Germany
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Two different systems are currently under development at GSI's heavy ion
facility to measure transverse beam profiles using optical emitters. At
the GSI-LINAC for energies up to 15 MeV/u residual gas fluorescence is
investigated for pulsed high current beams. The fluorescence of N2 is
monitored by an image intensified CCD camera. For all ion species with
energies above 50 MeV/u slowly extracted from the synchrotron SIS a
classical viewing screen system is used. Three different target materials
have been investigated and their behavior concerning efficiency,
saturation and timing performance is evaluated. Both systems (will) use
CCD cameras with a digital read out using the IEEE 1394 standard.
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| PS10 |
Control and Data Analysis for Emittance Measuring Devices
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instrumentation, diagnostics, controls, emittance |
126 |
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- T. Hoffmann
GSI, Gesellschaft für Schwerionenforschung, Darmstadt, Germany
- D.A. Liakin* (work done at GSI)
ITEP, Institute for Theoretical and Experimental Physics, Moscow, Russia
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Due to the wide range of heavy ion beam intensities and energies in the
GSI linac and the associated transfer channel to the synchrotron, several
different types of emittance measurement systems have been established.
Many common devices such as slit/grid or dipole-sweep systems are
integrated into the GSI control system. Other systems like the single
shot pepper pot method using CCD-cameras or stand-alone slit/grid set-ups
are connected to personal computers. An overview is given about the
various systems and their software integration. Main interest is directed
on the software development for emittance front-end control and data
analysis such as evaluation algorithms or graphical presentation of the
results. In addition, special features for improved usability of the
software such as data export, project databases and automatic report
generation will be presented. An outlook on a unified evaluation
procedure for all different types of emittance measurement is given.
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| PS11 |
Test of Different Beam Loss Detectors at the GSI Heavy Ion Synchrotron
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instrumentation, diagnostics, beam-losses, synchrotron |
129 |
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- P. Forck, T. Hoffmann
GSI, Gesellschaft für Schwerionenforschung, Darmstadt, Germany
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For the sensitive process of slow extraction from a synchrotron
a reliable control of the beam losses is needed.
We have tested several types of particle detectors mounted
at the extraction path of the SIS: A BF-tube for pure neutron
detection, a liquid and a plastic scintillator detecting
neutrons, gammas and charged particles and an Argon filled
ionization chamber mainly sensitive to charged particles.
While the count rate is quite different, the time evolution of
all detector signals during the spill are similar, but the plastic
scintillator has the highest dynamic range. This type is
going to be used for beam alignment.
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