| Paper |
Title |
Page |
| CT01 |
Measurements with a versatile Test Bench for Commissioning of the new GSI High Current Linac
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45 |
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- P. Forck, P. Strehl
GSI, Gesellschaft für Schwerionenforschung, Darmstadt, Germany
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For the commissioning of the new GSI prestripper a conventional
slitdetector system and a single shot pepperpot system has been
installed on a mobile test bench to measure intensity distributions in
the two transverse phase spaces. To determine intensity distributions
in the longitudinal phase space, including beam energy capacitive
pickups and newly developed diamond counters have been installed on the
test bench. The setup of the test bench provides also redundant
information for beam current, beam profile and beam position. The most
important features of all measuring systems including signal processing
and data evaluation are reported. First results from the commissioning
of the upgraded prestripper of the UNILAC at GSI are reported.
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| PS05 |
Recent Improvements of a Cryogenic Current Comparator for nA Ion Beams with High Intensity Dynamics
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109 |
| |
- A. Peters, H. Reeg, P. Forck
GSI, Gesellschaft für Schwerionenforschung, Darmstadt, Germany
- W. Vodel, R. Neubert
FSU Jena, Institut für Festkörperphysik, Friedrich Schiller Universität, Jena, Germany
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Former measurements of extracted ion beams from the
GSI heavy ion synchrotron SIS showed large current fluctuations
in the microsecond region with a high peak-to-average
ratio. To adapt our Cryogenic Current Comparator
(CCC) to this time structure the detector’s electronics have
been carefully modified.
The most important improvement of the new DC
SQUID system affects the enlargement of the bandwidth
and the slew rate of the measuring system. In addition the
existing data acquisition system for e.g. SEMs (Secondary
Emission Monitors) was extended to digitize the CCC signals
simultaneously. Measurements of Argon beams will
be shown to demonstrate the improved capabilities of the
upgraded Cryogenic Current Comparator.
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| PT07 |
Emittance measurements at the new UNILAC-pre-stripper using a pepper-pot with a PC-controlled CCD-camera
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171 |
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- M. Dolinska, M. Domke, P. Forck, T. Hoffmann, D. Liakin, A. Peters, P. Strehl
GSI, Gesellschaft für Schwerionenforschung, Darmstadt, Germany
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The complex mathematical algorithms and procedures
to extract emittance data from intensity distributions
measured with a single shot pepper-pot device are
described. First results of mathematical evaluation from
the commissioning of the new GSI pre-stripper linac
structures are presented.
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| PT12 |
Aspects of bunch shape measurements for low, intense ions beams
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186 |
| |
- P. Forck, F. Heymach, U. Meyer, P. Moritz, P. Strehl
GSI, Gesellschaft für Schwerionenforschung, Darmstadt, Germany
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For the characterisation of the ion beam delivered by
the new High Current LINAC at GSI, the time structure
of bunches and the knowledge concerning their intensity
distribution in longitudinal phase space is of great
importance. At least 100ps time resolution and the
capability of measuring long tails in the distribution were
design parameters. Taking advantage of Rutherford-scattering
to reduce the count rate, a direct time of flight
measurement technique using diamond detectors can be
applied. First results are reported. Plans for determine the
energy of individual ions by detecting secondary
electrons emitted from a thin C foil using 1m drift are
discussed.
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