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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, GSI, 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, GSI, 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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| PS21 |
Diagnostics for the Photon Injector Test Facility in Desy Zeuthen
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instrumentation, diagnostics, PITZ, free-electron-laser, emittance |
154 |
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- J. Bähr, I. Bohnet, D. Lipka, H. Lüdecke, F. Stephan, Q. Zhao
DESY-Zeuthen, Deutsches Elektronen-Synchrotron, Zeuthen, Germany
- K. Flöttmann
DESY, Deutsches Elektronen-Synchrotron, Hamburg, Germany
- I. Tsakov
NRNE, Institute for Nuclear Reseach and Nuclear Energy of the Bulgarian Academy of Science, Sofia, Bulgaria
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A Photo Injector Test facility (PITZ) is under construction at
DESY-Zeuthen. The aim is to develop and operate an optimized photo
injector for future free electron lasers and linear accelerators. This
concerns especially minimal transverse emittances and proper
longitudinal phase space. The commissioning of the photo injector will
take place in summer 2001. In the rst phase the energy of the produced
electrons is about 5 MeV. A short description of the setup and beam
parameters are given. Optimization of an electron gun is only possible
based on an extended diagnostics system. The diagnostics system for the
analysis of the transversal and longitudinal phase space will be
described. It consists of a measurement system of the transversal
emittance, a TV-based image measurement system, a streakcamera
measurement facility, a spectrometer using a dipole magnet and further
detectors. Problems of the measurement of the longitudinal phase space
are discussed in detail.
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| PM02 |
Signal Processor for Spring8 Linac BPM
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instrumentation, diagnostics, pick-up, controls, SPring-8 |
162 |
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- K. Yanagida, T. Asak, H. Dewa, H. Hanaki, T. Hori, T. Kobayashi, A. Mizuno, S. Sasaki, S. Suzuki, T. Takashima, T. Taniushi, H. Tomizawa
SRRI, Japan Synchrotron Radiation Research Institute, Mikazuki, Hyogo, Japan
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A signal processor of the single shot BPM system consists of a
narrow-band BPF unit, a detector unit, a P/H circuit, an S/H IC and a
16-bit ADC. The BPF unit extracts a pure 2856MHz RF signal component from
a BPM and makes the pulse width longer than 100ns. The detector unit that
includes a demodulating logarithmic amplifier is used to detect an S-band
RF amplitude. A wide dynamic range of beam current has been achieved;
0.01 ~ 3.5nC for below 100ns input pulse width, or 0.06 ~ 20mA for above
100ns input pulse width. The maximum acquisition rate with a VME system
has been achieved up to 1kHz.
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| PM04 |
Stripline Beam Position Monitors For "ELBE"
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instrumentation, diagnostics, ELBE, pick-up |
168 |
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- P. Evtushenko, A. Büchner, H. Büttig, P. Michel, R. Schurig, B. Wustmann
FZR, Forschungszentrum Rossendorf, Dresden, Germany
- K. Jordan
JLAB, Thomas Jefferson National Accelerator Facility, Newport News, VA, USA
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At the Forschungszentrum Rossendorf (FZR), the
superconducting electron linear accelerator ELBE is under
construction. It will deliver an electron beam with an
energy of up to 40 MeV at an average beam current of up
to 1mA. The accelerator uses standing wave DESY type
RF cavities operating at 1.3 GHz. A non-destructive
system for the measurement of the beam position at about
30 locations is needed. To obtain the required resolution
of 100μm, a system of stripline beam position monitors
(BPM) is under design.
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