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| PM29 |
A Modular VME Data Acquisition System for Counter Applications at the GSI Synchrotron
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164 |
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- D.A. Liakin
ITEP, Institute for Theoretical and Experimental Physics, Moscow, Russia
- T. Hoffmann, P. Forck
GSI, Gesellschaft für Schwerionenforschung, Darmstadt, Germany
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Particle counters perform the control of beam loss and
slowly extracted currents at the heavy ion synchrotron
(SIS) at GSI. A new VME/Lynx - PC/Linux based data
acquisition system has been developed to combine the
operating purposes beam loss measurement, spill analysis,
spill structure measurement and matrix switching
functionality in one single assembly. In this paper a
detailed PC-side software description is presented. To
achieve best system stability, the software has been
divided into time critical networking and data deploying
threads and low or normal priority interface tasks. Some
new abilities in the fields of data computation and
presentation are reported. A hardware description is
presented, in detail a programmable GSI-EVENT controller,
which is based on an ordinary 8 bit RISC microprocessor and
which has been integrated into the system, to synchronize
the data acquisition with the sophisticated “virtual
accelerator” timing at GSI. First experiences gained while
the commissioning of the system are discussed.
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