Rainer Renfordt IKF Frankfurt TPC meeting 10/11December GSI Low Voltage System for the Alice TPC " Test of Wiener PL500 supply " Alternative scenario:

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Presentation transcript:

Rainer Renfordt IKF Frankfurt TPC meeting 10/11December GSI Low Voltage System for the Alice TPC " Test of Wiener PL500 supply " Alternative scenario: DC-DC converters

Rainer Renfordt IKF Frankfurt TPC meeting 10/11December GSI Test of Wiener PL500 Supply Test setup: Resistor network on loan from CAEN CANbus software by GSI summer student

Rainer Renfordt IKF Frankfurt TPC meeting 10/11December GSI Test of Wiener PL500 Supply Testresult noise:

Rainer Renfordt IKF Frankfurt TPC meeting 10/11December GSI Test of Wiener PL500 Supply Testresult load variation:

Rainer Renfordt IKF Frankfurt TPC meeting 10/11December GSI Test of Wiener PL500 Supply Preliminary conclusions: behaves as expected: regulation and „differential“ noise „common mode“ noise needs further study Next steps: connect to test setup with CERES preamps ship to CERN for further tests General: due to reduction of power consumption according to the latest estimates: price for LV system will be considerably reduced

Rainer Renfordt IKF Frankfurt TPC meeting 10/11December GSI Konfiguration existing at GSI now: Test of Wiener PL500 Supply CAN bus interface common services 4 modules with up to 7 V and 115 A each, always 2 in parallel

Rainer Renfordt IKF Frankfurt TPC meeting 10/11December GSI DC-DC Converters First test results by CAEN are available: -> slides by 7th Conf. on Advanced Technology and Particle Physics Como, Oct 2001 Giuseppe Vitale

Rainer Renfordt IKF Frankfurt TPC meeting 10/11December GSI Results (III) = B field // to toroid plane = High power (I load: up to 36 A) = B up to 10 kG = Efficiency loss due to B : 11% DC-DC Converters

Rainer Renfordt IKF Frankfurt TPC meeting 10/11December GSI DC-DC Converters DC-DC Converter control philosophy

Rainer Renfordt IKF Frankfurt TPC meeting 10/11December GSI " A 4V 36A DC-DC Converter has been developed for LHC applications " First prototype successfully passed all radiation and magnetic field tolerance tests

Rainer Renfordt IKF Frankfurt TPC meeting 10/11December GSI Possible scenario based on presently available information: modules for 4 V and 36 A with a size of 10 x 10 x 10 cm3 one would need (2 + 4)/Sektor*36 = 216 converters -> conceivable mounting on endplate, cooling needs study open questions: electromagnetic noise? price? packaging? More tests are planned for next year (G. Stefanini) -> for the moment the Wiener supplies are still the baseline solution DC-DC Converters