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Description
One of the major components parts of the Facility for Antiproton and Ion Research (FAIR) international accelerator facility currently being built at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, Germany, will be the Heavy-Ion-Synchrotron SIS100. This machine will consist of 6 sectors housing few hundreds of superconducting magnets made of Nuclotron type cable, which is cooled by two-phase helium at a temperature of 4.5K. Each two sectors will be supplied with cooling and electrical current from a Feed Box via By-Pass Lines, which connect to the magnets.
More than 30 precise and reliable mass flow measurement devices are required for the SIS100 Local Cryogenic to function properly throughout the system. Flowmeters with such properties available on the market are based on the Coriolis principle, that apart from their high cost. They are characterized by, among others: high flow pressure drop, large geometry or large measurement range, what limits their use in some locations of the system. Therefore, to meet the SIS100 Local Cryogenic System design requirements, based on the design guidelines and calculation models included in the ASME MFC-14M-2003 standard, Wroclaw University of Science and Technology (WUST) in Poland has developed 3 orifice-type flowmeters. Their design is adapted to the expected ranges of helium mass flows as well as to the measurement ranges of differential pressure transmitters, which will be used to determine the flow rates. One of the of the flowmeter design types has been produced by Kriosystem Ltd, Poland. In order to confirm the correctness of both, the design and computational models for the developed flowmeters in pressurized, cold pressurized and subcooled liquid helium conditions, GSI conducted tests of the flowmeter on a dedicated test stand. The paper presents details of the design of the developed and tested orifice-type flowmeter, describes the test stand and the measurement procedure, as well as presents and discusses the measurement results and their comparison with the computational model.
| Submitters Country | Poland |
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