Pub Date : 2018-09-03DOI: 10.4324/9781351116428-20
Geoff Hill
The ESCAR magnet cooling system has been success fully demonstrated. This two-phase helium cooling system includes a CTI-Sulzer gas-bearing turbine refrigerator with two-stage compression by oil- '1 ubri cated screw compressors, 120 m of 5-cm-d i ameter vacuum-insulated transfer line and twelve series connected magnet cryostats with weirs for liquid level control. The refrigeration plant provides up to 1900 W of refrigeration at 4.5 K with a mass flow of 113 g/s. Heat load within the transfer line has been measured at 0.25 W/m in sub-system testing. Cool-down times to 4.5 K for the 12 warm-iron magnets with a cold mass of 2500 kg have been about 12 hours. The magnet cryostats separate liquid by gravitational extraction and fill in sequence at a rate of up to 400 ~/hr. A heater in the transfer line allows adjustment of the inlet coolant quality (ratio of gas to liquid) to the cryostats; flow instabilities were not present and could not be induced. Pressure levels in the cold bore, beam orbit space were below 10-10 torr. result of magnet transitions, have been safely handled both in terms of refrigerator response and cryostat pressure relief. have
{"title":"Magnet","authors":"Geoff Hill","doi":"10.4324/9781351116428-20","DOIUrl":"https://doi.org/10.4324/9781351116428-20","url":null,"abstract":"The ESCAR magnet cooling system has been success fully demonstrated. This two-phase helium cooling system includes a CTI-Sulzer gas-bearing turbine refrigerator with two-stage compression by oil- '1 ubri cated screw compressors, 120 m of 5-cm-d i ameter vacuum-insulated transfer line and twelve series connected magnet cryostats with weirs for liquid level control. The refrigeration plant provides up to 1900 W of refrigeration at 4.5 K with a mass flow of 113 g/s. Heat load within the transfer line has been measured at 0.25 W/m in sub-system testing. Cool-down times to 4.5 K for the 12 warm-iron magnets with a cold mass of 2500 kg have been about 12 hours. The magnet cryostats separate liquid by gravitational extraction and fill in sequence at a rate of up to 400 ~/hr. A heater in the transfer line allows adjustment of the inlet coolant quality (ratio of gas to liquid) to the cryostats; flow instabilities were not present and could not be induced. Pressure levels in the cold bore, beam orbit space were below 10-10 torr. result of magnet transitions, have been safely handled both in terms of refrigerator response and cryostat pressure relief. have","PeriodicalId":308575,"journal":{"name":"Loudspeaker Modelling and Design","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114550561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-09-03DOI: 10.4324/9781351116428-37
Geoff Hill
{"title":"Tetrahedral Test Chamber—White Paper","authors":"Geoff Hill","doi":"10.4324/9781351116428-37","DOIUrl":"https://doi.org/10.4324/9781351116428-37","url":null,"abstract":"","PeriodicalId":308575,"journal":{"name":"Loudspeaker Modelling and Design","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117154355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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