METHOD AND DEVICE FOR PRECOOLING MASS BODY BEFORE IMMERSING IN ULTRA-LOW TEMPERATURE LIQUID

PROBLEM TO BE SOLVED: To minimize the quantity of helium required to obtain a superconducting action by avoiding the contamination of a superconducting magnet with liquid nitrogen. SOLUTION: The gaseous phase of an ultra-low temperature liquid is cooled through a heat exchanger 28 with an ultra-low...

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Hauptverfasser:	CHALK DAVID JONATHAN, BISCHKE LAWRENCE VINCENT, SCHUCK THOMAS WINTER, O'SHEA SHAUN PATRICK, HUANG XIANRUI, MORTON STANLEY LOUIS
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS BLASTING COLD ROOMS COMBINED HEATING AND REFRIGERATION SYSTEMS COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHERSUBCLASS ELECTRICITY FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED,LIQUEFIED, OR SOLIDIFIED GASES FIXED-CAPACITY GAS-HOLDERS HEAT PUMP SYSTEMS HEATING ICE-BOXES INDUCTANCES LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES MAGNETS MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING REFRIGERATION OR COOLING REFRIGERATORS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES STORING OF DISTRIBUTING GASES OR LIQUIDS TRANSFORMERS VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED ORSOLIDIFIED GASES WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To minimize the quantity of helium required to obtain a superconducting action by avoiding the contamination of a superconducting magnet with liquid nitrogen. SOLUTION: The gaseous phase of an ultra-low temperature liquid is cooled through a heat exchanger 28 with an ultra-low temperature liquid (liquid nitrogen) which has a boiling point higher than that of an ultra-low temperature liquid (liquid helium) into which a mass body (superconducting magnetic body) 12 is emmersed. The cooled gaseous phase is circulated, collected, recooled, and recirculated through a vessel 13 housing the mass body 12, until the mass body 12 and container 13 reach a desired precooled temperature. Thereafter, the ultra-low-temperature liquid (liquid helium) is introduced into the vessel for immersing the mass body 12.