SUPERCONDUCTIVE MAGNET APPARATUS

• Main Authors: NEMOTO TAKEO, CHIBA TOMOO
• Format: Patent
• Language: English
• Published: 02.08.2007
• Subjects: BASIC ELECTRIC ELEMENTS; DIAGNOSIS; ELECTRICITY; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; INDUCTANCES; MAGNETS; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; MEDICAL OR VETERINARY SCIENCE; PHYSICS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; SURGERY; TESTING; TRANSFORMERS

PROBLEM TO BE SOLVED: To reduce a consumption amount of liquid helium and cool an object to be cooled for long time even if a freezer stops in a structure where the freezer can easily be attached and detached in a superconductive magnet system. SOLUTION: The superconductive magnet apparatus 50 is provided with the multiple step freezer having a low temperature container 1 storing a superconductive coil 3 and helium 2, a thermal shield 12, a vacuum container 14, a freezer port 40, and a first stage 5 and a second stage 6 which are attachably/detachably installed in the freezer port 40 and which are cooling parts. A first heat transmission member 10 of a high heat conductor constituting a part of the freezer port 40 is thermally connected to the thermal shield 12. A second heat transmission member 9 of the high heat conductor installed by thermally connecting it to the first stage 5 is thermally connected to the first heat transmission member 10 so as to attachably/detachably bond them. Helium gas 2b evaporated when the freezer 4 stops is made to pass through the freezer port 40, is thermally exchanged with the first heat transmission member 10 or the second heat transmission member 9 and is discharged outside the vacuum container 14. COPYRIGHT: (C)2007,JPO&INPIT