# US 12,112,887 B2 · Switch assemblies of superconducting magnet assemblies and reconfigurable superconducting magnet assemblies of a cryogenic system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,112,887 B2 - Document ID: US12112887B2 - Status: Granted - Kind: B2 - Application number: 17/969,026 - Filed: 2022-10-19 - Published: 2024-04-25 - Granted: 2024-10-08 - Earliest claimed: 2022-10-19 - Assignees: Ge Precision Heatlhcare LLC - Applicants: Ge Precision Healthcare LLC - Inventors: Dogan Celik; Charles D. Yarborough; Stuart Paul Feltham - Web page: https://patentgrep.com/patent/US12112887B2 ## CPC - G01R 33/3804: {Additional hardware for cooling or heating of the magnet assembly, for housing a cooled or heated part of the magnet assembly or for temperature control of the magnet assembly} - H01F 6/04: Cooling - G01R 33/3802: {Manufacture or installation of magnet assemblies; Additional hardware for transportation or installation of the magnet assembly or for providing mechanical support to components of the magnet assembly} - G01R 33/3815: with superconducting coils, e.g. power supply therefor - H01F 6/06: Coils, e.g. winding, insulating, terminating or casing arrangements therefor - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract A superconducting magnet assembly is provided. The magnet assembly includes a magnet configured to generate a polarizing magnetic field, a thermosyphon tube, a main tank, and a metering tank. The thermosyphon tube is in thermal contact with the magnet, the thermosyphon tube configured to carry cryogen therethrough and cool the magnet via the cryogen. The metering tank contains the cryogen and is coupled with the main tank, and the main tank has an interior volume greater than an interior volume of the metering tank, The thermosyphon tube is coupled with the main tank at a first end of the thermosyphon tube and coupled with the metering tank at a second end of the thermosyphon tube, the second end opposite the first end, and the thermosyphon tube and the metering tank define a path along which the cryogen flows. ## Claims ### Claim 1 A superconducting magnet assembly, comprising: a magnet configured to generate a polarizing magnetic field; a thermosyphon tube in thermal contact with the magnet by being in direct contact with the magnet or via material of a relatively high thermal conductivity being in direct contact with the magnet, the thermosyphon tube configured to carry cryogen therethrough and cool the magnet via the cryogen; a main tank; and a metering tank containing the cryogen and coupled with the main tank, the main tank having an interior volume greater than an interior volume of the metering tank, wherein the thermosyphon tube is coupled with the main tank at a first end of the thermosyphon tube and coupled with the metering tank at a second end of the thermosyphon tube, the second end opposite the first end, and the thermosyphon tube and the metering tank define a path along which the cryogen flows. ### Claim 2 (depends on 1) The superconducting magnet assembly of claim 1, wherein the metering tank includes a meter configured to measure a volume of the cryogen in the metering tank. ### Claim 3 (depends on 1) The superconducting magnet assembly of claim 1, further comprising: a first pressure valve positioned on the thermosyphon tube adjacent the first end and a second pressure valve positioned on the thermosyphon tube adjacent the second end. ### Claim 4 (depends on 3) The superconducting magnet assembly of claim 3, wherein the first pressure valve is configured to operate in a cryogenic environment and with presence of the polarizing magnetic field. ### Claim 5 (depends on 3) The superconducting magnet assembly of claim 3, wherein the first pressure valve is configured to control flow of the cryogen in the thermosyphon tube. ### Claim 6 (depends on 3) The superconducting magnet assembly of claim 3, wherein the first pressure valve comprising: a valve head defining a gas chamber; and a plunger moveable between a first position and a second position farther away from the valve head than the first position via a pressure change in the gas chamber. ### Claim 7 (depends on 1) The superconducting magnet assembly of claim 1, further comprising an gas charge line in communication with the main tank. ### Claim 8 (depends on 7) The superconducting magnet assembly of claim 7, further comprising a cold head coupled with the main tank and a thermal link coupling the gas charge line with the cold head. ### Claim 9 (depends on 1) The superconducting magnet assembly of claim 1, wherein the superconducting magnet assembly does not include a vent line. ### Claim 10 (depends on 1) The superconducting magnet assembly of claim 1, wherein the superconducting magnet assembly further comprises a tank vent line coupled with the main tank. ### Claim 11 (depends on 10) The superconducting magnet assembly of claim 10, wherein the superconducting magnet assembly further comprises a tube vent line coupled with the thermosyphon tube and the tank vent line. ### Claim 12 (depends on 1) The superconducting magnet assembly of claim 1, wherein the superconducting magnet assembly is reconfigurable between an open system and a sealed system. ### Claim 13 (depends on 1) The superconducting magnet assembly of claim 1, wherein the superconducting magnet assembly is configured as an open system. ### Claim 14 (depends on 1) The superconducting magnet assembly of claim 1, wherein the superconducting magnet assembly is configured as a sealed system. ### Claim 15 A method of assembling a magnet assembly, comprising: providing a magnet assembly, the magnet assembly including: a magnet configured to generate a polarizing magnetic field; a thermosyphon tube configured to carry cryogen; a main tank; and a metering tank, wherein the main tank has an interior volume greater than an interior volume of the metering tank; coupling the thermosyphon tube with the magnet such that the thermosyphon tube is in thermal contact with the magnet by being in direct contact with the magnet or via material of a relatively high thermal conductivity being in direct contact with the magnet; and defining a path along which the cryogen flows by: coupling the main tank with the metering tank; and coupling a first end of the thermosyphon tube with the main tank and a second end of the thermosyphon tube with the metering tank, the second end opposite the first end. ### Claim 16 (depends on 15) The method of claim 15, further comprising: configuring the magnet assembly as an open system by: filling the main tank with the cryogen; and installing a tank vent line with the main tank. ### Claim 17 (depends on 15) The method of claim 15, further comprising: configuring the magnet assembly as a sealed system by not including the main tank with the cryogen. ### Claim 18 (depends on 15) The method of claim 15, wherein providing a magnet assembly further comprises: coupling a gas charge line with the main tank; and coupling a thermal link between the gas charge line and the main tank. ### Claim 19 (depends on 15) The method of claim 15, wherein defining a path further comprises: installing a first pressure valve on the thermosyphon tube adjacent the first end of the thermosyphon tube; and installing a second pressure valve on the thermosyphon tube adjacent the second end of the thermosyphon tube. ### Claim 20 (depends on 19) The method of claim 19, wherein the first pressure valve is configured to operate in a cryogenic environment and with presence of the polarizing magnetic field, and is configured to control flow of the cryogen in the thermosyphon tube via a pressure change in the first pressure valve.