Superconducting magnet system with refrigerator
US7318318B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 11, 2005 |
| Grant date | Jan 15, 2008 |
| Priority date | — |
| Expiry date | Mar 31, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F6/04
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A cryostat (1) with a first helium tank (4) which contains helium at an operating temperature T1<3K, and a second helium tank (2) which is connected to the first helium tank (4) and contains liquid helium at an operating temperature T2>3K, wherein a cooling means (6) is provided in the first helium tank (4) which generates an operating temperature T1<3K in the first helium tank (4), wherein the cooling means (6) is designed as a Joule-Thomson valve with downstream heat exchanger from which pumped helium is transported to a room temperature region outside of the cryostat (1) is characterized in that a refrigerator (11) is provided whose cold end (19) projects into the second helium tank (2) and the supplied helium is returned during normal operation in a closed loop along the refrigerator (11) and into the second helium tank (2), thereby being pre-cooled and liquefied at the cold end (19) of the refrigerator (11). The inventive cryostat minimizes helium consumption, thereby permitting continuous measuring operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.