Methods and apparatus for filling superconductive magnets

Abstract

A method and apparatus for filling superconductive magnets is disclosed by using gaseous helium to control the flow of liquefied helium from a container to a magnet. By measuring the pressure of the gaseous helium in the container of liquefied helium, it can be determined when to stop the flow of liquefied helium. This can reduce quenches and helium losses which can occur during the transfer of liquid helium from the dewar to the superconductive magnet.

1 - 27 . (canceled) 
     
     
         28 . An apparatus comprising a container of gaseous helium; a container of liquefied helium; fluid connection means connecting the container of gaseous helium with the container of liquefied helium; means for measuring the flow rate of the gaseous helium and means for measuring the pressure of the gaseous helium in the container of liquefied helium. 
     
     
         29 . The apparatus as claimed in  claim 28  wherein said container of gaseous helium is a dewar. 
     
     
         30 . The apparatus as claimed in  claim 28  wherein said container of gaseous helium is a cylinder. 
     
     
         31 . The apparatus as claimed in  claim 28  wherein said means for measuring flow and pressure is by a programmable logic control device. 
     
     
         32 . The apparatus as claimed in  claim 28  wherein said fluid connection means are hoses. 
     
     
         33 . The apparatus as claimed in  claim 28  wherein said liquid helium is fed to a cryostat of a magnet. 
     
     
         34 . The apparatus as claimed in  claim 28  wherein said magnet is a superconductive magnet.