Ultracryostat and frigidity supplying apparatus

Abstract

A ultracryostat is provided with a frigidity supplying member to supply frigidity to the ultracryostat which uses cryogen such as liquid helium, wherein the frigidity supplying member comprises a heat pipe and one end of the heat pipe is connected to a frigidity generating member of a cryocooler and the other end of the heat pipe is connected to a thermal anchor of a cryostat.

1 . An ultracryostat with a frigidity supplying member to supply frigidity to the ultracryostat which uses cryogen, 
 wherein one end of a heat pipe is connected to a frigidity generating member of a cryocooler and the other end of the heat pipe is connected to a thermal anchor of a cryostat.    
   
   
       2 . The ultracryostat as claimed in  claim 1 , wherein the heat pipe is made of stainless steel.  
   
   
       3 . The ultracryostat as claimed in  claim 1 , further comprising a member to take in and out gas in the heat pipe from and to outside of the cryostat, wherein the member comprises a tube to take in and out gas from a part of the heat pipe.  
   
   
       4 . The ultracryostat as claimed in  claim 3 , wherein the narrow tube is made of stainless steel.  
   
   
       5 . The ultracryostat as claimed in  claim 3 , wherein the member to take in and out gas in the heat pipe comprises a gas supplying member to supply gas, connected to the narrow tube through a first bulb, and a vacuum pump to discharge gas, connected to the narrow tube through a second bulb.  
   
   
       6 . The ultracryostat as claimed in  claim 5 , wherein the first and second bulbs open or close in conjunction with switching of the cryocooler, when the cryocooler is ON, the first bulb opens to supply gas from the gas supplying member to the heat pipe, the second bulb closes and the vacuum pump is OFF, and when the cryocooler is OFF, the first bulb closes to stop gas supply from the gas supplying member to the heat pipe, the second bulb opens and the vacuum pump is ON to discharge gas in the heat pipe.  
   
   
       7 . A frigidity supplying apparatus comprising: 
 a cryocooler and a heat pipe having controllable thermal conductivity,    wherein the cryocooler comprises a frigidity generating member, one end of the heat pipe is connected to the frigidity generating member, and the cryocooler supplies frigidity from the other end of the heat pipe.    
   
   
       8 . The frigidity supplying apparatus as claimed in  claim 7 , wherein thermal conductivity of the heat pipe is controlled in conjunction with switching of the cryocooler, and the thermal conductivity when the cryocooler is OFF is lower than the thermal conductivity when the cryocooler is ON.  
   
   
       9 . The frigidity supplying apparatus as claimed in  claim 7 , wherein the both ends of the heat pipe are made of copper and a wall of the heat pipe is made of stainless steel.  
   
   
       10 . The frigidity supplying apparatus as claimed in  claim 7 , further comprising a gas regulating member to take in and out gas in the heat pipe.  
   
   
       11 . The frigidity supplying apparatus as claimed in  claim 10 , wherein the gas regulating member comprises a tube to take in and out gas in the heat pipe.  
   
   
       12 . The frigidity supplying apparatus as claimed in  claim 11 , wherein the tube is made of stainless steel.  
   
   
       13 . The frigidity supplying apparatus as claimed in  claim 11 , wherein the gas regulating member further comprises a gas supplying member to supply gas and a vacuum pump to discharge gas, the gas supplying member being connected to the tube through a first bulb, the vacuum pump being connected to the tube through a second bulb.  
   
   
       14 . The frigidity supplying apparatus as claimed in  claim 13 , wherein the first and second bulbs open or close in conjunction with switching of the cryocooler, when the cryocooler is ON, the first bulb opens to supply gas from the gas supplying member to the heat pipe, the second bulb closes and the vacuum pump is OFF, and when the cryocooler is OFF, the first bulb closes to stop gas supply from the gas supplying member to the heat pipe, the second bulb opens and the vacuum pump is ON to discharge gas in the heat pipe.