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System and method for heater control for evaporation of cryogenic fluids for cooling scientific instruments

  • US 5,973,299 A
  • Filed: 09/11/1997
  • Issued: 10/26/1999
  • Est. Priority Date: 11/01/1996
  • Status: Expired due to Term
First Claim
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1. A cooling system, comprising:

  • a dewar containing a cryogenic liquid;

    a microprocessor, comprising a watts-desired register in a value representing a desired heater power delivery is stored;

    one or more low-capacity heaters conforming to a loading standard, coupled to said microprocessor through one or more heater control elements, said low-capacity heaters disposed in said cryogenic liquid;

    one or more high-capacity heaters coupled to said microprocessor through one or more additional heater control elements, said high-capacity heaters disposed in said cryogenic liquid; and

    a heater control process controlling said heater control elements to activate said one or more low-capacity heaters and said one or more high capacity heaters according to said value stored in said watts desired register.

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