Cryocoolers

Cryogenic uses various cryocoolers with cooling powers to suit different cryogen free magnet systems and applications. The Gifford-McMahon cycle cryocooler has the advantage of greater thermodynamic efficiency. The pulse-tube cryocooler is vibrationally quieter, has a longer service interval and cools faster from room temperature.

• GM cryocoolers are usually less expensive that a PT cryocooler with equivalent cooling power
• PT cryocoolers must operate almost vertical with the 2nd stage below the motor. GM cryocoolers can operate in any orientation.
• PT cryocoolers are generally a better choice where vibration sensitive measurements are required.
• PT cryocooler maintenance intervals are longer than GM cryocoolers but on site maintenance may be more difficult.