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A New Cryocooler Design Using a New Highly Effective Generative Material

IP.com Disclosure Number: IPCOM000028010D
Publication Date: 2004-Apr-19
Document File: 1 page(s) / 351K

Publishing Venue

The IP.com Prior Art Database

Abstract

A new erbium based regenerative material is used to design a regenerator, which replaces lead in a single stage or a two-stage cryocooler.

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A New Cryocooler Design Using a New Highly Effective Regenerative Material

    A new erbium based regenerative material is used to design a regenerator, which replaces lead in a single stage cryocooler. This material has a higher specific heat than lead in the temperature range of 20 to 50 K. Traditional cryocoolers are designed with phosphor bronze screens as the regenerative materials. The specific heat of the phosphor bronze will be very low when the temperature in the regenerator is below 50 K. More recent cryocoolers are designed with a hybrid regenerator with phosphor bronze screens at warm end and lead spheres at cold end.

     In this design we utilize a hybrid regenerator with phosphor bronze screens at warm end and spheres of erbium based material at cold end. Because of the high specific heat of this material compared to lead, the performance of crycooler will be more efficient in the temperature range of 20 to 50 K. The bottom temperature of this new cryocooler is also lower than the case of lead.

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