Performance improvement of a two-stage GM cryocooler by use of Er(Ni0.075Co0.925)2 magnetic regenerator material

DOI

Description

Abstract A newly developed magnetic regenerator material Er(Ni 0.075 Co 0.925 ) 2 , having high specific heat at temperatures from 10 to 20 K, has been tested inside the second regenerator of a two-stage GM cryocooler. Different working conditions have been examined: four Er(Ni 0.075 Co 0.925 ) 2 /Pb material ratios, three displacer reciprocating speeds, and two cryocooler stroke lengths. In the best working conditions, the experimental results show a cooling power improvement up to 15% over the whole temperature range from 10 to 20 K compared to that of the same GM cryocooler employing only lead.

Journal

  • Cryogenics

    Cryogenics 42 653-657, 2002-10-01

    Elsevier BV

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