A newly developed magnetic regenerator material Er(Ni0.075Co0.925)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(Ni0.075Co0.925)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. © 2002 Elsevier Science Ltd. All rights reserved.
Trevisani, L., Kuriyama, T., Negrini, F., Okamura, T., Ohtani, Y., Okamura, M., et al. (2002). Performance improvement of a two-stage GM cryocooler by use of Er(Ni0.075Co0.925)2 magnetic regenerator material. CRYOGENICS, 42(10), 653-657 [10.1016/S0011-2275(02)00101-7].
Performance improvement of a two-stage GM cryocooler by use of Er(Ni0.075Co0.925)2 magnetic regenerator material
Trevisani L.;Fabbri M.
2002
Abstract
A newly developed magnetic regenerator material Er(Ni0.075Co0.925)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(Ni0.075Co0.925)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. © 2002 Elsevier Science Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
