Journalartikel

Jahr der Veröffentlichung: 1999

Seiten: 783-789

Zeitschrift: Cryogenics

Bandnummer: 39

Heftnummer: 9

ISSN: 0011-2275

Verlag: Elsevier

Abstract: 
A study on the experimental performance of a hybrid cooler is presented. The two-stage unit consists of a commercial single-stage GM refrigerator to precool a pulse tube stage capable of reaching a minimum temperature of 2.2 K. The pressure waves for both stages are generated separately by independent rotary valves using the same 6 kW helium compressor. This allows one to run each stage at its optimum frequency. The GM refrigerator operates at a fixed frequency of 2 Hz while the optimum frequency for the pulse tube stage was experimentally found to be lower. Experiments were carried out with and without a regenerative tube. Neodymium was used as regenerator material in the coldest section. A cooling power of 0.26 W at 4.2 K was achieved at the pulse tube stage with an additional heat load of 50 W at the GM stage at 56 K. (C) 1999 Elsevier Science Ltd. All rights reserved.

Harvard-Zitierstil: von Schneidemesser, A., Thummes, G. and Heiden, C. (1999) Performance of a single-stage 4 K pulse tube cooler with neodymium regenerator precooled with a single-stage GM refrigerator, Cryogenics, 39(9), pp. 783-789

APA-Zitierstil: von Schneidemesser, A., Thummes, G., & Heiden, C. (1999). Performance of a single-stage 4 K pulse tube cooler with neodymium regenerator precooled with a single-stage GM refrigerator. Cryogenics. 39(9), 783-789.