The Bayreuth Nuclear Demagnetization Refrigerator
The Bayreuth Nuclear Demagnetization Refrigerator
复制标题
拜罗伊特核消磁冰箱
DOI：
10.7567/jjaps.26s3.1715
复制
发表时间：
1988
影响因子：
1.5
通讯作者：
A. Singsaas
中科院分区：
文献类型：
--
作者：
P. Smeibidl;K. Gloos;C. Kennedy;R. Mueller;F. Pobell;P. Sękowski;A. Singsaas
在这封信中，我们报道了拜罗伊特大学新的核冰箱的建造和运行情况。它包含两个铜级，在8特斯拉和9特斯拉分别为103.5摩尔和2摩尔。退磁后，第一阶段使无磁场实验区的铂-核磁共振温度计冷却到15µK，该阶段的大热容使我们能够将低温保持50h而没有任何升温的迹象。在非理想条件下的初步测试中，第二阶段已将另一个高场区的铂-核磁共振温度计冷却到12微K。
In this letter we report on the construction and operation of the new nuclear refrigerator at the University of Bayreuth. It contains two Cu stages of 103.5 moles in 8 Tesla and 2 moles in 9 Tesla, respectively. After demagnetization the first stage has cooled a Pt-NMR thermometer in the field free experimental region to 15 µK. The large heat capacity of the stage has enabled us to hold this low temperature for 50 h without any sign of warming. In a preliminary test under nonideal conditions the second stage has cooled another Pt-NMR thermometer in the high field region to 12 µK.