Pulse tube refrigerator based cryogenic cooling circuit for NMR cold probes

被引：0

作者：

Atrey, M. D. ^{[1
]}

Healey, A. ^{[1
]}

Janaway, T. ^{[1
]}

McMahon, A. ^{[1
]}

机构：

[1] Oxford Instruments Supercond, Tubney Woods, Abingdon OX13 5QX, Oxon, England

来源：

ADVANCES IN CRYOGENIC ENGINEERING, VOLS 51A AND B | 2006年 / 823卷

关键词：

Pulse Tube Refrigerator; cold probe; NMR;

D O I：

暂无

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Oxford Instruments Superconductivity has developed a new closed cycle cooling circuit based on a Pulse Tube Refrigerator (PTR) to cool a Cold Probe for NMR applications. By replacing the existing Gifford McMahon (G-M) cryocooler with a PTR, levels of vibration at the probe can be reduced by an order of magnitude, essential for NMR experiments. Another benefit comes from the reduction in moving parts due to fundamental differences between the PTR and G-M coolers. This should lead to improved reliability and reduced down times. This cooling circuit can supply more than 3.5 W of cooling power to cool RF coils in the probe at 25 K and 2.5 W to the electronics. Cooling the RF coils and the electronics in the probe can improve signal to noise ratio by 3 to 4 times, helping scientists gain a greater understanding of the structure of proteins and speeding drug discoveries.

引用

页码：41 / +

页数：2