High-Performance Cryogen-Free Platform for Microkelvin-Range Refrigeration

被引：4

作者：

Nyeki, J. ^{[1
]}

Lucas, M. ^{[1
]}

Knappova, P. ^{[1
]}

Levitin, L., V ^{[1
]}

Casey, A. ^{[1
]}

Saunders, J. ^{[1
]}

van der Vliet, H. ^{[2
]}

Matthews, A. J. ^{[2
]}

机构：

[1] Royal Holloway Univ London, Dept Phys, Egham TW20 0EX, Surrey, England

[2] Oxford Instruments NanoSci, Abingdon OX13 5QX, Oxon, England

来源：

PHYSICAL REVIEW APPLIED | 2022年 / 18卷 / 04期

关键词：

NUCLEAR DEMAGNETIZATION; THERMAL-CONDUCTIVITY; SUPERCONDUCTIVITY; THERMOMETRY; PRNI5; STATE; HE-3;

D O I：

10.1103/PhysRevApplied.18.L041002

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Improved accessibility to the microkelvin temperature regime is important for future research in quan-tum materials, for quantum information science, and for applications of quantum sensors. Here, we report the design and performance of a microkelvin platform based on a nuclear-demagnetization stage, engineered and well optimized for operation on a standard cryogen-free dilution refrigerator. PrNi5 is used as the dominant refrigerant. The platform provides a large area for mounting experiments in an ultralow-temperature low-electromagnetic-noise environment. The performance is characterized using current-sensing noise thermometry. Temperatures as low as 395 mu K are reached and a protocol is estab-lished in which it is possible to operate experiments below 1 mK for 95% of the time, providing an efficient cryogen-free microkelvin environment for a wide range of science applications.

引用

页数：6

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