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A compact rotating dilution refrigerator
M J Fear1, P M Walmsley, D A Chorlton
1School of Physics and Astronomy, The University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom.
The Review of Scientific Instruments
|November 5, 2013
Summary
A new rotating dilution refrigerator simplifies experiments on superfluid helium-4 (4He) dynamics. Its design enables smooth rotation for studying quantized vortices with minimal space and connections.
Area of Science:
- Low-temperature physics
- Quantum fluid dynamics
- Experimental apparatus design
Background:
- Superfluid helium-4 (4He) exhibits quantized vortices, crucial for understanding quantum fluid behavior.
- Investigating vortex dynamics requires specialized cryogenic equipment capable of rotation.
Purpose of the Study:
- To present the design and performance of a novel rotating dilution refrigerator.
- To facilitate the study of quantized vortex dynamics in superfluid (4)He.
Main Methods:
- The apparatus integrates all operational and measurement equipment onto two synchronously driven, mechanically decoupled rotating carousels.
- Utilizes minimal laboratory space with only two connections for power and gas recovery.
- Rotation stability was measured up to 2.5 rad s(-1).
Main Results:
- The rotating dilution refrigerator demonstrates smooth rotation stability up to approximately 10(-3) rad s(-1) at angular velocities exceeding 2.5 rad s(-1).
- The behavior of a high-Q mechanical resonator under rapid rotational changes was successfully investigated.
Conclusions:
- The new rotating dilution refrigerator offers a simplified, space-efficient solution for superfluid (4)He research.
- The system's performance supports detailed investigations into quantized vortex dynamics.
