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Related Experiment Video

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Cryogenic Liquid Jets for High Repetition Rate Discovery Science

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Published on: May 9, 2020

Semiautomatic liquid helium transfer controller.

J Vanderkooy¹, C S Kang

¹Department of Physics, University of Waterloo, Waterloo, Ontario, Canada.

The Review of Scientific Instruments

|December 1, 1978

Summary

This summary is machine-generated.

This study introduces a novel controller for extended liquid helium transfers into cryostats, requiring minimal supervision. The system automatically manages dewar pressure using a controlled heater, ensuring safe and efficient operation.

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Area of Science:

Cryogenics
Experimental Physics
Instrumentation

Background:

Long-duration cryogenic experiments require reliable liquid helium supply.
Manual supervision of liquid helium transfers is labor-intensive and prone to error.
Maintaining stable dewar pressure is crucial for safe and efficient helium transfer.

Purpose of the Study:

To develop an automated controller for liquid helium transfers.
To enable long-duration cryogenic operations with reduced supervision.
To enhance the safety and efficiency of cryostat filling procedures.

Main Methods:

Implementation of a feedback-controlled electrical heater system.
Integration of pressure sensors for real-time dewar monitoring.
Development of an automated shut-off mechanism based on dewar emptiness detection.

Main Results:

The controller facilitates liquid helium transfers lasting extended periods.
Minimal operator supervision is necessary during the transfer process.
Dewar pressure is effectively maintained within a stable range.
The system reliably shuts off the heater upon detecting an empty dewar.

Conclusions:

The developed controller significantly improves the automation of liquid helium transfers.
This technology allows for longer, more reliable cryogenic experiments.
The system offers a safe and efficient solution for cryostat helium management.