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Gas Chromatography: Types of Detectors-II

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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

An automatic liquid-nitrogen filling system for multiple Ge detectors.

Mitsuo Koizumi¹, Masumi Oshima, Yosuke Toh

¹Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency, Shirakata Shirane 2-4, Toukaimura, Naka, Ibaraki 319-1195, Japan. koizumi.mitsuo@jaea.go.jp

The Review of Scientific Instruments

|February 5, 2009

Summary

This study introduces an automated liquid nitrogen (LN(2)) filling system to eliminate manual refilling of Germanium (Ge) detector vessels. The system is ideal for moderate-scale Ge detector arrays, saving time and effort.

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Area of Science:

Physics
Instrumentation
Cryogenics

Background:

Germanium (Ge) detectors require continuous cooling with liquid nitrogen (LN(2)) for optimal performance.
Manual refilling of LN(2) in Dewar vessels is time-consuming and labor-intensive.
Existing solutions may not be suitable for moderate-scale detector arrays.

Purpose of the Study:

To develop and implement an automated system for refilling liquid nitrogen (LN(2)) in Dewar vessels for Ge detectors.
To reduce the manual labor and time associated with maintaining LN(2) levels.
To provide a practical solution for moderate-scale Ge detector applications.

Main Methods:

Development of an automatic LN(2) filling system.
Integration of the system with a dedicated LN(2) plant.
Implementation and testing of the system for Ge detector arrays.

Main Results:

Successful automation of the LN(2) refilling process for Ge detector Dewar vessels.
Significant reduction in time and effort required for daily LN(2) maintenance.
The system demonstrated effectiveness for arrays with fewer than 20 Ge detectors.

Conclusions:

The developed automatic LN(2) filling system effectively eliminates the need for manual refilling.
This automated solution is highly beneficial for moderate-scale Ge detector arrays.
The system offers a practical and efficient method for maintaining cryogenic conditions in Ge detectors.