Use of superconducting liquid helium level sensor as a temperature sensor and its applications

Cryogenics ◽  
2021 ◽  
pp. 103413
Author(s):  
Anup Kumar Choudhury
Keyword(s):  
Liquid Helium ◽  
Temperature Sensor ◽  
Level Sensor ◽  
Helium Level

A capacitive liquid helium level sensor instrument

Cryogenics ◽  
1999 ◽  
Vol 39 (5) ◽  
pp. 485-487 ◽  
Author(s):  
D.K Hilton ◽  
J.S Panek ◽  
M.R Smith ◽  
S.W Van Sciver
Keyword(s):  
Liquid Helium ◽  
Level Sensor ◽  
Helium Level

scholarly journals Arduino-Based Novel Hardware Design for Liquid Helium Level Measurement

2018 ◽  
Vol 23 (5) ◽  
pp. 456-462 ◽  
Author(s):  
Pathan Fayaz Khan ◽  
S. Sengottuvel ◽  
Rajesh Patel ◽  
Awadhesh Mani ◽  
K. Gireesan
Keyword(s):  
Liquid Helium ◽  
Capillary Tube ◽  
Sudden Change ◽  
Hardware Design ◽  
Cost Effective ◽  
Rate Of Change ◽  
Level Measurement ◽  
Level Sensor ◽  
Helium Level ◽  
Thermoacoustic Oscillations

Liquid helium (LHe) is used as a cryogen in a variety of applications involving superconductivity and is routinely monitored for conducting low-temperature experiments. Thermoacoustic oscillations, which are inevitably present inside closed LHe containers, are utilized for level detection by sensing the vibrations at the warm end of a thin capillary tube inserted into the Dewar. The position of the capillary tube at which a sudden change occurs in these oscillations is manually sensed to identify the liquid level. The present work proposes a novel hardware design to identify the thermoacoustic oscillations in a reliable way using an accelerometer driven by an Arduino microcontroller. Further, an automated approach has been devised to quantify the rate of change of these helium oscillations to measure the LHe level. The proposed method has been tested during several trials on a 120 L and 100 L capacity Dewar using the proposed hardware, and the mean error in measuring the LHe level was calculated to be less than 1 cm in comparison with the gold standard niobium-titanium level sensor. The results encourage the use of the proposed method to evolve as a cost-effective alternative to the widely used superconducting level sensors in measuring LHe level.

Semiconductor liquid helium level sensor

Cryogenics ◽  
1986 ◽  
Vol 26 (1) ◽  
pp. 45-46 ◽  
Author(s):  
J. Cosier
Keyword(s):  
Liquid Helium ◽  
Level Sensor ◽  
Helium Level

Simple long-lasting liquid helium level indicator

Cryogenics ◽  
1972 ◽  
Vol 12 (3) ◽  
pp. 234 ◽  
Author(s):  
J.M. Laplant ◽  
D.J. Flood
Keyword(s):  
Liquid Helium ◽  
Level Indicator ◽  
Helium Level

scholarly journals Two-channel electric liquid helium level meter

2019 ◽  
pp. 52-54
Author(s):  
K. K. Kim ◽  
◽  
A. A. Tkachuk ◽  
A. A. Kuznetsov ◽  
◽  
...  
Keyword(s):  
Liquid Helium ◽  
Level Meter ◽  
Helium Level

RSFQ TECHNOLOGY: PHYSICS AND DEVICES

2001 ◽  
Vol 11 (01) ◽  
pp. 257-305 ◽  
Author(s):  
PAUL BUNYK ◽  
KONSTANTIN LIKHAREV ◽  
DMITRY ZINOVIEV
Keyword(s):  
Magnetic Flux ◽  
Liquid Helium ◽  
Future Development ◽  
Power Dissipation ◽  
Device Physics ◽  
Flux Quantum ◽  
Fabrication Technology ◽  
Rapid Single Flux Quantum ◽  
Low Power Dissipation ◽  
Helium Level

Rapid Single-Flux-Quantum (RSFQ) logic, based on the representation of digital bits by single quanta of magnetic flux in superconducting loops, may combine several-hundred-GHz speed with extremely low power dissipation (close to 10-18 Joule/bit) and very simple fabrication technology. The drawbacks of this technology include the necessity of deep (liquid-helium-level) cooling of RSFQ circuits and the rudimentary level of the currently available fabrication and testing facilities. The objective of this paper is to review RSFQ device physics and also discuss in brief the prospects of future development of this technology in the light of the tradeoff between its advantages and handicaps.

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