Sub-millimeter Size Sensors for Measurements in Cryogenic Turbulence

Classical turbulence research is advancing by utilizing MEMS temperature and pressure fluctuation sensor technology. Turbulence research at cryogenic temperatures has many advantages over the classical approach, such as extreme stability of control parameters and very high Reynolds numbers in small...

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Bibliographic Details
Main Authors: Zhou, Yihui, Mitin, Vadim F, Liu, Shu-chen, Luria, Isaac, Padron, Mario, Adjimambetov, Ridvan, Ihas, Gary G
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:Classical turbulence research is advancing by utilizing MEMS temperature and pressure fluctuation sensor technology. Turbulence research at cryogenic temperatures has many advantages over the classical approach, such as extreme stability of control parameters and very high Reynolds numbers in small apparatus. However, changes in material properties from room temperature to 1 K (and below) make most sensors unusable at low temperature. A new type of thermistor, incorporating a Ge-film deposited on a GaAs substrate, has been designed. It provides high sensitivity in the range of 20 mK to 5 K. In this paper, the design and characteristics of these sensors is discussed, and experimental data from three thermistors is presented. Progress on a miniature pressure transducer is also described.
ISSN:0094-243X
DOI:10.1063/1.2355331