Chromatographic 3He purification system, with an acoustic purity monitor
POSTER
Abstract
A system for Helium extraction and purification (SHeEP) is constructed around a chromatographic cylinder filled with activated charcoal to remove 4He contamination from 3He gas [1]. In order to monitor the composition of the mixture during the process, an acoustic cavity is designed. The acoustic cavity measures the average atomic mass of the mixture by measuring the speed of sound [2][3]. The sensitivity of the acoustic cavity is estimated to be 0.04%. It provides a cheap alternative to a mass spectrometer.
[1] Dmitriev, V. V. (2004). "Purification of 3He from a 4He impurity using adsorption". Instruments and Experimental Techniques, 47, 567-569.
[2] Kagiwada, R. S., and Rudnick, I. (1970). "Note on a simple method for determining the isotropic concentration of a 3He-4He gas". J. Low Temp. Phys. 3, 113.
[3] Lin, H., et al, (2013). "Improved determination of the Boltzmann constant using a single fixed-length cylindrical cavity". Metrologia, 50, 417-432.
[1] Dmitriev, V. V. (2004). "Purification of 3He from a 4He impurity using adsorption". Instruments and Experimental Techniques, 47, 567-569.
[2] Kagiwada, R. S., and Rudnick, I. (1970). "Note on a simple method for determining the isotropic concentration of a 3He-4He gas". J. Low Temp. Phys. 3, 113.
[3] Lin, H., et al, (2013). "Improved determination of the Boltzmann constant using a single fixed-length cylindrical cavity". Metrologia, 50, 417-432.
Presenters
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Wenguang Jiang
University of Florida, Physics, University of Florida
Authors
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Wenguang Jiang
University of Florida, Physics, University of Florida
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Yoonseok Lee
University of Florida, Physics, University of Florida
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Brodie Popovic
Physics, Duke University, Department of Physics, Duke University
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Colin Barquist
University of Florida, Physics, University of Florida