ISSN 0021-3454 (print version)
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vol 64 / March, 2021
Article

DOI 10.17586/0021-3454-2017-60-11-1088-1091

UDC 54.084

HARDWARE AND SOFTWARE SYSTEM FOR CHROMATOGRAPHIC DETECTOR OF THERMAL CONDUCTIVITY IN THE MUSUN EXPERIMENT

K. A. Ivshin
Petersburg Nuclear Physics Institute; Junior Scientist


P. A. Kravtsov
B. P. Konstantinov Petersburg Nuclear Physics Institute RAS; Department of Instruments and Methods of Polarization Measurements of St. Petersburg State University of Information Technologies, Mechanics and Optics; Senior Scientist


V. A. Trofimov
B. P. Konstantinov Petersburg Nuclear Physics Institute RAS; Department of Instruments and Methods of Polarization Measurements of St. Petersburg State University of Information Technologies, Mechanics and Optics;; Senior Scientist


S. S. Kiselev
Saint Petersburg National Research University of Information Technologies, Mechanics and Optics; Associate Professor


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Abstract. Basic technical and methodical approaches to the problem of chemical impurities measurements in hydrogen are described. Two ways of increasing sensitivity have been developed in the international nuclear experiment MuSun. The first one is a modification of the sampling procedure. The second one is improvement of the measurement system based on a chromatograph. These techniques provide precise measurements of the atmospheric impurities concentration in hydrogen at the level of 1ppb (part per billion).
Keywords: ultrapure hydrogen, chromatography, impurity concentration method, preamplifier

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