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Proceedings Paper

Fiber-optic level indicator for liquid hydrogen
Author(s): Sergei Khotiaintsev; Volodymyr Svyryd
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Paper Abstract

This paper describes a fiber-optic level indicator designed to detect the liquid interface in the liquid-hydrogen storage tanks. The considerations which led to the choice of the particular fiber-optic sensor and the construction of the measurement system are discussed. A fiber-optic refractometric transducer with the detection element of ellipsoidal form was developed which features a step-like response to the external refractive index in the narrow interval of this quantity between unity (gas) and 1.0974 (liquid hydrogen). The fiber-optic inputs to the storage system secure the reduced heat ingress in the liquid-hydrogen in comparison to sensors with electrical wires. The fiber-optic transducer features small dimensions, is strong mechanically, and supports multiple cycles of cooling to 20 K and heating to the ambient temperature. The device successfully indicated the level of liquid interface in a liquid-hydrogen storage tank under the maximum excess pressure in the tank of 4 MPa. The paper discusses a number of prospective applications of the developed fiber-optic transducer in the liquid-hydrogen storage systems.

Paper Details

Date Published: 16 May 2008
PDF: 4 pages
Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70045T (16 May 2008); doi: 10.1117/12.786813
Show Author Affiliations
Sergei Khotiaintsev, National Autonomous Univ. of Mexico (Mexico)
Volodymyr Svyryd, National Autonomous Univ. of Mexico (Mexico)

Published in SPIE Proceedings Vol. 7004:
19th International Conference on Optical Fibre Sensors
David Sampson; Stephen Collins; Kyunghwan Oh; Ryozo Yamauchi, Editor(s)

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