Fundamental investigation of a superconducting level sensor for liquid hydrogen with MgB2wire
Year: 2008
Type: conference-paper
Abstract: The feasibility study of a superconducting level sensor for liquid hydrogen with a magnesium-diboride (MgB 2 ) wire is carried out from an experimental point of view. The sample wire consists of a mono-cored MgB 2 superconductor and a cupronickel sheath, and several potential taps are attached to it at even intervals in order to understand the position of a threshold between the superconducting and resistive states roughly. The fabricated sensor is vertically located in a glass dewar vessel with an infill of liquid hydrogen, and the position of a preselected potential tap is adjusted by eye and hand to liquid level before starting a new measurement. Simulated operations with constant currents finally yield the future possibilities as the level sensor for liquid hydrogen with MgB 2 wire although the fabricated sensor has a few problems at present. In order to improve the performance of the sensor, the specifications required for MgB 2 wires will be reported elsewhere by applying the stability theory in superconductor composites and by simulating the operation with a numerical code.
Authors: K Kajikawa, K Tomachi, N Maema, M Matsuo, S Sato, K Funaki, H Kumakura, K Tanaka, M Okada, K Nakamichi, Y Kihara, T Kamiya, I Aoki
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W2010594762