High-temperature superconducting level meter for liquid argon detectors
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AuthorBueno Villar, Antonio; Melgarejo-Fernández, Antonio Jesús; Navarro, J. L.; Navas, Sergio; Ruiz, A. G.
Institute of Physics
Cryogenic detectorsSuperconductive detectorsControl and monitor systems on-line
Bueno, A.; et al. High-temperature superconducting level meter for liquid argon detectors. Journal of Instrumentation, 3: P12001 (2008). [http://hdl.handle.net/10481/29082]
SponsorshipThis work has been carried out under the auspices of the Spanish Ministry of Education & Science (Grant FPA2006-00684).
Capacitive devices are customarily used as probes to measure the level of noble liquids in detectors operated for neutrino studies and dark matter searches. In this work we describe the use of a high-temperature superconducting material as an alternative to control the level of a cryogenic noble liquid. Lab measurements indicate that the superconductor shows a linear behaviour, a high degree of stability and offers a very accurate determination of the liquid volume. This device is therefore a competitive instrument and shows several advantages over conventional level meters.