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Experimental study of electric breakdowns in liquid argon at centimeter scale

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arxiv 1401.6693 v2 pith:LO7V7YBK submitted 2014-01-26 physics.ins-det hep-ex

classification physics.ins-dethep-ex
keywords argonliquidbreakdownsdielectricdistanceselectricresultsvoltage
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In this paper we present results on measurements of the dielectric strength of liquid argon near its boiling point and cathode-anode distances in the range of 0.1 mm to 40 mm with spherical cathode and plane anode. We show that at such distances the applied electric field at which breakdowns occur is as low as 40 kV/cm. Flash-overs across the ribbed dielectric of the high voltage feed-through are observed for a length of 300 mm starting from a voltage of 55 kV. These results contribute to set reference for the breakdown-free design of ionization detectors, such as Liquid Argon Time Projection Chambers (LAr TPC).

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  1. A New Concept for Kilotonne Scale Liquid Argon Time Projection Chambers

    physics.ins-det 2019-08 conditional novelty 6.0 of 10

    A concept for a kilotonne-scale modular LArTPC using pixel readout, resistive field shells, and optical segmentation, proposed for a DUNE far detector module.

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