A concept for a kilotonne-scale modular LArTPC using pixel readout, resistive field shells, and optical segmentation, proposed for a DUNE far detector module.
Experimental study of electric breakdowns in liquid argon at centimeter scale
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abstract
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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A New Concept for Kilotonne Scale Liquid Argon Time Projection Chambers
A concept for a kilotonne-scale modular LArTPC using pixel readout, resistive field shells, and optical segmentation, proposed for a DUNE far detector module.