Author/Authors :
Curioni، نويسنده , , A. and Fleming، نويسنده , , B.T. and Jaskierny، نويسنده , , W. and Kendziora، نويسنده , , C. and Krider، نويسنده , , J. and Pordes، نويسنده , , S. and Soderberg، نويسنده , , M. R. Spitz، نويسنده , , J. and Tope، نويسنده , , T. and Wongjirad، نويسنده , , T.، نويسنده ,
Abstract :
A filter system for removing electronegative impurities from liquid argon is described. The active components of the filter are adsorbing molecular sieve and activated-copper-coated alumina granules. The system is capable of purifying liquid argon to an oxygen-equivalent impurity concentration of better than 30 parts per trillion, corresponding to an electron drift lifetime of at least 10 ms. Reduction reactions that occur at ∼ 250 ∘ C allow the filter material to be regenerated in situ through a simple procedure. In the following work we describe the filter design, performance, and regeneration process.
Keywords :
Oscillation , Liquid argon , LArTPC , Neutrino , Purity
