A Regenerable Filter for Liquid Argon Purification

Date
Authors
Curioni, A.
Fleming, B. T.
Jaskierny, W.
Kendziora, C.
Krider, J.
Pordes, S.
Soderberg, M.
Spitz, J.
Tope, T.
Wongjirad, T.
Journal Title
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Abstract
Description
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 about 250 degrees Celsius 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.
Comment: 12 pages with 9 figures
Keywords
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
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