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DM - LArTPC DocDB - Fermilab

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Achieving good lifetime in an unevacuated vessel<br />

Liquid Argon Purity Demonstration<br />

Demonstrate good life-time in an<br />

industrial vessel without evacuation.<br />

All previous detectors have been<br />

evacuated before filling<br />

Atmosphere will be removed by<br />

`argon’ piston, then argon gas will be<br />

circulated through filters to achieve<br />

~ 1 ppm Oxygen.<br />

Heaters in the insulation can warm the<br />

walls to 60 C.<br />

Filtration system sized for 30 tons of<br />

Argon at 1 ppm Oxygen. Pump will<br />

circulate entire volume in

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