LARGE SCALE PURIFICATION SYSTEM FOR A LIQUID ARGON TIME PROJECTION CHAMBER.

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作者
Doe, Peter J. [1 ]
Allen, Richard C. [1 ]
Biller, Steven D. [1 ]
Buehler, Gerhard [1 ]
Johnson, Wayne A. [1 ]
Chen, Herbert H. [1 ]
机构
[1] Univ of California, Irvine, CA, USA, Univ of California, Irvine, CA, USA
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摘要
A purification system based on reduced copper and molecular sieve has been built for a 7 m**3 liquid argon time projection chamber and it has been successfully tested. After the initial purification an attenuation length of 0. 7 m at 0. 5 kV cm** minus **1 was measured by drifting electrons over distances up to 28 cm. Further purification yielded attenuation lengths greater than equivalent to 3. 7 m at 0. 5 kV cm** minus **1 which corresponds to an impurity level of less than equivalent to 0. 2 ppb oxygen equivalent.
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页码:170 / 176
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