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Abstract:
We have designed and operated a test module of multistep avalanche chamber with effective detection area of 9 by 9 cm2. Argon-acetone mixture gas is provided by a simple gas mixing system, and mixture ratio can be modulated by gas flow. The performance of the chamber has been investigated by use of 55Fe 5.9 keV X-ray source at acetone concentration in argon of 2.7%, and the effect of acetone concentration to the chamber has been measured.
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