Accelerates very small particles typically ~1µm diameter to high velocities in order to recreate the effects of continual micro-meteoroid dust impacts. The dust particles are directed into a primary chamber (the "pot") where the target (airless body surface analogue or spacecraft material, maximum 15 cm diameter) is placed for long-term exposure simulation. For larger targets, such as complete spacecraft instruments for testing etc, a secondary 1 metre diameter chamber is used (the "churn").

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