TITLE

Note: He puff system for dust detector upgrade

AUTHOR(S)
Rais, B.; Skinner, C. H.; Roquemore, A. L.
PUB. DATE
March 2011
SOURCE
Review of Scientific Instruments;Mar2011, Vol. 82 Issue 3, p036102
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Local detection of surface dust is needed for the safe operation of next-step magnetic fusion devices such as ITER. An electrostatic dust detector, based on a grid of interlocking circuit traces biased to 50 V, has been developed to detect dust on remote surfaces and was successfully tested for the first time on the National Spherical Torus Experiment. In this note, we report a helium puff system that clears residual dust from this detector and any incident debris or fibers that might cause a permanent short circuit. Two consecutive helium puffs delivered by three 0.45 mm nozzles at an angle of 30º cleared the entire 5 cm × 5 cm surface of the detector.
ACCESSION #
59744529

 

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