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Evaluation of an Electrostatic Dust Removal System with Potential Application in Next-Step Fusion DevicesThe ability to manage inventories of carbon, tritium, and high-Z elements in fusion plasmas depends on means for effective dust removal. A dust conveyor, based on a moving electrostatic potential well, was tested with particles of tungsten, carbon, glass and sand. A digital microscope imaged a representative portion of the conveyor, and dust particle size and volume distributions were derived before and after operation. About 10 cu mm volume of carbon and tungsten particles were moved in under 5 seconds. The highest driving amplitude tested of 3 kV was the most effective. The optimal driving frequency was 210 Hz (maximum tested) for tungsten particles, decreasing to below 60 Hz for the larger sand particles. Measurements of particle size and volume distributions after 10 and 100 cycles show the breaking apart of agglomerated carbon, and the change in particle distribution over short timescales 1 s).
Document ID
20110008731
Document Type
Preprint (Draft being sent to journal)
Authors
Friesen, F. Q. L. (Grinnell Coll. IA, United States)
John, B. (Swarthmore Coll. PA, United States)
Skinner, C. H. (Princeton Plasma Physics Lab. Princeton, NJ, United States)
Roquemore, A. L. (Princeton Plasma Physics Lab. Princeton, NJ, United States)
Calle, C. I. (NASA Kennedy Space Center Cocoa Beach, FL, United States)
Date Acquired
August 25, 2013
Publication Date
January 19, 2011
Subject Category
Plasma Physics
Report/Patent Number
KSC-2011-054
Funding Number(s)
CONTRACT_GRANT: DE-AC02-09CH11466
Distribution Limits
Public
Copyright
Public Use Permitted.

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