Evaluation of an electrostatic dust removal system with potential application in next-step fusion devices
- Grinnell College, 1115 8th Avenue, Grinnell, Iowa 50112-1616 (United States)
- Swarthmore College, 500 College Ave., Swarthmore, Pennsylvania 19081 (United States)
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, New Jersey 08543 (United States)
- NASA Electrostatics and Surface Physics Laboratory, Kennedy Space Center, Florida 32899 (United States)
The 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 mm{sup 3} volume of carbon and tungsten particles were moved in under 5 s. 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).
- OSTI ID:
- 22062323
- Journal Information:
- Review of Scientific Instruments, Vol. 82, Issue 5; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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