Evaluation of an Electrostatic Dust Removal System with Potential Application in Next-Step Fusion Devices

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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 mm3 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) ... continued below

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F.Q.L. Friesen, B. John, C.H. Skinner, A.L. Roquemore and C.I. Calle January 20, 2011.

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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 mm3 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).

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  • Review of Scientific Instruments

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  • Report No.: PPPL-4596
  • Grant Number: DE-ACO2-09CH11466
  • Office of Scientific & Technical Information Report Number: 1003010
  • Archival Resource Key: ark:/67531/metadc833127

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Office of Scientific & Technical Information Technical Reports

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  • January 20, 2011

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • Aug. 3, 2016, 3:16 p.m.

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F.Q.L. Friesen, B. John, C.H. Skinner, A.L. Roquemore and C.I. Calle. Evaluation of an Electrostatic Dust Removal System with Potential Application in Next-Step Fusion Devices, report, January 20, 2011; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc833127/: accessed November 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.