Observations Concerning the Injection of a Lithium Aerosol into the Edge of TFTR Discharges

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A new method of actively modifying the plasma-wall interaction was tested on the Tokamak Fusion Test Reactor. A laser was used to introduce a directed lithium aerosol into the discharge scrape-off layer. The lithium introduced in this fashion ablated and migrated preferentially to the limiter contact points. This allowed the plasma-wall interaction to be influenced in situ and in real time by external means. Significant improvement in energy confinement and fusion neutron production rate as well as a reduction in the plasma Zeff have been documented in a neutral-beam-heated plasma. The introduction of a metallic aerosol into the plasma edge ... continued below

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316 Kilobytes pages

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Mansfield, D.K.; Johnson, D.W.; Grek, B.; Kugel, H.; Bell, M.G. & al, et December 13, 2000.

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A new method of actively modifying the plasma-wall interaction was tested on the Tokamak Fusion Test Reactor. A laser was used to introduce a directed lithium aerosol into the discharge scrape-off layer. The lithium introduced in this fashion ablated and migrated preferentially to the limiter contact points. This allowed the plasma-wall interaction to be influenced in situ and in real time by external means. Significant improvement in energy confinement and fusion neutron production rate as well as a reduction in the plasma Zeff have been documented in a neutral-beam-heated plasma. The introduction of a metallic aerosol into the plasma edge increased the internal inductance of the plasma column and also resulted in prompt heating of core electrons in Ohmic plasmas. Preliminary evidence also suggests that the introduction of an aerosol leads to both edge poloidal velocity shear and edge electric field shear.

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316 Kilobytes pages

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INIS; OSTI as DE00769316

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  • Other Information: PBD: 13 Dec 2000

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  • Report No.: PPPL-3526
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/769316 | External Link
  • Office of Scientific & Technical Information Report Number: 769316
  • Archival Resource Key: ark:/67531/metadc716589

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  • December 13, 2000

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

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  • April 15, 2016, 9:48 p.m.

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Mansfield, D.K.; Johnson, D.W.; Grek, B.; Kugel, H.; Bell, M.G. & al, et. Observations Concerning the Injection of a Lithium Aerosol into the Edge of TFTR Discharges, report, December 13, 2000; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc716589/: accessed May 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.