Analysis of D pellet injection experiments in the W7-AS Stellarator

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A centrifugal injector was used to inject deuterium pellets (with 3--5 x 10{sup 19} atoms) at approx. equal 600 m/s into current-less, nearly shear-less plasmas in the Wendelstein 7-AS (W7-AS) stellarator. The D pellet was injected horizontally at a location where the non-circular and non-axisymmetric plasma cross section is nearly triangular. Visible-light TV pictures usually showed the pellet as a single ablating mass in the plasma, although the pellet occasionally broke in two or splintered into a cloud of small particles. The density evolution following pellet injection and the effect of pellet injection on energy confinement and fluctuations are discussed.

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7 p.

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Lyon, J.F.; Baylor, L.R.; Baldzuhn, J.; Fiedler, S.; Hirsch, M.; Kuehner, G. et al. July 1, 1997.

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A centrifugal injector was used to inject deuterium pellets (with 3--5 x 10{sup 19} atoms) at approx. equal 600 m/s into current-less, nearly shear-less plasmas in the Wendelstein 7-AS (W7-AS) stellarator. The D pellet was injected horizontally at a location where the non-circular and non-axisymmetric plasma cross section is nearly triangular. Visible-light TV pictures usually showed the pellet as a single ablating mass in the plasma, although the pellet occasionally broke in two or splintered into a cloud of small particles. The density evolution following pellet injection and the effect of pellet injection on energy confinement and fluctuations are discussed.

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7 p.

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INIS; OSTI as DE97008549

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  • 24. EPS conference on controlled fusion and plasma physics, Berchtesgaden (Germany), 9-13 Jun 1997

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  • Other: DE97008549
  • Report No.: CONF-9706131--25
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 634118
  • Archival Resource Key: ark:/67531/metadc695315

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  • July 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Jan. 21, 2016, 3:24 p.m.

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Lyon, J.F.; Baylor, L.R.; Baldzuhn, J.; Fiedler, S.; Hirsch, M.; Kuehner, G. et al. Analysis of D pellet injection experiments in the W7-AS Stellarator, article, July 1, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc695315/: accessed April 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.