Methane Pentration in Diii-D Elming H-Mode Plasmas Metadata

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Title

  • Main Title Methane Pentration in Diii-D Elming H-Mode Plasmas

Creator

  • Author: West, W. P.
    Creator Type: Personal
  • Author: Lasnier, C. J.
    Creator Type: Personal
  • Author: Whyte, D. G.
    Creator Type: Personal
  • Author: Isler, R. C.
    Creator Type: Personal
  • Author: Evans, T. E.
    Creator Type: Personal
  • Author: Jackson, G. L.
    Creator Type: Personal
  • Author: Rudakov, D. L.
    Creator Type: Personal
  • Author: Wade, M. R.
    Creator Type: Personal
  • Author: Strachan, J.
    Creator Type: Personal

Contributor

  • Sponsor: United States
    Contributor Type: Organization

Publisher

  • Name: General Atomic Company
    Place of Publication: United States
    Additional Info: General Atomics (United States)

Date

  • Creation: 2002-06-01

Language

  • English

Description

  • Content Description: Carbon penetration into the core plasma during midplane and divertor methane puffing has been measured for DIII-D ELMing H-mode plasmas. The methane puffs are adjusted to a measurable signal, but global plasma parameters are only weakly affected (line average density, <n{sub e}> increases by < 10%, energy confinement time, {tau}{sub E} drops by < 10%). The total carbon content is derived from C{sup +6} density profiles in the core measured as a function of time using charge exchange recombination spectroscopy. The methane penetration factor is defined as the difference in the core content with the puff on and puff off, divided by the carbon confinement time and the methane puffing rate. In ELMing H-mode discharges with ion {del}B drift direction into the X-point, increasing the line averaged density from 5 to 8 x 10{sup 19} m{sup -3} dropped the penetration factor from 6.6% to 4.6% for main chamber puffing. The penetration factor for divertor puffing was below the detection limit (<1%). Changing the ion {del}B drift direction to away from the X-point decreased the penetration factor by more than a factor of five for main chamber puffing.
  • Physical Description: Medium: X; Size: 14 pages

Subject

  • Keyword: Methane
  • Keyword: Confinement Time
  • Keyword: Charge Exchange
  • Keyword: Doublet-3 Device
  • Keyword: Sensitivity
  • Keyword: Divertors
  • Keyword: Spectroscopy
  • Keyword: Recombination
  • Keyword: Carbon
  • STI Subject Categories: 03 Natural Gas
  • Keyword: Plasma

Source

  • Conference: 15th International Conference on Plasma Surface Interactions in Controlled Fusion Devices, Gifu (JP), 05/27/2002--05/31/2002; Other Information: THIS IS A PREPRINT OF A PAPER PRESENTED AT THE 15TH INTERNATIONAL CONFERENCE ON PLASMA SURFACE INTERACTIONS IN CONTROLLED FUSION DEVICES, MAY 27-31, 2002, IN GIFU, JAPAN, AND TO BE PUBLISHED IN THE ''PROCEEDINGS''

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Grant Number: AC03-99ER54463
  • Office of Scientific & Technical Information Report Number: 804697
  • Archival Resource Key: ark:/67531/metadc734319

Note

  • Display Note: Oakland Operations Office, Oakland, CA
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