Results From the Upgraded Porous Plug Injection System for Studies of Hydrocarbon Dissociation and Transport in DIII-D

POSTER

Abstract

Calibrated spectroscopic measurements of dissociation fragments resulting from hydrocarbon influx in a tokamak divertor have been taken with the use of the Mk II Porous Plug Injector (PPI) in DIII-D. The PPI was upgraded to include a small orifice flow restrictor for more precise gas flow control, achieving flow rates corresponding to sputtering yields of 0.5{\%}-2{\%} in attached and detached divertor plasmas. Results and analysis of digital video, and medium and high resolution spectroscopic data collected are presented and compared with those of the Mk I PPI and similar experiments at JET, TEXTOR, and ASDEX.

*Supported by the US DOE under W-7405-ENG-48, DE-FC02-04ER54698, DE-FG02-04ER54762, DE-FG02-04ER54758, DE-AC05-00OR22725, and DE-AC04-94AL85000 and NSERC Canada.

Authors

  • A.G. McLean

    • U. Toronto

  • J.W. Davis

  • Y. Mu

  • P.C. Stangeby

    • U. Toronto

  • S.L. Allen

    • LLNL
    • Lawrence Livermore National Laboratory

  • R. Ellis

  • M.E. Fenstermacher

  • M. Groth

  • C.J. Lasnier

    • LLNL

  • B.D. Bray

    • General Atomics
    • GA

  • N.H. Brooks

  • T.W. Petrie

  • W.P. West

  • C.P.C. Wong

    • GA

  • D.G. Whyte

    • MIT

  • J.A. Boedo

  • E.M. Hollmann

  • D. Nishijima

  • D.L. Rudakov

    • UCSD

  • R.J. Colchin

  • R.C. Isler

    • ORNL

  • J.G. Watkins

    • SNL

  • S. Brezinsek

  • M. Jakubowski

  • A. Krater

    • Juelich