Skip to main content
eScholarship
Open Access Publications from the University of California

Fast-ion effects during test blanket module simulation experiments in DIII-D

  • Author(s): Kramer, GJ
  • Budny, BV
  • Ellis, R
  • Gorelenkova, M
  • Heidbrink, WW
  • Kurki-Suonio, T
  • Nazikian, R
  • Salmi, A
  • Schaffer, MJ
  • Shinohara, K
  • Snipes, JA
  • Spong, DA
  • Koskela, T
  • Van Zeeland, MA
  • et al.
Abstract

Fast beam-ion losses were studied in DIII-D in the presence of a scaled mock-up of two test blanket modules (TBM) for ITER. Heating of the protective tiles on the front of the TBM surface was found when neutral beams were injected and the TBM fields were engaged. The fast-ion core confinement was not significantly affected. Different orbit-following codes predict the formation of a hot spot on the TBM surface arising from beam ions deposited near the edge of the plasma. The codes are in good agreement with each other on the total power deposited at the hot spot, predicting an increase in power with decreasing separation between the plasma edge and the TBM surface. A thermal analysis of the heat flow through the tiles shows that the simulated power can account for the measured tile temperature rise. The thermal analysis, however, is very sensitive to the details of the localization of the hot spot, which is predicted to be different among the various codes. © 2011 IAEA, Vienna.

Many UC-authored scholarly publications are freely available on this site because of the UC Academic Senate's Open Access Policy. Let us know how this access is important for you.

Main Content
Current View