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perpendicular to the total edge magnetic field,
E ||
along each field line should cancel, with an expected
reduction in impurity source due to edge
plasma sputtering. Modeling indicates that this
configuration should lead to reduction of impurity
production by as much as an order of magnitude,
which would be a major help for all C-Mod
experiments using ICRF auxiliary power. Furthermore,
such results would have major positive
implications for ITER, which plans to use ICRF as
a major part of its auxiliary power complement,
and is expected to operate with tungsten plasma
facing divertor components.
Alcator Project Head Earl Marmar shows Senator Jon Tester of Montana (right)
the new advanced, field-aligned ICRF antenna, designed to test theories
related to impurity production during high-powered heating. Looking on are
Principal Research Scientist Steve Wukitch (left of Earl Marmar) and Miklos
Porkolab (right of Earl Marmar).
Representative Edward J. Markey (far right) views a monitor recording the interior of the
Alcator C-Mod tokamak, in anticipation of the next plasma shot. Accompanying him are
MIT alumnus Reiner Beeuwkes and his wife, Nancy; Congressional Aide Sarah Butler; PSFC
Director Miklos Porkolab and Senior Research Scientist Martin Greenwald. Nuclear science and
engineering graduate student Matt Reinke (seated) was running the experiment that day.
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