Rapidly Moving Divertor Plates In A Tokamak
Authors: Stewart Zweben
Abstract:
It may be possible to replace conventional actively
cooled tokamak divertor plates with a set of rapidly
moving, passively cooled divertor plates on rails. These
plates would absorb the plasma heat flux with their
thermal inertia for ~10-30 sec, and would then be
removed from the vessel for processing. When outside
the tokamak, these plates could be cooled, cleaned,
recoated, inspected, and then returned to the vessel in
an automated loop. This scheme could provide nearoptimal
divertor surfaces at all times, and avoid the
need to stop machine operation for repair of damaged
or eroded plates. We describe various possible divertor
plate designs and access geometries, and discuss an
initial design for a movable and removable divertor
module for NSTX-U.
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Presented at: TOFE-19 Conference, Las Vegas, NV (Nov. 7-11, 2010)
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Download PPPL-4622 (pdf 1.06M B 6 pp)
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