Visualization of Magnetic Surfaces during Current Ramp-Up Phase Using Thermal Lithium Sheet Beam in CPD

Two dimensional electron density profile measurement has been performed in the spherical tokamak CPD (Compact PWI experimental Device) using Li sheet beam imaging technique. The topological change from the open magnetic field line configuration to the closed one is visualized by this technique. The...

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Bibliographic Details
Published in:Plasma and Fusion Research 2008/02/21, Vol.3, pp.010-010
Main Authors: KIKUKAWA, Tetsushi, ZUSHI, Hideki, MORISAKI, Tomohiro, BHATTACHARYAY, Rajendraprasad, RYOUKAI, Tomofumi, YOSHINAGA, Tomokazu, HASEGAWA, Makoto, HANADA, Kazuaki, IDEI, Hiroshi, Group, CPD Experimental
Format: Article
Language:English
Subjects:
current drive
EBW
ECRH
electron density profile
Li beam
magnetic flux surface
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Summary:Two dimensional electron density profile measurement has been performed in the spherical tokamak CPD (Compact PWI experimental Device) using Li sheet beam imaging technique. The topological change from the open magnetic field line configuration to the closed one is visualized by this technique. The plasma current can be driven by RF waves itself in a weak mirror configuration and a clear change is observed in plasma boundary as well as magnetic field topology associated with the transition of the current from low (∼1 kA) to high (∼3 kA) value.
ISSN:1880-6821
1880-6821
DOI:10.1585/pfr.3.010