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Observation of Plasma Behavior During the ECRH Injection by Using a High-Speed Camera in GAMMA 10

S. Kigure et al.

Fusion Science and Technology / Volume 63 / Number 1T / Pages 241-243

May 2013

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A new high-speed camera (MEMRECAM GX-1, NAC Inc.) has been installed at the GAMMA 10 central-cell. This camera observes two directions through vertical and horizontal ports by using dual optical fiber bundles. This paper describes the results of 2-D image of visible emission observed from the central-cell plasma during Supersonic Molecular Beam injection (SMBI) in the C-ECRH experiments. Observational results showed that the instability of plasma light-emission on the central-limiter was suppressed during SMBI and the plasma sustainability increased along the SMBI plenum pressure. Relationship between plasma sustainability and power of C-ECRH and/or the quantity of SMBI is also investigated.

 
 
 
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