Since 18 of December 2019 conferences.iaea.org uses Nucleus credentials. Visit our help pages for information on how to Register and Sign-in using Nucleus.

8–13 Oct 2012
US/Pacific timezone

EX/P4-26: Modification of Toroidal Flow in the STOR-M Tokamak

10 Oct 2012, 14:00
4h 45m
Poster Room (Area F-B)

Poster Room (Area F-B)

Poster EXS - Magnetic Confinement Experiments: Stability Poster: P4

Speaker

Mr Chijin Xiao (Canada)

Description

Flow measurements using ion Doppler spectroscopy (IDS) have been recently used to study toroidal flow velocities of impurity ions. By selecting ion species, such as a CIII line (464.7 nm) with emisiion intensity peaking at the radial location near r=7 cm, an OV line (650.0 nm) at, and CVI line (529.0 nm) near the plasma core, an estimated radial resolution of flow velocities can be achieved through a single line of sight along the tangential direction of the torus. During nominal ohmic discharges, the toroidal flow is in the counter-current direction in the core region at r~0 cm (CVI line) and r=4 cm (OV line) and changes to co-current direction towards the edge at r=7 cm (CIII line). In the extreme edge and scrape-off-layer (SOL), the flow is also in the co-current direction as measured by a movable Mach probe. Resonant magnetic perturbations (RMP) using a set of resonant helical coils in the m/n=2/1 configuration [1] or tangential compact torus injection [2] changes the flow towards the co-current direction in all regions, while during the improved confinement phase triggered by fast gas puffing, the flow changes towords the counter-current direction. [1] ELGRIW S., LIU D., ASAI T., HIROSE A., XIAO C., Nucl. Fusion 51, 113008 (2011). [2] XIAO C., SEN S., HIROSE A., Phys. Plasmas 11, 4041 (2004).

Country or International Organization of Primary Author

Canada

Primary author

Mr Chijin Xiao (Canada)

Co-authors

Prof. Akira Hirose (University of Saskatchewan) Dr M. Dreval (Institute of Plasma Physics NSC KIPT) Mr M. Hubeny (University of Saskatchewan) Mr Sayf Elgriw (University of Saskatchewan) Dr T Asai (Nihon University) Dr T Onchi (University of Saskatchewan) Mr Yelu Liu (University of Saskatchewan) Ms Yue Ding (University of Saskatchewan)

Presentation materials

There are no materials yet.