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Diamagnetic loop measurement in Korea Superconducting Tokamak Advanced Research machine
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10.1063/1.3600455
/content/aip/journal/rsi/82/6/10.1063/1.3600455
http://aip.metastore.ingenta.com/content/aip/journal/rsi/82/6/10.1063/1.3600455

Figures

Image of FIG. 1.
FIG. 1.

Schematic drawing of poloidal loops as the DL, the cross-sectional view of the DL, and the DL, with ceramic brakes for electric disconnection of outer sheath of MgO cable, located at the same toroidal position inside the KSTAR vacuum vessel, which is enclosed with the TF and PF coils. Here, DLCC03, DLM03, and DLC03 represent the compensation poloidal loop, concentric inner and outer poloidal loops, respectively.

Image of FIG. 2.
FIG. 2.

Time evolutions during vacuum flux measurement: (a) the applied TF coil current and magnetic fluxes measured by two poloidal loops and (b) the applied PF2 coil current and magnetic fluxes measured by two poloidal loops without the toroidal field.

Image of FIG. 3.
FIG. 3.

Time evolutions during the activation of the PF coils under the toroidal field of 2 T without plasma: (a) the constant TF coil current, (b) the applied PF coil currents, (c) magnetic fluxes measured by the two poloidal loops, (d) the DL signal with only the TF compensation, and (e) the DL signal with both the PF and TF compensation.

Image of FIG. 4.
FIG. 4.

Typical time evolution during a plasma discharge for ohmically heated plasma: (a) plasma current, (b) loop voltage, (c) line density, (d) diamagnetic flux, and (e) poloidal beta, and (f) stored energy.

Image of FIG. 5.
FIG. 5.

Typical time evolution during a plasma discharge for ECH heated plasma: (a) plasma current, (b) ECH power, (c) line density, (d) diamagnetic flux, (e) poloidal beta, and (f) stored energy.

Image of FIG. 6.
FIG. 6.

Typical time evolution during a plasma discharge for ECH, NB, and ICRF heated plasma: (a) plasma current, (b) heating power, (c) line density, (d) diamagnetic flux, (e) poloidal beta, and (f) stored energy.

Tables

Generic image for table
Table I.

Coefficients for compensating the PF pickup in the DL signal contributed by each PF coil, which are determined by the ratio of the pickup in the DL signal to each PF coil current from the vacuum flux measurements during the activation of each PF coil. Here, the RC constant time of the integrator is 20 ms.

Generic image for table
Table II.

Comparison between the measured stored energy and the estimated kinetic energy for circular ohmically heated plasmas in the KSTAR machine. Here, n eL , T e (0), and T i (0) mean the line density of plasma, central electron, and ion temperatures, respectively.

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/content/aip/journal/rsi/82/6/10.1063/1.3600455
2011-06-17
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Diamagnetic loop measurement in Korea Superconducting Tokamak Advanced Research machine
http://aip.metastore.ingenta.com/content/aip/journal/rsi/82/6/10.1063/1.3600455
10.1063/1.3600455
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