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Suppression of electric and magnetic fluctuations and improvement of confinement due to current profile modification by biased electrode in Saha Institute of Nuclear Physics tokamak
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10.1063/1.4739074
/content/aip/journal/pop/19/7/10.1063/1.4739074
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/7/10.1063/1.4739074
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Temporal variation of (a) plasma current , (b) loop voltage , (c) intensity of line without bias voltage (light dotted line) and with bias voltage at −150 V (dark solid line); (d) electrode current and (e) applied bias voltage.

Image of FIG. 2.
FIG. 2.

Temporal variation of (a) plasma current and (b) energy confinement time with −70 V bias voltage (solid line) and without (dotted line).

Image of FIG. 3.
FIG. 3.

Radial profile at the edge of (a) electron density and (b) electron temperature with −80 V bias voltage (solid line) and without (dotted line).

Image of FIG. 4.
FIG. 4.

Temporal variation of plasma potentials at three radial locations at the edge with −140 V bias voltage (dark solid line) and without (light dotted line).

Image of FIG. 5.
FIG. 5.

Temporal variation of poloidal magnetic fields at three radial locations at the edge with −150 V bias voltage (solid line) and without (light dotted line).

Image of FIG. 6.
FIG. 6.

Radial profile of (a) plasma current density and (b) safety factor q at the edge with −80 V bias voltage (solid line) and without (dotted line).

Image of FIG. 7.
FIG. 7.

Temporal variation of radial electric field and poloidal magnetic field at the edge with bias voltage (dark solid line) and without (light dotted line).

Image of FIG. 8.
FIG. 8.

Power spectra of fluctuations of (a) poloidal magnetic field at r = 6.4 cm and (b) floating potential at r = 6.3 cm. solid line: in presence of bias voltage of −140 V, dotted line: without bias voltage.

Image of FIG. 9.
FIG. 9.

Time history of frequency-filtered signals of two floating probes separated in poloidal direction by 0.35 cm in without electrode bias discharge. Frequency band = 35–36 kHz.

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/content/aip/journal/pop/19/7/10.1063/1.4739074
2012-07-20
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Suppression of electric and magnetic fluctuations and improvement of confinement due to current profile modification by biased electrode in Saha Institute of Nuclear Physics tokamak
http://aip.metastore.ingenta.com/content/aip/journal/pop/19/7/10.1063/1.4739074
10.1063/1.4739074
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