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Perturbative studies of toroidal momentum transport using neutral beam injection modulation in the Joint European Torus: Experimental results, analysis methodology, and first principles modeling
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10.1063/1.3480640
/content/aip/journal/pop/17/9/10.1063/1.3480640
http://aip.metastore.ingenta.com/content/aip/journal/pop/17/9/10.1063/1.3480640
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Time traces of the modulated NBI power, , , and and the two different components of the torque density for JET shot 66128 (noncompensated case).

Image of FIG. 2.
FIG. 2.

Steady-state radial profiles at of , , , , and torque density for JET shot 66128.

Image of FIG. 3.
FIG. 3.

Time traces of the total NBI power, , , and at and the total torque density at and for JET shot 73700 (compensated case).

Image of FIG. 4.
FIG. 4.

Steady-state radial profiles at of , , , , and torque density for JET shot 73700.

Image of FIG. 5.
FIG. 5.

Radial profiles of and at 6.25 Hz in shot 66128 for (a) , (b) , and (c) . In (a) and (c) the data corrected for oscillating plasma position are shown.

Image of FIG. 6.
FIG. 6.

Radial profiles of (black squares) and (red circles) at 8.33 and 16.66 Hz and steady-state in shot 73701.

Image of FIG. 7.
FIG. 7.

Radial profiles of (black) and [red (grey in print)] of at 6.25 Hz (circles) and 12.50 Hz (squares) in shot 73700 (compensated case). Phase values are not shown for second harmonic at locations where amplitudes are below noise level.

Image of FIG. 8.
FIG. 8.

Radial profiles of and at 6.25 Hz in shot 66128 (noncompensated) for TRANSP calculated: (a) total torque density (black full line: , red dashed line: ); (b) ion power density (black full line: , red dashed line: ) and electron power density (gray dashed-dotted line: , green dashed line: ).

Image of FIG. 9.
FIG. 9.

Radial profiles of and of TRANSP calculated torque density at 8.33 and 16.66 Hz in shot 73701 (noncompensated), distinguishing collisional and components.

Image of FIG. 10.
FIG. 10.

Radial profiles of and of ASCOT calculated torque density at 8.33 and 16.66 Hz in shot 73701 (noncompensated), distinguishing collisional and components.

Image of FIG. 11.
FIG. 11.

Radial profiles of steady-state torque density in shot 73701 (noncompensated), distinguishing collisional and components, calculated by (a) TRANSP and (b) ASCOT.

Image of FIG. 12.
FIG. 12.

Radial profiles of and of TRANSP calculated torque density at 6.25 and 12.5 Hz in shot 73700 (compensated), distinguishing collisional and components.

Image of FIG. 13.
FIG. 13.

Radial profiles of and of ASCOT calculated torque at 6.25 and 12.5 Hz in shot 73700 (compensated), distinguishing and collisional beam components.

Image of FIG. 14.
FIG. 14.

Radial profiles of and of ASCOT calculated torque at 6.25 and 12.5 Hz in shot 73700 (compensated), distinguishing tangential and perpendicular beam components.

Image of FIG. 15.
FIG. 15.

Radial profiles of and of TRANSP calculated torque at 8.33 Hz in shot 73701 with (a) varying between 0.8 and 1.2 of experimental value; (b) varying between 0.8 and 1.2 of experimental value; and (c) varying between 1.9 and 1. Red full lines are of torque, blue dashed lines are of collisional torque, violet dashed-dotted lines are of torque, and green dotted lines are of collisional torque. The arrows indicate the relevant changes due to parameter variation.

Image of FIG. 16.
FIG. 16.

Radial profiles of , , and used in the simulations of shot 66128 discussed in the text.

Image of FIG. 17.
FIG. 17.

Radial profiles of experimental (dots) and simulated (lines) (black squares) and (red circles) of in shot 66128 using (a) and ; (c) and as shown in Fig. 16 ; (d) a profile increasing with radius (Fig. 16 ) and as shown in Fig. 16 . In (b) the radial profiles of experimental and simulated angular rotation using the three different transport options are shown.

Image of FIG. 18.
FIG. 18.

Radial profiles of experimental (dots) and simulated (lines) (black squares) and (red circles) of at two harmonics of the modulation frequency and steady-state in shot 73701. The simulation derives (by best-fitting the data) the and profiles, as shown in Fig. 19 .

Image of FIG. 19.
FIG. 19.

Radial profiles of , , , and from the empirical simulation of shot 73701.

Image of FIG. 20.
FIG. 20.

Time traces of at different radii as calculated for shot 66128 using the CGM model with typical values of ion threshold and stiffness derived from previous ion heat transport studies.

Image of FIG. 21.
FIG. 21.

Radial profiles in shot 66128 of experimental (dots) and simulated (lines) and of (a) using from the CGM model; (b) using and and from the CGM model; and (c) using the profile increasing with radius (Fig. 16 ) and as shown in Fig. 16 and from the CGM model.

Image of FIG. 22.
FIG. 22.

Radial profiles of experimental (dots) and simulated (lines) (black squares) and (red circles) of at two harmonics of the modulation frequency and steady-state in shot 73700 (compensated case). The simulation derives (by best-fitting the data) the and profiles shown in Fig. 23 .

Image of FIG. 23.
FIG. 23.

Radial profiles of , , , and from the empirical simulation of shot 73700.

Image of FIG. 24.
FIG. 24.

Comparison between experiment and linear gyrokinetic simulations using GKW of the radial profile of and for shot 66128.

Image of FIG. 25.
FIG. 25.

Comparison between experiment and linear gyrokinetic simulations using GKW of the radial profile of and for shot 73701.

Image of FIG. 26.
FIG. 26.

Radial profiles in shot 66128 of experimental (dots with line) and simulated (lines only) (a) time-averaged steady-state ; (b) and of ; and (c) time-averaged steady-state and . The simulations are carried out using the Weiland model with , , and predicted and fixed to the experimental profile.

Image of FIG. 27.
FIG. 27.

Radial profiles of turbulent (diagonal and effective), (diagonal and effective), and momentum for the Weiland model simulation of shot 66128 shown in Fig. 25 , compared with profiles of effective , diagonal , and obtained by best-fitting experimental data.

Image of FIG. 28.
FIG. 28.

Comparison of radial profiles of Prandtl and pinch numbers from Weiland simulation and experiment for shot 66128.

Image of FIG. 29.
FIG. 29.

Radial profiles of experimental (dots) and simulated (lines) time-averaged (c) and its (black squares) and (red circles) at first (a) and second (b) harmonics in shot 73701 using the Weiland model with , , and predicted and fixed to the experimental profile.

Image of FIG. 30.
FIG. 30.

Radial profiles of turbulent (diagonal and effective), (diagonal and effective), and momentum for the Weiland model simulation of shot 73701 shown in Fig. 29 , compared with profiles of effective , diagonal , and obtained by best-fitting experimental data.

Image of FIG. 31.
FIG. 31.

Comparison of radial profiles of Prandtl and pinch numbers from Weiland simulation and experiment for shot 73701.

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/content/aip/journal/pop/17/9/10.1063/1.3480640
2010-09-28
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Perturbative studies of toroidal momentum transport using neutral beam injection modulation in the Joint European Torus: Experimental results, analysis methodology, and first principles modeling
http://aip.metastore.ingenta.com/content/aip/journal/pop/17/9/10.1063/1.3480640
10.1063/1.3480640
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