1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Improved model for transport driven by drift modes in tokamaks
Rent:
Rent this article for
USD
10.1063/1.2829762
/content/aip/journal/pop/15/1/10.1063/1.2829762
http://aip.metastore.ingenta.com/content/aip/journal/pop/15/1/10.1063/1.2829762

Figures

Image of FIG. 1.
FIG. 1.

Ion thermal diffusivity is shown as a function of normalized ion temperature gradient for the Weiland14 model (solid line) and for the Weiland19 model (dashed line) for the plasma parameters listed in Table I. For these parameters, the eigenfunctions for both models are in the strong ballooning limit.

Image of FIG. 2.
FIG. 2.

Ion thermal diffusivity is shown as a function of collisionality for the Weiland14 model (solid line) and for the Weiland19 model (dashed line) at fixed temperature gradients . The value of is varied while , , , and are held constant at the values used for the baseline case. These constants and other parameters are listed in Table I. The thermal diffusivity is divided by to remove the dependence introduced by in the gyro-Bohm normalization factor.

Image of FIG. 3.
FIG. 3.

Ion thermal diffusivity is shown as a function of magnetic shear for the Weiland14 model (solid line) and for the Weiland19 model (dashed line) at fixed temperature gradients . Magnetic shear is varied from to while , , are held constant. These constants and other parameters are given in Table I.

Image of FIG. 4.
FIG. 4.

Ion thermal diffusivity is shown as a function of elongation for the Weiland14 model (solid line) and for the Weiland19 model (dashed line). In addition, for the Weiland19 model, the largest ion (ITG) mode growth rate and the largest electron (MHD) mode growth rate , normalized by , are plotted as a function of . It is found that for , the MHD mode growth rate is dominant. The scans were carried out at fixed temperature gradients , , and . Other dimensionless parameters are held constant at the baseline values given in Table I.

Image of FIG. 5.
FIG. 5.

Ion thermal diffusivity is shown as a function of plasma for the Weiland14 model (solid line) and for the Weiland19 model (dashed line) at fixed temperature gradients . Plasma is varied while , , are held constant at the values given in Table I.

Image of FIG. 6.
FIG. 6.

Ion thermal diffusivity is shown as a function of magnetic shear for . The curve corresponding to the Weiland14 model is represented with a solid line. There are four curves for the Weiland19 model, each one corresponding to a different value of elongation. For the results shown in this figure, the plasma is increased from the base case value of to . The plasma density, temperature, and magnetic field are changed from the values given in Table I (, , and ) so that dimensionless parameters and are held constant at the baseline values. These constants and the other parameters are given in Table I.

Image of FIG. 7.
FIG. 7.

Ion thermal diffusivity is shown as a function of magnetic shear . The results are for the same conditions used for the plots in Fig. 6 except that rather than . The curve corresponding to the Weiland14 model is represented with a solid line. There are four curves for the Weiland19 model, each one corresponding to a different value of elongation.

Image of FIG. 8.
FIG. 8.

Ion thermal diffusivity is shown as a function of for the Weiland14 model (solid lines) and for the Weiland19 model (nonsolid lines) at fixed temperature gradients . The computations are carried out using weak elongation and three different magnetic shear values . Plasma is varied while and are held constant at the baselines values. These constants and other parameters are given in Table I.

Image of FIG. 9.
FIG. 9.

Ion thermal diffusivity is shown as a function of for the Weiland14 model (solid line) and for the Weiland19 model (dashed lines) for weak magnetic shear . The computations are carried out at four different elongation values with fixed temperature gradients . Plasma is varied while and are held constant at the values given in Table I.

Image of FIG. 10.
FIG. 10.

Ion thermal diffusivity is shown as a function of for the Weiland14 model (solid line) and for the Weiland19 model (nonsolid lines) for strong magnetic shear . The computations are carried out at four different elongation values with fixed temperature gradients . Plasma is varied while and are held constant at the values given in Table I.

Tables

Generic image for table
Table I.

Parameters and nomenclature used.

Generic image for table
Table II.

Differences in the implementation of physics effects.

Loading

Article metrics loading...

/content/aip/journal/pop/15/1/10.1063/1.2829762
2008-01-16
2014-04-25
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Improved model for transport driven by drift modes in tokamaks
http://aip.metastore.ingenta.com/content/aip/journal/pop/15/1/10.1063/1.2829762
10.1063/1.2829762
SEARCH_EXPAND_ITEM