# STRAHL¶

Contacts: Brian Grierson, Garud Snoep, Orso Meneghini

## Short Description¶

Runs the STRAHL code, displays output, and compares runs

## Keywords¶

Impurity transport, charged states, radiation, emission, LBO, Laser Blow Off, minimization

## Long Description¶

STRAHL is a code to calculate the radial transport and the emission of impurities in the plasma bulk. The code solves the radial continuity equation for each ionisation stage of the impurity in 1-D geometry. For the transport an ansatz of anomalous diffusivities and radial drift velocities is used; a full neoclassical treatment of impurity transport can be switched on if desired. The model focuses on the impurity transport and radiation, while the parameters of the background plasma are taken from the experiment.

## Typical workflows¶

STRAHL is used either for predicting impurity transport and the evolution of the impurity density, or post-diction and nonlinear least-squares minimization using LMFIT to infer the transport from an experiment that has impurity density or emission measurements.

Device agnostic

## External resources¶

• Ralph Dux STRAHL User Manual IPP 10/30 September, 2006 <http://pubman.mpdl.mpg.de/pubman/item/escidoc:2143869/component/escidoc:2143868/IPP_10_30.pdf>

• Odstrcil, T., et al. Physics of Plasmas 27.8 (2020): 082503.<https://doi.org/10.1063/5.0010725>

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## Contributors¶

List of contributors sorted by number of lines authored:

16963 Tomas Odstrcil
6337 Francesco Sciortino
763 Brian Grierson
506 Brian Victor
480 Orso Meneghini
20 Fusion Bot
17 Sterling Smith
5 Tim Slendebroek
4 David Eldon