# Reduced Fast Ion Transport Model For The Tokamak Transport Code TRANSP

## Abstract

Fast ion transport models presently implemented in the tokamak transport code TRANSP [R. J. Hawryluk, in Physics of Plasmas Close to Thermonuclear Conditions, CEC Brussels, 1 , 19 (1980)] are not capturing important aspects of the physics associated with resonant transport caused by instabilities such as Toroidal Alfv en Eigenmodes (TAEs). This work describes the implementation of a fast ion transport model consistent with the basic mechanisms of resonant mode-particle interaction. The model is formulated in terms of a probability distribution function for the particle's steps in phase space, which is consistent with the MonteCarlo approach used in TRANSP. The proposed model is based on the analysis of fast ion response to TAE modes through the ORBIT code [R. B. White et al., Phys. Fluids 27 , 2455 (1984)], but it can be generalized to higher frequency modes (e.g. Compressional and Global Alfv en Eigenmodes) and to other numerical codes or theories.

- Authors:

- Publication Date:

- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

- Sponsoring Org.:
- USDOE Office of Science (SC)

- OSTI Identifier:
- 1128924

- Report Number(s):
- PPPL-5002

- DOE Contract Number:
- DE-ACO2-09CH11466

- Resource Type:
- Technical Report

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Computer Simulation. Tokamaks, Transport Phenomena

### Citation Formats

```
Podesta,, Mario, Gorelenkova, Marina, and White, Roscoe.
```*Reduced Fast Ion Transport Model For The Tokamak Transport Code TRANSP*. United States: N. p., 2014.
Web. doi:10.2172/1128924.

```
Podesta,, Mario, Gorelenkova, Marina, & White, Roscoe.
```*Reduced Fast Ion Transport Model For The Tokamak Transport Code TRANSP*. United States. doi:10.2172/1128924.

```
Podesta,, Mario, Gorelenkova, Marina, and White, Roscoe. Fri .
"Reduced Fast Ion Transport Model For The Tokamak Transport Code TRANSP". United States. doi:10.2172/1128924. https://www.osti.gov/servlets/purl/1128924.
```

```
@article{osti_1128924,
```

title = {Reduced Fast Ion Transport Model For The Tokamak Transport Code TRANSP},

author = {Podesta,, Mario and Gorelenkova, Marina and White, Roscoe},

abstractNote = {Fast ion transport models presently implemented in the tokamak transport code TRANSP [R. J. Hawryluk, in Physics of Plasmas Close to Thermonuclear Conditions, CEC Brussels, 1 , 19 (1980)] are not capturing important aspects of the physics associated with resonant transport caused by instabilities such as Toroidal Alfv en Eigenmodes (TAEs). This work describes the implementation of a fast ion transport model consistent with the basic mechanisms of resonant mode-particle interaction. The model is formulated in terms of a probability distribution function for the particle's steps in phase space, which is consistent with the MonteCarlo approach used in TRANSP. The proposed model is based on the analysis of fast ion response to TAE modes through the ORBIT code [R. B. White et al., Phys. Fluids 27 , 2455 (1984)], but it can be generalized to higher frequency modes (e.g. Compressional and Global Alfv en Eigenmodes) and to other numerical codes or theories.},

doi = {10.2172/1128924},

journal = {},

number = ,

volume = ,

place = {United States},

year = {Fri Feb 28 00:00:00 EST 2014},

month = {Fri Feb 28 00:00:00 EST 2014}

}