# Drift mode calculations for the Large Helical Device

## Abstract

A fully kinetic assessment of the stability properties of toroidal drift modes has been obtained for a case for the Large Helical Device (LHD) [A.Iiyoshi, et al., Plasma Physics and Controlled Nuclear Fusion Research, 1998, Nucl.Fusion 39, 1245 (1999)]. This calculation retains the important effects in the linearized gyrokinetic equation, using the lowest-order ''ballooning representation'' for high toroidal mode number instabilities in the electrostatic limit. Results for toroidal drift waves destabilized by trapped particle dynamics and ion temperature gradients are presented, using three-dimensional magnetohydrodynamics equilibria reconstructed from experimental measurements. The effects of helically-trapped particles and helical curvature are investigated.

- Authors:

- Publication Date:

- Research Org.:
- Princeton Plasma Physics Laboratory, Princeton, NJ (US)

- Sponsoring Org.:
- USDOE Office of Energy Research (ER) (US)

- OSTI Identifier:
- 756594

- Report Number(s):
- PPPL-3451

TRN: US0003100

- DOE Contract Number:
- AC02-76CH03073

- Resource Type:
- Technical Report

- Resource Relation:
- Other Information: PBD: 8 Jun 2000

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; LHD DEVICE; DRIFT INSTABILITY; KINETIC EQUATIONS; PLASMA DRIFT; PLASMA WAVES; PLASMA SIMULATION

### Citation Formats

```
G. Rewoldt, L.-P. Ku, W.M. Tang, H. Sugama, N. Nakajima, K.Y. Watanabe, S. Murakami, H. Yamada, and W.A. Cooper.
```*Drift mode calculations for the Large Helical Device*. United States: N. p., 2000.
Web. doi:10.2172/756594.

```
G. Rewoldt, L.-P. Ku, W.M. Tang, H. Sugama, N. Nakajima, K.Y. Watanabe, S. Murakami, H. Yamada, & W.A. Cooper.
```*Drift mode calculations for the Large Helical Device*. United States. doi:10.2172/756594.

```
G. Rewoldt, L.-P. Ku, W.M. Tang, H. Sugama, N. Nakajima, K.Y. Watanabe, S. Murakami, H. Yamada, and W.A. Cooper. Thu .
"Drift mode calculations for the Large Helical Device". United States. doi:10.2172/756594. https://www.osti.gov/servlets/purl/756594.
```

```
@article{osti_756594,
```

title = {Drift mode calculations for the Large Helical Device},

author = {G. Rewoldt and L.-P. Ku and W.M. Tang and H. Sugama and N. Nakajima and K.Y. Watanabe and S. Murakami and H. Yamada and W.A. Cooper},

abstractNote = {A fully kinetic assessment of the stability properties of toroidal drift modes has been obtained for a case for the Large Helical Device (LHD) [A.Iiyoshi, et al., Plasma Physics and Controlled Nuclear Fusion Research, 1998, Nucl.Fusion 39, 1245 (1999)]. This calculation retains the important effects in the linearized gyrokinetic equation, using the lowest-order ''ballooning representation'' for high toroidal mode number instabilities in the electrostatic limit. Results for toroidal drift waves destabilized by trapped particle dynamics and ion temperature gradients are presented, using three-dimensional magnetohydrodynamics equilibria reconstructed from experimental measurements. The effects of helically-trapped particles and helical curvature are investigated.},

doi = {10.2172/756594},

journal = {},

number = ,

volume = ,

place = {United States},

year = {2000},

month = {6}

}