# MHD Stability Calculations of High-Beta Quasi-Axisymmetric Stellarators

## Abstract

The MHD stability of quasi-axisymmetric compact stellarators is investigated. It is shown that bootstrap current driven external kink modes can be stabilized by a combination of edge magnetic shear and appropriate 3D plasma boundary shaping while maintaining good quasi-axisymmetry. The results demonstrate that there exists a new class of stellarators with quasi-axisymmetry, large bootstrap current, high MHD beta limit, and compact size.

- Authors:

- Publication Date:

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

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

- OSTI Identifier:
- 12170

- Report Number(s):
- PPPL-3357

AC02-CHO-3073; TRN: US0102370

- DOE Contract Number:
- AC02-76CH03073

- Resource Type:
- Technical Report

- Resource Relation:
- Other Information: PBD: 1 Sep 1999

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BOOTSTRAP CURRENT; HIGH-BETA PLASMA; MAGNETOHYDRODYNAMICS; STABILITY; STELLARATORS; AXIAL SYMMETRY; KINK INSTABILITY

### Citation Formats

```
C. Kessel, G.Y. Fu, L.P. Ku, M.H. Redi, N. Pomphrey, and et al.
```*MHD Stability Calculations of High-Beta Quasi-Axisymmetric Stellarators*. United States: N. p., 1999.
Web. doi:10.2172/12170.

```
C. Kessel, G.Y. Fu, L.P. Ku, M.H. Redi, N. Pomphrey, & et al.
```*MHD Stability Calculations of High-Beta Quasi-Axisymmetric Stellarators*. United States. doi:10.2172/12170.

```
C. Kessel, G.Y. Fu, L.P. Ku, M.H. Redi, N. Pomphrey, and et al. Wed .
"MHD Stability Calculations of High-Beta Quasi-Axisymmetric Stellarators". United States. doi:10.2172/12170. https://www.osti.gov/servlets/purl/12170.
```

```
@article{osti_12170,
```

title = {MHD Stability Calculations of High-Beta Quasi-Axisymmetric Stellarators},

author = {C. Kessel and G.Y. Fu and L.P. Ku and M.H. Redi and N. Pomphrey and et al},

abstractNote = {The MHD stability of quasi-axisymmetric compact stellarators is investigated. It is shown that bootstrap current driven external kink modes can be stabilized by a combination of edge magnetic shear and appropriate 3D plasma boundary shaping while maintaining good quasi-axisymmetry. The results demonstrate that there exists a new class of stellarators with quasi-axisymmetry, large bootstrap current, high MHD beta limit, and compact size.},

doi = {10.2172/12170},

journal = {},

number = ,

volume = ,

place = {United States},

year = {1999},

month = {9}

}

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