Stability results obtained with the fully three-dimensional magnetohydrodynamio code BETA, the helically invariant code HERA, and the asymptotic stellarator expansion code STEP agree well For a straight t, = 2, M = 5 stellarator model. This good agreement between the BETA and STEP codes persists as toroidal curvature is introduced. This validation provides justification for confidence in work with these models. DISCLAIMER This report was prepared as an account o( work sponsored by an agency of

more »

... he Waited Stales Government Neither the United Stales Go-ernment nor any agency thereof, nor any or thiir employees, fflaie any warranty, eipress or implied, or assumes any legal liability or responsi bility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that ftc use would not infringe privately owned rights. Refer ence herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not neceswrily constitute or imply its endorsement, recom mendation, or favoring by tie Urited States Government or any agency thereof. The views and opinions of authors eipressed herein do not necessarily state or reflect those of the United Stales Government or any agency thereof.