The article previously posted concerns design of a reactor for inherent stability. What you are thinking about is called active control. Here is a paper investi

The article previously posted concerns design of a reactor for inherent stability. What you are thinking about is called active control. Here is a paper investigating such control of a fusion torus: http://scitation.aip.org/content/aip/journal/pop/21/8/10.1063/1.4893418 http://scitation.aip.org/content/aip/journal/pop/21/8/10.106...