Speaker
Dr
Ilan Be'ery
(Rafael Plasma Lab)
Description
Active feedback can stabilize the violent flute instability and possibly make mirror traps candidates for fusion machines. A fast feedback with optical sensors and electrical actuators was implemented in a table-top mirror machine and used to study several aspects of feedback stabilization. For a cold, dense plasma the feedback reduces dramatically the flute amplitude of the first two mode. For higher temperature plasma, a significant increase of plasma density due to feedback stabilization is demonstrated. The effect of changing feedback gain and phase has some interesting feature such as asymmetry with respect to positive and negative phase shifts and non-monotonic dependence of flute amplitude on feedback gain. These effects are explained using simplified analytic model of the flute and feedback.
Primary author
Dr
Ilan Be'ery
(Rafael Plasma Lab)
Co-author
Mr
omri seemann
(technion)
