July 20, 2021
This study experimentally examines the sensitivity of laboratory plasma influenced by a feedback loop to applied external force, with the objective of gaining insight into chaos control in plasma. The ionization waves in laboratory plasma are adopted as the medium of a typical nonlinear system.
In the case of a system without the influence of feedback (defined as system A), the orbit of the chaotic system changes to a periodic one as the intensity of the applied external force increases. In the case of a system with the influence of feedback (defined as system B), the chaotic orbit changes to a periodic one by the application of external force with lower intensity (approximately two-thirds) compared to system A. This reveals that the feedback loop enhances the response of the system to external forces.
Progress of Theoretical and Experimental Physics (Oxford Univ. Press on behalf of JPS)
Dr. Takao Fukuyama & Masahiro Omoto (Physics Laboratory, Nagasaki University)