Plasma Control

Under atmospheric pressure, characteristics of plasma are prone to abrupt changes with changing system properties such as geometry, surface properties, inlet molecular gas concentration, etc. These abrupt changes can result in the delivery of large amounts of heat and current to a treated surface. Especially in the case of biomedical applications, this raises concerns about safety and reliability of operation. 

Our research on plasma control takes a process-oriented approach to surface treatment by cold atmospheric pressure plasmas (CAPs). We focus on the development of theoretical and experimental tools to tackle the operational variability in CAP devices with advanced online control strategies. This involves the development of control-relevant models of the plasma as well the development and integration of effective sensing and actuation methods for in-situ characterization of the plasma.

To this end we are working with the following research questions:
  • Control-relevant modeling of CAPs
  • In-situ measurement techniques for gas-phase and surface properties
  • Characterization of process disturbances and uncertainties for control
  • Spatially uniform delivery of plasma effects (i.e., Plasma Dose)
  • Development of an open-source control platform for sensor and actuator integration available here