Spatial thermal dose delivery in atmospheric pressure plasma jets. (25th February 2019)

• Record Type: Journal Article
• Authors: Gidon, Dogan; Graves, David B; Mesbah, Ali
• Is Part Of: Plasma sources science & technology. Volume 28:Number 2(2019:Apr.)
• Publication Date: 2019-02-25
• Subjects: atmospheric pressure plasma jets -- dose delivery -- feedback control; Plasma (Ionized gases) -- Periodicals; 530.44
• DOI: 10.1088/1361-6595/aafff6
• Languages: English
• ISSNs: 0963-0252

Abstract

Abstract: Atmospheric pressure plasma jets (APPJs) are increasingly used in plasma medicine and materials processing applications. Reproducible and effective operation of APPJs requires regulating the cumulative effects of plasma on a target substrate in the face of variabilities and exogenous disturbances. This article investigates spatial delivery of thermal effects—thermal dose—of plasma using a kHz-excited APPJ in helium translated over a dielectric substrate. A dose metric is presented for quantifying the cumulative, nonlinear thermal effects of plasma along the translation trajectory of the APPJ. An optimization-based feedback control strategy is proposed for real-time regulation of thermal dose delivery using spatial measurements of substrate temperature. Experimental investigation reveals that feedback control is crucial for achieving spatially uniform dose delivery.