大氣介電層電漿放電之二維有序無序結構轉換

Order-Disorder Transition of Filamentary Discharge in Atmospheric Dielectric Barrier Discharge System

劉邦旭(Bang-Tsui Liou)

指導教授 ： 曲宏宇

國立中正大學/理學院/物理學系/碩士(2014年)

摘要

無資料

關鍵字

大氣電漿 ； 放電 ； 電漿 ； 介電層 ； 二維相變

並列摘要

In industries, the dielectric barrier discharge systems are operated at atmospheric
pressure which show the advantages for surface processing and
plasma chemistry. Typically, two electrodes separated by several millimeters
and operated with sinusoidal A.C. voltage with frequency in range of
tens kHz. The dielectric layer between two electrodes can greatly limit the
strength of the discharge current. In filamentary discharge regime, small
discharge channels are formed in the gaseous layer which look like bright filaments.
Despite the filamentary discharge is widely applied to the industrial
products, the discharge mechanism is not clear. In our research, the filamentary
discharge is investigated with different electrode geometries. The gap dependence
of the discharge is briefly discussed. The breakdown mechanism of
single filamentary discharge is investigated in the needle-to-plane electrodes
setup which shows consistent scaling relation with electron avalanche. The
interaction between the filamentary discharges is investigated in the plane-toplane
electrodes setup. The disorder-order transition of the discharge spots
is observed as the increase of the gap distance. It is found that the structural
transition of the filamentary discharges is strongly related to the mutual
Coulomb interaction between the charge piles. Finally, we report the investigation
of the filamentary discharges in the wedged plane-to-plane electrodes
setup. As the gap distance increases, the continuous structural transition of
the discharge pattern is found. We further confirm the discharge process is
dominated by the gap distance.

並列關鍵字

dielectric barrier ； discharge ； lattice ； disorder ； order ； two-dimentional

參考文獻

[1] Yuri P. Raizer. Gas Discharge Physics. Springer, 1991.

[2] B. Eliasson U. Konelschatz and W. Egli. Dielectric-barrier discharges.

[3] Hong-Yu Chu and Bo-Shiun Huang. Gap-dependent transitions of atmospheric

microplasma in open air. Phys. Plasmas, 18:043501, 2011.

spirals and targets. Phys. Rev. Lett., 80:5341, 1998.