E-H mode transition of a high-power inductively coupled plasma torch at atmospheric pressure with a metallic confinement tube. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Plasma Sources Science and Technology Année : 2012

E-H mode transition of a high-power inductively coupled plasma torch at atmospheric pressure with a metallic confinement tube.

Résumé

Inductively coupled plasma torches need high ignition voltages for the E-H mode transition and are therefore difficult to operate. In order to reduce the ignition voltage of an RF plasma torch with a metallic confinement tube the E-H mode transition was studied. A Tesla coil was used to create a spark discharge and the E-H mode transition of the plasma was then filmed using a high-speed camera. The electrical potential of the metallic confinement tube was measured using a high-voltage probe. It was found that an arc between the grounded injector and the metallic confinement tube is maintained by the electric field (E-mode). The transition to H-mode occurred at high magnetic fields when the arc formed a loop. The ignition voltage could be reduced by connecting the metallic confinement tube with a capacitor to the RF generator.

Domaines

Matériaux

Dates et versions

hal-00747592 , version 1 (31-10-2012)

Identifiants

Citer

J. Altenberend, G. Chichignoud, Y. Delannoy. E-H mode transition of a high-power inductively coupled plasma torch at atmospheric pressure with a metallic confinement tube.. Plasma Sources Science and Technology, 2012, 21 (4), ⟨10.1088/0963-0252/21/4/045011⟩. ⟨hal-00747592⟩
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