Charge transfer to a dielectric target by guided ionization waves using electric field measurements

E.T. Slikboer, E. Garcia-Caurel, O. Guaitella, A. Sobota

Research output: Contribution to journalArticleAcademicpeer-review

16 Citations (Scopus)
17 Downloads (Pure)

Abstract

A kHz-operated atmospheric pressure plasma jet is investigated by measuring charge transferred to a dielectric electro-optic surface (BSO crystal) allowing for the measurement of electric field by exploiting the Pockels effect. The electric field values, distribution of the surface discharge and amount of deposited charge are obtained for various parameters, including gas flow, applied voltage, target distance and the length of the capillary from ground to the end. A newly formed surface discharge emerges at the target when enough charge is deposited at the impact point and electric fields are high enough, i.e. 200 pC and 9 ±2 kV cm-1. The maximum amount of charge transferred by a single ionization wave ('plasma bullet') is 350 ±40 pC. Due to the emerging new surface discharge behind the impact point, the total charge deposited on the surface of the dielectric target can increase up to 950 pC. The shape of the secondary discharge on the target is found to be mainly driven by gas flow, while the applied voltage allows us to utilize longer distances within the boundaries set by this gas mixing. Finally the ionization wave is found to lose charge along its propagation on the inner walls of the capillary. The loss is estimated to be approximately 7.5 pC mm-1 of travel distance inside the capillary.

Original languageEnglish
Article number035002
Pages (from-to)1-14
JournalPlasma Sources Science and Technology
Volume26
Issue number3
DOIs
Publication statusPublished - 6 Feb 2017

Keywords

  • atmospheric pressure plasma jet
  • charge transfer
  • dielectric target
  • electric field
  • guided ionization waves
  • plasma bullets
  • Pockels effect

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  • Activities

    Plasma-Surface Interaction: Pockels-based Mueller Polarimetry for E field measurements

    Ana Sobota (Speaker), , Elmar T. Slikboer (Member), , O Guaitella (Member), & Enric Garcia-Caurel (Member)

    14 Jul 201919 Jul 2019

    Activity: Talk or presentation typesInvited talkScientific

    Electric field measurements in atmospheric pressure non-thermal plasmas: Pockels-based Mueller polarimetry

    Ana Sobota (Speaker), , Elmar T. Slikboer (Member), , O Guaitella (Member), & Enric Garcia-Caurel (Member)

    13 May 201916 May 2019

    Activity: Talk or presentation typesInvited talkScientific

    Electric field on liquid and dielectric surfaces exposed to atmospheric pressure plasma jets

    Ana Sobota (Invited speaker)

    28 Sep 2017

    Activity: Talk or presentation typesInvited talkScientific

    Impacts

    Plasmas for biological, environmental and medical applications

    Ana Sobota (Content manager)

    Impact: Research Topic/Theme (at group level)

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