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

8 Citations (Scopus)

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.

LanguageEnglish
Article number035002
Pages1-14
JournalPlasma Sources Science and Technology
Volume26
Issue number3
DOIs
StatePublished - 6 Feb 2017

Fingerprint

charge transfer
point impact
ionization
electric fields
gas flow
electric potential
plasma waves
crystal surfaces
plasma jets
travel
electro-optics
birefringence
emerging
atmospheric pressure
propagation
gases

Keywords

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

Cite this

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title = "Charge transfer to a dielectric target by guided ionization waves using electric field measurements",
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.",
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Charge transfer to a dielectric target by guided ionization waves using electric field measurements. / Slikboer, E.T.; Garcia-Caurel, E.; Guaitella, O.; Sobota, A.

In: Plasma Sources Science and Technology, Vol. 26, No. 3, 035002, 06.02.2017, p. 1-14.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Garcia-Caurel,E.

AU - Guaitella,O.

AU - Sobota,A.

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N2 - 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.

AB - 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.

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