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Söderström, Daniel
Publications (6 of 6) Show all publications
Söderström, D., Baránková, H. & Bárdos, L. (2008). Time evolution of the space-charge sheath in an rf hollow cathode. Journal of Physics, Conference Series, 100(6), 062020
Open this publication in new window or tab >>Time evolution of the space-charge sheath in an rf hollow cathode
2008 (English)In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 100, no 6, p. 062020-Article in journal (Refereed) Published
National Category
Physical Sciences Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-97237 (URN)10.1088/1742-6596/100/6/062020 (DOI)000275655200216 ()
Available from: 2008-05-07 Created: 2008-05-07 Last updated: 2017-12-14Bibliographically approved
Söderström, D., Baránková, H. & Bárdos, L. (2007). On Dimensions of Atmospheric-Pressure Hollow Cathodes. IEEE Transactions on Plasma Science, 35(3), 522-526
Open this publication in new window or tab >>On Dimensions of Atmospheric-Pressure Hollow Cathodes
2007 (English)In: IEEE Transactions on Plasma Science, ISSN 0093-3813, E-ISSN 1939-9375, Vol. 35, no 3, p. 522-526Article in journal (Refereed) Published
Abstract [en]

The hollow cathode is known as a source of high-density plasmas. This property is due to the hollow-cathode effect (HCE), which can be explained by the oscillations of fast electrons between repelling potentials of opposing space-charge sheaths. At atmospheric pressure, one should be able to create an HCE by adjusting the dimension of the hollow cathode. Experiments show that the dimensions could be as large as 500, so that the sheath thickness may be on the order of 100. Theoretical models of the atmospheric-pressure sheaths based on the conventional Child-Langmuir approach give the sheath thicknesses on the order of 10, which contradicts the experiments. We introduce here a new model which takes into account three groups of electrons: slow, fast, and secondary. By adding a group of fast and secondary electrons, we show that the sheath thickness increases as compared with only slow electrons present.

Keywords
Atmospheric pressure, hollow cathode, radio frequency (RF), sheaths
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-97235 (URN)10.1109/TPS.2007.897894 (DOI)000247352900001 ()
Available from: 2008-05-07 Created: 2008-05-07 Last updated: 2017-12-14Bibliographically approved
Söderström, D., Baránková, H. & Bárdos, L. (2007). Space-charge sheaths in atmospheric pressure hollow cathodes. In: : . Paper presented at Proceedings of the 16th Symp. on Applications and Plasma Processing (SAPP XVI). (pp. 261-262).
Open this publication in new window or tab >>Space-charge sheaths in atmospheric pressure hollow cathodes
2007 (English)Conference paper, Published paper (Other academic)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-97236 (URN)
Conference
Proceedings of the 16th Symp. on Applications and Plasma Processing (SAPP XVI).
Available from: 2008-05-07 Created: 2008-05-07 Last updated: 2016-04-11Bibliographically approved
Söderström, D., Barankova, H. & Bardos, L. (2007). Time evolution of the space-charge sheath in an rf hollow cathode. In: : . Paper presented at Int. Vacuum Congress (IVC-17) (pp. paper PSTFO2-Or1).
Open this publication in new window or tab >>Time evolution of the space-charge sheath in an rf hollow cathode
2007 (English)Conference paper, Published paper (Refereed)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-14297 (URN)
Conference
Int. Vacuum Congress (IVC-17)
Available from: 2008-04-25 Created: 2008-04-25 Last updated: 2016-04-11Bibliographically approved
Barankova, H., Bardos, L. & Söderström, D. (2006). Hybrid Atmospheric Plasma in Molecular Gas. In: : . Paper presented at Int. Conf. Metall. Coat.&Thin Films - ICMCTF-06, San Diego, May, Paper G3-6.
Open this publication in new window or tab >>Hybrid Atmospheric Plasma in Molecular Gas
2006 (English)Conference paper, Published paper (Refereed)
National Category
Engineering and Technology
Identifiers
urn:nbn:se:uu:diva-26457 (URN)
Conference
Int. Conf. Metall. Coat.&Thin Films - ICMCTF-06, San Diego, May, Paper G3-6
Available from: 2007-02-16 Created: 2007-02-16 Last updated: 2016-07-12
Barankova, H., Bardos, L. & Söderström, D. (2005). Cold Atmospheric Plasma in Nitrogen and Air Generated by the Hybrid Plasma Source. In: AVS 52nd Int. Meeting, Boston, October-November 2005, Paper PS-WeA3..
Open this publication in new window or tab >>Cold Atmospheric Plasma in Nitrogen and Air Generated by the Hybrid Plasma Source
2005 (English)In: AVS 52nd Int. Meeting, Boston, October-November 2005, Paper PS-WeA3., 2005Conference paper, Published paper (Other scientific)
Identifiers
urn:nbn:se:uu:diva-77001 (URN)
Available from: 2006-03-10 Created: 2006-03-10
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