Plasmas generated by ultra-violet light rather than electron impact

Franklin, R. N.; Allen, J. E.; Thomas, D. M.; Benilov, M. S.

Publication

Plasmas generated by ultra-violet light rather than electron impact

2013-12-02Journal article

dc.contributor.author	Franklin, R. N.
dc.contributor.author	Allen, J. E.
dc.contributor.author	Thomas, D. M.
dc.contributor.author	Benilov, M. S.
dc.date.accessioned	2022-09-01T13:35:45Z
dc.date.available	2022-09-01T13:35:45Z
dc.date.issued	2013-12-02
dc.description.abstract	We analyze, in both plane and cylindrical geometries, a collisionless plasma consisting of an inner region where generation occurs by UV illumination, and an un-illuminated outer region with no generation. Ions generated in the inner region flow outwards through the outer region and into a wall. We solve for this system's steady state, first in the quasi-neutral regime (where the Debye length ${\lambda}_D$ vanishes and analytic solutions exist) and then in the general case, which we solve numerically. In the general case a double layer forms where the illuminated and un-illuminated regions meet, and an approximately quasi-neutral plasma connects the double layer to the wall sheath; in plane geometry the ions coast through the quasi-neutral section at slightly more than the Bohm speed $c_s$. The system, although simple, therefore has two novel features: a double layer that does not require counter-streaming ions and electrons, and a quasi-neutral plasma where ions travel in straight lines with at least the Bohm speed. We close with a pr\'{e}cis of our asymptotic solutions of this system, and suggest how our theoretical conclusions might be extended and tested in the laboratory.	pt_PT
dc.description.version	info:eu-repo/semantics/publishedVersion	pt_PT
dc.identifier.citation	Franklin, R. N., Allen, J. E., Thomas, D. M., & Benilov, M. S. (2013). Plasmas generated by ultra-violet light rather than electron impact. Physics of Plasmas, 20(12), 123508. DOI: 10.1063/1.4848715	pt_PT
dc.identifier.doi	10.1063/1.4848715	pt_PT
dc.identifier.uri	http://hdl.handle.net/10400.13/4546
dc.language.iso	eng	pt_PT
dc.peerreviewed	yes	pt_PT
dc.publisher	American Institute of Physics	pt_PT
dc.relation	Modelling, understanding, and controlling self-organization phenomena in plasma-electrode interaction in gas discharges: from first principles to applications
dc.relation.publisherversion	https://aip.scitation.org/doi/full/10.1063/1.4848715	pt_PT
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/	pt_PT
dc.subject	Plasmas	pt_PT
dc.subject	Ultra-violet light	pt_PT
dc.subject	Electron impact	pt_PT
dc.subject	.	pt_PT
dc.subject	Faculdade de Ciências Exatas e da Engenharia	pt_PT
dc.title	Plasmas generated by ultra-violet light rather than electron impact	pt_PT
dc.type	journal article
dspace.entity.type	Publication
oaire.awardTitle	Modelling, understanding, and controlling self-organization phenomena in plasma-electrode interaction in gas discharges: from first principles to applications
oaire.awardURI	info:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FFIS-PLA%2F2708%2F2012/PT
oaire.citation.issue	12	pt_PT
oaire.citation.startPage	123508	pt_PT
oaire.citation.title	Physics of Plasmas	pt_PT
oaire.citation.volume	20	pt_PT
oaire.fundingStream	3599-PPCDT
person.familyName	Benilov
person.givenName	Mikhail
person.identifier.ciencia-id	0F14-A79A-97C1
person.identifier.orcid	0000-0001-9059-1948
person.identifier.rid	K-4443-2015
person.identifier.scopus-author-id	7005138676
project.funder.identifier	http://doi.org/10.13039/501100001871
project.funder.name	Fundação para a Ciência e a Tecnologia
rcaap.rights	openAccess	pt_PT
rcaap.type	article	pt_PT
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