laser diagnostics on atmospheric pressure plasma .laser diagnostics on atmospheric pressure plasma

Download Laser diagnostics on atmospheric pressure plasma .Laser diagnostics on atmospheric pressure plasma

Post on 07-Oct-2018

224 views

Category:

Documents

1 download

Embed Size (px)

TRANSCRIPT

  • Laser diagnostics on atmospheric pressure plasma jets

    van Gessel, A.F.H.

    DOI:10.6100/IR752356

    Published: 01/01/2013

    Document VersionPublishers PDF, also known as Version of Record (includes final page, issue and volume numbers)

    Please check the document version of this publication:

    A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differencesbetween the submitted version and the official published version of record. People interested in the research are advised to contact theauthor for the final version of the publication, or visit the DOI to the publisher's website. The final author version and the galley proof are versions of the publication after peer review. The final published version features the final layout of the paper including the volume, issue and page numbers.

    Link to publication

    Citation for published version (APA):Gessel, van, A. F. H. (2013). Laser diagnostics on atmospheric pressure plasma jets Eindhoven: TechnischeUniversiteit Eindhoven DOI: 10.6100/IR752356

    General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright ownersand it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.

    Users may download and print one copy of any publication from the public portal for the purpose of private study or research. You may not further distribute the material or use it for any profit-making activity or commercial gain You may freely distribute the URL identifying the publication in the public portal ?

    Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediatelyand investigate your claim.

    Download date: 06. Oct. 2018

    https://doi.org/10.6100/IR752356https://research.tue.nl/en/publications/laser-diagnostics-on-atmospheric-pressure-plasma-jets(a324f1db-385a-4cce-a5d3-ceff8b7b94d5).html

  • Laser diagnostics onatmospheric pressure plasma jets

    PROEFSCHRIFT

    ter verkrijging van de graad van doctor aan deTechnische Universiteit Eindhoven, op gezag van derector magni cus, prof.dr.ir. C.J. van Duijn, voor een

    commissie aangewezen door het College voorPromoties in het openbaar te verdedigenop donderdag mei om . uur

    door

    Abraham Franciscus Hubertus van Gessel

    geboren te Heerlen

  • Dit proefschri is goedgekeurd door de promotoren:

    prof.dr.ir.lic. P.J. Bruggemanenprof.dr.ir. G.M.W. Kroesen

    Laser diagnostics on atmospheric pressure plasma jets / by Abraham Franciscus Hubertusvan Gessel. Eindhoven : Technische Universiteit Eindhoven, Proefschri.

    A catalogue record is available from the Eindhoven University of Technology Library.ISBN: ----NUR: Subject headings: plasma physics / atmospheric pressure plasmas / laser diagnostics /omson scattering / Raman scattering / Rayleigh scattering / laser induced uorescence/ two-photon absorption laser induced uorescence / optical emission spectroscopy

    Typeset in Minion Pro and Myriad Pro.Printed by Eindhoven University of Technology Printservice, Eindhoven.

    Copyright A.F.H. van Gessel. All rights reserved.

  • Contents

    Introduction . Atmospheric pressure plasmas . . . . . . . . . . . . . . . . . . . . . . . .

    .. Applications of atmospheric pressure plasma jets . . . . . . . . . .. Research goals . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Types of APPJs used in this research . . . . . . . . . . . . . . . .

    . Plasma diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Optical emission spectroscopy . . . . . . . . . . . . . . . . . . . .. Laser scattering . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Laser induced uorescence . . . . . . . . . . . . . . . . . . . . .

    . esis outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

    Disentangling Rayleigh, Raman andomson scattering . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Laser scattering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

    .. Rayleigh scattering . . . . . . . . . . . . . . . . . . . . . . . . . . .. omson scattering . . . . . . . . . . . . . . . . . . . . . . . . . .. Rotational Raman scattering . . . . . . . . . . . . . . . . . . . .

    . Experimental setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Fitting procedure . . . . . . . . . . . . . . . . . . . . . . . . . . .

    . Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Discussion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

    .. Losses of vibrational ground state molecules . . . . . . . . . . . . .. Te increase at the edge . . . . . . . . . . . . . . . . . . . . . . . . .. Experimental detection limits . . . . . . . . . . . . . . . . . . . .

    . Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

    Temperature tting of partially resolved rotational spectra . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fitting method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

    .. Optical emission spectroscopy . . . . . . . . . . . . . . . . . . . .. Laser induced uorescence . . . . . . . . . . . . . . . . . . . . .

    . Experimental setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Applying the tting method . . . . . . . . . . . . . . . . . . . . . . . . .

    iii

  • Contents

    . Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

    Temperature and NO density measurements on a coaxial microwave jet . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Experimental setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

    .. Plasma source . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. LIF setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. OES setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ermocouple . . . . . . . . . . . . . . . . . . . . . . . . . . . .

    . NO rotational distribution . . . . . . . . . . . . . . . . . . . . . . . . . . .. NO X ground state . . . . . . . . . . . . . . . . . . . . . . . . .. NO A + excited state . . . . . . . . . . . . . . . . . . . . . . . . .. Transitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Rotational distribution . . . . . . . . . . . . . . . . . . . . . . . .

    . Laser induced uorescence . . . . . . . . . . . . . . . . . . . . . . . . . . .. Two-level model . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Rate equation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Absolute calibration . . . . . . . . . . . . . . . . . . . . . . . . . .. Quenching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Linearity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

    . Emission spectroscopy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

    .. NO X rotational temperature . . . . . . . . . . . . . . . . . . . . .. NO A and N C rotational temperatures . . . . . . . . . . . . . . .. ermocouple . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Interpretation of the rotational temperature . . . . . . . . . . . .

    . Absolute NO density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Temperature effects on density . . . . . . . . . . . . . . . . . . .

    . Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

    ermalization of rotational states of NO A . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LIF-RET model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

    .. Rate coefficients . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Simulation results . . . . . . . . . . . . . . . . . . . . . . . . . .

    . Measurements of thermalization time . . . . . . . . . . . . . . . . . . . . .. Experimental setup . . . . . . . . . . . . . . . . . . . . . . . . . .. Time evolution of uorescence spectrum . . . . . . . . . . . . . .. Fitted temperature parameter . . . . . . . . . . . . . . . . . . . . .. ermalization time . . . . . . . . . . . . . . . . . . . . . . . . .

    . Discussion and conclusion . . . . . . . . . . . . . . . . . . . . . . . . . .

    iv

  • Contents

    O TALIF measurements in a coaxial microwave jet . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Experimental setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

    .. Plasma source . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. TALIF system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. omson and Raman scattering system . . . . . . . . . . . . . .

    . Absolute calibration of the TALIF signal . . . . . . . . . . . . . . . . . . .. Xe branching ratios at atmospheric pressure . . . . . . . . . . . . .. Absolute O density . . . . . . . . . . . . . . . . . . . . . . . . . .

    . Results of the microwave jet . . . . . . . . . . . . . . . . . . . . . . . . . .. O, O and electron density . . . . . . . . . . . . . . . . . . . . . . .. Different gas mixtures and different powers . . . . . . . . . . . .

    . Discussion of the plasma chemistry . . . . . . . .

Recommended

View more >