Eur. Phys. J. Appl. Phys.
Volume 71, Number 2, August 2015
The 14th International Symposium on High Pressure Low Temperature Plasma Chemistry (HAKONE XIV)
|Number of page(s)||7|
|Section||Plasma, Discharges and Processes|
|Published online||15 July 2015|
On the fundamental relation of laser schlieren deflectometry for temperature measurements in filamentary plasmas*
Leibniz Institute for Plasma Science and Technology, Felix-Hausdorff-Str. 2, 17489, Greifswald, Germany
2 Department of Physical Electronics, Faculty of Science, Masaryk University, Kotláĭská 2, 61137, Brno, Czech Republic
a e-mail: firstname.lastname@example.org
Revised: 18 February 2015
Accepted: 26 February 2015
Published online: 15 July 2015
Recently, laser schlieren deflectometry (LSD) had been successfully employed as a temperature measurement method to reveal the heat convection generated by micro filaments of a self-organized non-thermal atmospheric plasma jet. Based on the theory of the temperature measurements using LSD, in this work, three approaches for an application of the method are introduced: (i) a hyperbolic-like model of refractive index is applied which allows an analytical theory for the evaluation of the deflection angle to be developed, (ii) a Gaussian shape model for the filament temperature is implemented which is analyzed numerically and (iii) an experimental calibration of the laser deflection with a gas mixture of helium and argon is performed. Thus, these approaches demonstrate that a universal relation between the relative maximum temperature of the filament core (T1/T0) and a the maximum deflection angle δ1 of the laser beam can be written as T1/T0=(1 − δ1/δ0)−1, where δ0 is a parameter that is defined by the configuration of the experiment and by the assumed model for the shape of the temperature profile.
© The Author(s) 2015
This article is distributed under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0 which permits unrestricted use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.