| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Using a Mach–Zehnder interferometer to deduce nitrogen density mapping |
| F. Boudaoud, M. Lemerini |
| Department of Physics, University Abou Bekr Belkaid, Tlemcen, Algeria |
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Abstract This work presents an optical method using the Mach–Zehnder interferometer. We especially diagnose a pure nitrogen gas subjected to a point to plane corona discharge, and visualize the density spatial map. The interelectrode distance equals 6 mm and the variation of the optical path has been measured at different pressures: 220 Torr, 400 Torr, and 760 Torr. The interferograms are recorded with a CCD camera, and the numerical analysis of these interferograms is assured by the inverse Abel transformation. The nitrogen density is extracted through the Gladstone–Dale relation. The obtained results are in close agreement with values available in the literature.
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Received: 05 December 2014
Revised: 16 February 2015
Accepted manuscript online:
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PACS:
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52.70.-m
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(Plasma diagnostic techniques and instrumentation)
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52.38.-r
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(Laser-plasma interactions)
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42.40.Kw
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(Holographic interferometry; other holographic techniques)
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42.30.-d
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(Imaging and optical processing)
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Corresponding Authors:
F. Boudaoud
E-mail: fethiaboudaoud@yahoo.fr
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Cite this article:
F. Boudaoud, M. Lemerini Using a Mach–Zehnder interferometer to deduce nitrogen density mapping 2015 Chin. Phys. B 24 075205
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