Investigations of a microwave plasma source operating with air, N₂, CO₂and argon gases

Synthesis of Micro- and Nanomaterials in CO2and CO Dielectric Barrier Discharges

“…The absence of C 2 lines in the CO 2 discharge spectra is quite typical for non‐thermal plasma systems . The Swan band is however, observed in atmospheric CO 2 MW discharges . On the other hand, Kameshima et al reported the emission of C 2 lines in a CO 2 DBD system, and correlated this to the removal of carbon deposits of the preceding CO 2 CH 4 discharge .…”

Super-fast synthesis of ZnO nanowires by microwave air-plasma

“…The plasma emission spectrum composed of nitrogen, oxygen and Zn peaks which were a good proof that a large number of Zn atoms were sputtered out. [22][23][24][25][26] The crystal orientation of the ZnO nanowires was observed by XRD as shown in Fig. 3(b).…”

Plasma airflow jets diagnosis by means of time-resolved tomography

“…The experimental arrangement has been designed to investigate the air plasma jet produced with a Microwave Plasma Torch consisting basically of a wave launcher operating commonly at 2.45 GHz coupled to cylindrical quartz tube of 30 mm inner diameter, the air flow is injected by means of a swirl injector from the bottom tube. In the present experiments the air plasma jet is produced in room ambient air at atmospheric pressure and the plasma temperature is of 5000 K. MPT properties have been detailed in previous contribution [8] and will be not repeated here. The CCD camera has been combined with four ordinary mirrors (20 cm length and 8 cm width) to record simultaneously side-on intensity spatial distributions I(x , θ, z) issued from five co-planar directions perpendicular to z-axis.…”

“…The examination of the plasma jet dynamic can be easily performed by means of high speed imaging measurement techniques. Various processing can be applied to plasma intensity, recorded with a high speed CCD camera for example, to uncover underlying jet dynamic characteristics [5], [6], [7], [8]. Nevertheless, recorded intensity corresponds to the optical emission integrated along the optical path (in first approximation parallel to the camera viewing direction) therefore fine interpretation of plasma jet dynamics taking place locally is limited, and obviously local emission can no more be rebuilt with the classical Abel transform, applicable only to symmetric emission profile.…”