Spatial emission distribution of a pulsed radiofrequency glow discharge: Influence of the pulse frequency

Plasma diagnostic and microstructural study of WCN coatings growth by pulsed vacuum arc discharge

“…In this work, the phase transformation process that occurred depended on the number of pulses. [48,49] The combination of both pulsed and afterglow processes could result in an increase in reactions as ionization and excitation; then, an increase in the plasma species excited at a given transition level (those with higher probability) involves a greater intensity of the spectral lines. This would suggest that no film was produced.…”

Atomic Spectroscopy

“…The latter suggests that it is possible to detect ionic emission at distances far away from the negative glow, in regions where usually the sampler cone is placed in GDMS. 177 Efimova et al also investigated the effect of pulse duration and duty cycle on the electrical characteristics of a microsecondpulsed GD, and the optimum parameters were reported. 178 A comparison between dc and rf modes was also made, and strong similarities between both modes were observed when using the effective voltage in the rf mode as an equivalent to the dc voltage.…”

“…It was therefore concluded that the prepeak emission can be used as analytical signals to increase the linearity of the calibration curves for resonant lines subject to self-absorption at high analyte concentrations . In ref , the same group performed side-on measurements of the emitted radiation of a pulsed rf GD and investigated again the effect of pulse frequency. It appeared that the excitation of Ar atoms, Ar ions, and Cu atoms was favored at different frequencies, and for the Cu atoms also a strong dependence on the upper energy level was observed.…”

“…Moreover, the spatial distribution of Ar and Cu emission seemed to differ from each other: the Ar atom emission extends longer in the plasma than the Cu atom emission, and the ions have their maximum emission close to the anode. The latter suggests that it is possible to detect ionic emission at distances far away from the negative glow, in regions where usually the sampler cone is placed in GDMS …”

Compressed sensing spectral imaging for plasma optical emission spectroscopy

“…In the case of plasma optical emission spectroscopy (OES), spectral imaging plays a critical role in application development, for example in the case of glow discharge surface elemental mapping 1,2 or inductively coupled plasma matrix-effect agging. 3,4 In addition, spectral imaging has become essential in plasma fundamental studies for glow discharge, 5,6 inductively coupled plasma, [7][8][9] dielectric barrier discharges, 10,11 laser induced breakdown plasmas, 12,13 etc., to better understand the underlying plasma mechanisms.…”