Discharge floating-electrode

Figure 1—9. Floating-electrode dielectric barrier discharge (FE-DBD) with a finger as a second electrode.

Direct Plasma Medicine Floating-Electrode Dielectric Barrier Discharge... 

Figure 12-27. Floating-electrode dielectric barrier discharge one electrode is protected by a dielectric barrier, another electrode is living tissue to be treated.

Fig. 3 (a) A schematic of dielectric barrier discharge (DBD) plasma and an example image of DBD discharge, (b) A schematic of floating electrode DBD (FE-DBD) applied on a human tissue... 

Fridman, G., et al. Floating electrode dielectric barrier discharge plasma in air promoting apoptotic behavior in melanoma skin cancer cell lines. Plasma Chemistry and Plasma Processing 27(2), 163-176 (2007)... 

Figure 13.1 Schematic diagrams of the two configurations of the electrode setup used in the glow discharge polymerization process, (a) A1 substrate was used as powered electrode and (b) A1 substrate was floating in between the two parallel electrodes.

The system pressure dependence of the deposition rate onto the electrode surface in DC, 40-kHz, and 13.56-MHz discharges are shown in Figure 8.8. In order to see the influence of electrical contact, some silicon wafers were electrically insulated from the substrate plate used as the cathode by placing a thin slide cover glass between the silicon wafer and the substrate. The influence of the electrical contact on deposition rate onto the electrode and onto the floating substrate is shown in Figures 8.8-8.10 as a function of system pressure. In the lower part of the figures, the influence of the same factors on the refractive index is shown. The scale of the deposition rate axis is different for each case in order to show the system pressure dependence clearly in each case. 

In a 40-kHz discharge (Fig. 8.10), the deposition onto the surface of the electrode, regardless of electrical conductivity or contact, is significantly different from deposition onto a floating substrate. The cathodic aspect of the electrode is less (one-half of DC discharge), but because of this the overall cathodic aspects of polymerization extend beyond the surface of the electrode yielding cathodic plasma polymer on an electrically insulated substrate placed on the electrode. Thus, the features of cathodic polymerization dominate in the vicinity of the electrode regardless of electrical contact. 

Whilst the influence of impurities and additives on charge or float conditions is common to all types of lead-acid batteries, with VRLA batteries there is the additional concern of self-discharge of the negative by reduction of the oxygen generated at the positive electrode, i.e.,... 

Under normal operating conditions, the battery is fully charged and the float current, /float, should maintain this condition by compensating for self-discharge and secondary reactions. In a VRLA cell, the current distribution at each electrode is At negative electrode... 

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