Collectors cone-shaped

A modified active method was used for collect gaseous metals from soil air (Wang et al. 2008). The sampling device consists of a cone-shaped sampler, a special Millipore filter (0.45 jam), a liquid collector, and a battery-operated pump. The liquid collector comprises a high... 

The electrical potential causes the deformation of the fluid drop, and when the applied voltage develops enough force and balances with the fluid surface tension of the polymer solution, the drop is deformed under a cone shape with a semivertical angle of 30°. Beyond this critical value (Rayleigh limit], the electrostatic forces generated by the charge carriers overcome the surface tension and the deformed droplet undergoes a transition zone just before the fiber jet is initiated to the collector screen. By this way, fluid is... 

Regardless, the flat corrector is not adequate for a high-power TWT. The cone-shaped collector as shown in Fig. 6.18(b) has more electron collection area than the flat collector shown in Fig. 6.18(a). Therefore, it reduces collector current density on the collector. This reduces the heating problem of the collector. A larger electron collection area can be obtained by making the collector configuration a curved cone shape, shown in Fig. 6.18(c), or a cylindrical shape, shown in Fig. 6.18(d) to reduce the heating of the collector by electron bombardment. 

Figure 4.9 Different types of collectors used in electrospinning (a) flat plate collector (KIdoaki et al. 2005) (6) rotating drum (Wannatong et al. 2004), mandrel (Mo and Weber 2004), rotating disc (Zussman et al. 2003) (c) rectangular, triangular, or wire cylinder frame (Katta et al. 2004) (d) electrode pair arrangements (Li, D., et al. 2003b) (e) single or multiple ring electrodes (Dalton et al. 2005) (f) mesh electrode (U.S. patent 6,110,590, Aug. 2000) (g) pair of cone-shaped collectors (Bunyan et al. 2006).

In a prototypical electrospinning experiment, a characteristic jet path is created when a fluid polymer solution, supplied to a drop attached to an orifice by surface tension and viscoelastic stresses, is electrified by a sufficiently high electrical potential applied between the drop and a collector placed some distance away. The shape of the drop approaches a cone and an electrically charged jet of fluid emanates from... 

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