ion collector. The induced current flows between the suppressor grid and the ion collector until the ions reach the collector and electrical energy is taken out by the external load. In this experiment the positive bias potential Vc is connected to the external circuit as an imaginary load and it is satisfied to be VCIC»ICR1. Here Ic is the collector current which passes through the imaginary load. In this experiment, the PDC which has two collectors as shown in Fig. 2, is used [7]. The first collector is applied low positive voltage V„ and the second one is applied higher voltage Vc so that slow ions are caught by the first collector and fast ions which have high energy are caught by the second one. The ions which are not decelerated enough collide with the ion collectors and the kinetic energy of ions is lost on the collector surface as thermal energy. If there are many collectors, each ion can be caught by each collector at the applied desirable voltage which fits each ion's kinetic energy. So the kinetic energy of the ions is converted effectively to the electric energy because the loss of the thermal energy on the collectors decreases. 3. Experiments of Direct Energy Converter from Laser Energy to Electricity 3.1. Dependence of Energy Conversion Efficiency on Laser Energy In this section, the dependence of the efficiency of t/3 and ?/r?/3mar on the laser
RkJQdWJsaXNoZXIy MTU5NjU0Mg==