hi everyone, i've got a question. say i have two electrode plates placed pretty close together, with two pieces of a ceramic high dielectric constant material.. x7r class ceramics for instance, in between the two plates, with a gap in the middle of these two ceramic inserts, filled with vacuum. like so: | = electrode : = high dielectric constant material. |: :| now, if i ran this electrode on AC, with a much higher than 120HZ source. what would happen to any free electrons in the vacuum? from what i understand about capacitors what would happen is that the electrons in the vacuum would be moved quite quickly across the gap, given enough voltage to normally cause an arc to form. this processes would repeat and the electrons would move across the gap in the opposite direction, and again and again as the AC source continued. there wouldn't be that much absorption of the free electrons since the ceramic has such a high dielectric constant. is this correct, or am i missing something basic that would cause free electrons in the vacuum to move through the dielectrics? similarly, what would happen when air was in the gap, and there was enough voltage to ionize the air? thanks, chris.