Hi, I would like to create an electric or magnetic pulses in an open ended cone, sphere or a tube. The pulse would have to be generated in such a way so that it is not actually connected with the container in any way (ie. it can't be a device in the center of the container which generates the pulse AND is also connected to it), and the pulse has to happen within the container. The pulses have to be as strong as possible. Additional constraint is that it has to be able to operate within vacuum or near vacuum. How would I go about this?