I'm making a ball cyclotron (https://rimstar.org/science_electronics_projects/ball_cyclotron_electrostatic_accelerator.htm) for a school project. To generate enough voltage, I'm using a Van der Graaf-generator. The problem is that all the voltage, which I can measure, suddenly dissapears when I connect the generator with the alumium tape.
How is this possible and how can I solve this?
The Attempt at a Solution
My tutors think that the charge dissipates into the air.