Thanks a lot for your reply.
So thinking to send them optically is not a good effort since the accelerator produces a lot of x-rays.
After severe calculus the current should go down to 20uA (heeeelp!)
And the ADC is now connected to USB to the PC port.
Sorry for the varying values but they are not all clear,due to intellectual property.
So as far as I understood, you would cover the distance analogically, bring this low currents along the 40mt. path? and then convert them near the PC right?
Thanks alot