U = qV for Mass Spectrometer

[mrbling]

Given: A proton is accelerated up to KE before it exits into a magnetic field and is deflected.

Question: What voltage battery is required accelerate the proton to that energy?

So I use U = qV

the question is.. what is Q.. is q the charge of the proton being accelerated through the electric field, or is q the charge of the electron that is travelling through the circuit to power the electric field?

Thanks

[cookiemonster]

The proton being accelerated.

cookiemonster

[gameguru]

~+1.602(10-19) Coulombs