I just derived a little formula of protons moving in a magnetic field. With the symetry etc I have I get this: p = qrB Now I want to calculate the angular as a function like this: p = constant * B Where p is Gev/C, r is in meters. I don't know what numbers or better what form B and q should have to get all numbers right. Anyone care to shine some light on this..? Edit, my field is 1.74T r in meters.