Take the tour ×  This is the setup, I have in my mind:   O1, O2,
O3 and O4 are 4 oscillators.  The arrows in between the Dees
represent the alternating EMF the Oscillators will generate.  I
think we can easily adjust the frequency of the alternating EMF
(T/4) in each oscillator and it seems to work. Any reason it
wouldn't? and Why we only use semi-circular Dees?  Why 4 Dees?
Because it would increase the acceleration of the charged
particle (not the final velocity); hence, it would take a lot
less time to accelerate a particle to a great velocity as
compared to that of a cyclotron with 2 Dees. It doesn't seems
like a necessary requirement but my main question was is there a
reason to use D shaped electrodes?  share|improve this question
No idea, but I guess it's cheaper that way (2 oscilators,
instead of 4), and you can still get high speeds. – 
MyUserIsThis Jan 28 at 10:47 If they are quarter circular,
they'd be called $\Delta$s and not $D$s... :-) All joking aside,
what is the problem you are trying to sol