How Long Does It Take for Alpha Particles to Complete One Orbit in a Cyclotron?

[eaw07]

Homework Statement

Alpha particles (charge= +2e, mass= 6.68*10^-27kg) are acclerated in a cyclotron to a final orbit radius of .30 m. THe magnetic field in the cyclotron is .80 T. The period of circular motion is?

Homework Equations

f=1/T
F=qvbsin$$\alpha$$
There might be more!

The Attempt at a Solution

 

[LowlyPion]

Welcome to PF.

Don't you want to consider the effect of centripetal acceleration?

Won't mv²/R = qv X B yield your velocity and from that you can figure how long to make 1 revolution?