Cyclotron is used to

What do you mean by 'dees' which is used in cyclotron?

Assertion: Cyclotron does not accelerate electrons.
Reason: Mass of the electrons is very small.

An alternating electric field of frequency $f$ is applied across the radius $R$ of a cyclotron to accelerate protons (mass $m$). The operating magnetic field $B$ used and kinetic energy $(K.E.)$ of the proton beam produced by it are respectively ($e=$ charge on proton).

Discuss the motion of a charged particle in a uniform magnetic field with initial velocity perpendicular to the magnetic field. $OR$ Explain the principle of a cyclotron.

Explain the working of a cyclotron and give its uses.