Explain the construction of a cyclotron with a diagram.

(N/A) The construction of a cyclotron is as shown in the diagram.
It consists of two small hollow,metallic half-cylinders,$D_{1}$ and $D_{2}$,called 'dees' because they are in the shape of the letter $D$.
They are mounted inside a vacuum chamber between the poles of a powerful electromagnet.
The dees are connected to a source of high-frequency alternating voltage of a few hundred kilovolts.
The beam of charged particles to be accelerated is injected into the dees near their center $P$,in a plane perpendicular to the magnetic field.
The charged particles are pulled out of the dees by a negatively charged deflecting plate through a window $W$.
The whole device is kept in a high vacuum so that air molecules do not collide with the charged particles.