Particle Accelerator Cavities

 Particles receive an accelerating or de-accelerating force when they are injected into a cavity structure depending on the type, phase of the excited mode and resonant frequency of the cavity. This reaction is basically based on the shape of accelerator called as “Cavity”.In principles  cavity is a metallic empty chamber,filled with vacuum which stores electrical field and magnetic field that provides acceleration of particles

   Particle acceleration can be done by 2 methods;

1_ Electrostatic Accelerator Cavities

   These types of accelerators generally needs high voltage difference between anode and cathode sides of the cavities. The voltage differences between anode and cathode like 1MV. To supply this amount of voltage we need 1MW power(Current=1A). For this reason electrostatic accelerators are consume high power.

Example of Electrostatic Accelerator:

Figure 1: Electrostatic Accelerator [1]

2_ RF Particle Accelerator Cavities

   In these accelerators, E-Field and H-Field are excited by an input power coupler unit. Using RF cavities, the same amount of  particle acceleration can be obtained with less power.Determination of electric and magnetic fields inside the cavity can be done by solving Maxwell Equations, numerically.

Figure 2: RF Particle Accelerator [2]