B.Sc.II, Paper VIII ( IIISemester) Presentation ON Particle Accelerator B.Sc.II, Paper VIII ( IIISemester) By Dr. Mrs. Maheshmalkar P.R.

Particle Accelerator- Any device that accelerates charged particles to very high speeds using electric and/or magnetic fields Basic Structure of Experimentation

Modern accelerators fall into two basic categories: Linear Accelerators- In linear accelerators, particles are accelerated in a straight line, often with a target at one to create a collision Circular Accelerators-Circular accelerators propel particles along a circular path using electromagnets until the particles reach desired speeds/energies Particles are accelerated in one direction around the accelerator, while anti-particles are accelerated in the opposite direction

Linear accelerator (LINAC) Source of particles RF generator with fixed frequency Metallic drift tubes ~ Particles exit from the source and are accelerated by the potential of the first drift tube While the particles travel through the drift tube, the sign of the potential reverses The particles exit from the first drift tube and are accelerated by the potential of the second drift tube As the speed of the particles increases, the distance between two tubes increases

li Energy of a particle after the first tube: U0 is the maximum voltage of the RF generator and s the average phase of the particle between the two tubes + + Consequence: it not a possible to accelerate continuous beam, the particles are accelerated in bunches, the average bunch length is between less than 1 mm up to 1 m

Linear accelerator structure at FERMILAB

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