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The synchrotron is a circular particle accelerator that can accelerate charged fundamental particles or ions to very high (relativistic) velocities. For acceleration, a suitably synchronised high-frequency alternating electric field (microwaves) is used. In order to keep the particles on a closed track, the magnetic fields of the electromagnets in use need to be readjusted depending on the achieved energy of the particles. To avoid the loss of particles by collisions with gas particles, the particle trajectory lies in a complete vacuum tube system with ultra high vacuum.