Device and method for fast beam current modulation in a particle accelerator

摘要

The present invention relates to a circular particle accelerator capable of modulating the particle beam current exiting the circular particle accelerator. The circular particle accelerator includes: an ion source for generating the particle beam; Dee electrode and counter-Dee electrode separated from each other by gaps for accelerating the particle beam, the counter-Dee electrode being grounded; a generator capable of applying an alternating high voltage to the Dee electrode, so as it is possible to have an electric field between the gaps; means for measuring the current intensity of the particle beam exiting the circular particle accelerator. It also comprises a regulator capable of modulating the Dee electrodes voltage amplitude (VD) by comparing a given set point (I0) of the current intensity of the particle beam and the measured value of the current intensity (I′M) of the particle beam.

主权项

1. A circular particle accelerator for generating a beam of charged particles comprising:
an ion source configured to generate the charged particles; accelerating electrodes separated from each other by gaps; a generator configured to apply an alternating voltage to the accelerating electrodes to accelerate the charged particles in an electric field in the gaps and to form a beam current, the generator comprising a control input configured for receiving a set-point value for the amplitude of the alternating voltage applied to the accelerating electrodes, wherein different set point values result in different amounts of energy gained by the charged particles in the electric field in the gaps; and a regulator connected with the generator and configured to provide at least one set point value to the control input where the beam current is cut-off and dark current is not produced by the circular particle accelerator.