Patent ID: 9044605
Filing Date: 2015-06-02
Classification: A61N,G01T

Abstract:
1. A beam monitor system comprising a collection electrode for detecting a charged particle beam passing therethrough, a signal processing device, and a beam monitor controller, wherein: the collection electrode includes a plurality of groups each of which is made up of a plurality of adjoining wire electrodes and divided into segments each including a plurality of adjoining wire electrodes, and each wire electrode in a segment in a group is connected to the signal processing device by using the same line as a wire electrode in a segment in each of the other groups, and the wire electrodes in each segment in each of the other groups are connected to the signal processing device by employing permutation connection varying from group to group so that no two adjoining channels are physically continuous, and the signal processing device rearranges detection signals outputted from the wire electrodes based on information related to a planned beam irradiation target position and information on the permutation connection and outputs the result of the rearrangement as a processing signal, and the beam monitor controller calculates the beam position and the beam width of the charged particle beam that passed through the wire electrodes based on the processing signal outputted from the signal processing device.