Hadron beam monitoring device and method based on pixel sensor chip

Abstract

The invention provides a hadron beam monitoring device based on a pixel sensor chip. The hadron beam monitoring device comprises a vertical support and two independent two-dimensional monitoring devices. Two two-dimensional monitoring devices are fixed on two vertical plates of the vertical support. Each two-dimensional monitoring device is composed of a silicon pixel chip, a chip bonding circuit board, an anode plate and a cathode plate. A device monitoring method comprises the steps that a hadron beam passes through gas above a silicon pixel chip, so that the gas is ionized to produce an electron cluster; the electron cluster drifts under the action of an electric field above the silicon pixel chip, and is collected by a corresponding pixel on the silicon pixel chip; according to the pixel response on the silicon pixel chip, the two-dimensional information of the plane of the hadron beam on the silicon pixel chips is acquired; the hadron beam successively passes through the spaces above the silicon pixel chips which are mutually vertical on two two-dimensional monitoring devices; and the three-dimensional distribution of the hadron beam is reconstructed. According to the invention, the three-dimensional distribution information of the hadron beam is monitored in real time, and the device and the method have the advantages of beam non-blocking performance, radiation resistance and high position resolution.

Description

technical field [0001] The invention relates to the field of hadron therapy, in particular to a hadron beam current monitoring device and method based on a pixel sensor chip, which is used for real-time monitoring of hadron beam current. Background technique [0002] After the hadron enters the matter, it will not release a large amount of energy immediately, but will release most of its energy only at the position where the hadron is about to stop, forming a sharp energy peak - the Bragg peak, which is called the Bragg peak effect. According to the Bragg peak effect, using hadrons instead of photons and electrons for tumor treatment can avoid healthy tissues around the tumor, inject more radiation dose into the tumor, and have stronger biological effects than electrons and photons. [0003] Currently, there are two beam delivery techniques for hadron therapy: beam scattering and beam scanning. Beam scattering technology uses scatterers to diverge the beam, and then uses cu...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a hadron beam monitoring device and method based on a pixel sensor chip for the problem that the hadron therapy of the existing beam scanning technology needs to monitor the intensity and position distribution of the beam in real time , using silicon pixel chips to monitor hadron beams in real time, with beam non-interception, radiation resistance and high position resolution

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