A Pulse Power Supply for Kicking Rail Magnets

Abstract

The invention discloses a pulse power supply for kick rail magnets, comprising: a high-voltage power supply module, a low-voltage power supply module, a power conversion unit and a digital controller module; Orderly flow between the magnet and the energy storage capacitor; one end of the digital controller module receives the external trigger control signal, one end is connected to the power conversion unit, and the other end samples the output current signal; the output current waveform of the pulse power supply is controlled by the external trigger signal , the rising edge of the trigger signal is the command to increase the current, and the falling edge of the trigger signal is the command to decrease the current. The switching device in the power conversion unit is driven by the digital controller module to achieve high-voltage rapid current-up, low-voltage steady current, and reduced output. current ripple. In this way, the output current waveform of the power supply of the present invention can be a trapezoidal wave, the repetition frequency can reach thousands of hertz, and the power supply can work in a direct current mode.

Description

technical field [0001] The invention belongs to the field of pulse power supply in proton heavy ion therapy, and more specifically relates to a pulse power supply of a rail kicking magnet. Background technique [0002] In cyclotron-based proton therapy devices, point scanning technology is usually used as the treatment terminal scanning method. The 250MeV continuous beam proton beam drawn from the cyclotron passes through the energy selection section to change the fixed energy proton beam into a 70MeV-240MeV continuous energy adjustable proton beam, and then enters the treatment room through the corresponding beam transport line. During treatment with pencil spot scanning, the proton beam needs to penetrate the patient for a few milliseconds before switching to the next spot. In the process of point-to-point switching and energy switching, a fast beam switch is needed to reduce unnecessary radiation dose, and it needs to be able to work in DC mode to provide a fast safety c...

AI Technical Summary

Problems solved by technology

The existing rail kick magnet power supply scheme can realize trapezoidal or sine-like output with a repetition rate up to gigahertz, but it is difficult to simultaneously output a trapezoidal wave with a repetition rate of thousands of hertz, and can work in DC model

Images