Feedback monitoring system and method for ion beam current intensity of superconducting cyclotron
A cyclotron and monitoring system technology, applied in general control systems, radiation measurement, control/adjustment systems, etc., can solve the problems of low beam intensity accuracy, unstable control system, high cost, etc., to improve collection efficiency, Fast real-time monitoring and recording, increasing the effect of stability
Active Publication Date: 2020-02-18
HEFEI CAS ION MEDICAL & TECHNICAL DEVICES CO LTD
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Problems solved by technology
[0003] However, the previous accelerators were relatively large, taking up a lot of space, high cost, low beam intensity and precision, unstable control system, etc. Since the accelerator was put into medical treatment, there have been many medical accidents
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[0050] Taking the SC200 superconducting proton cyclotron as an example, a device for beam current intensity feedback monitoring of a medical superconducting cyclotron is introduced. In the cyclotron, the beam current intensity of the ion source is set by the main controller of the treatment control system, and the beam current intensity is converted into a current in the form of a percentage of the beam current intensity, and transmitted to the FPGA through a coaxial cable. The electronic control unit is converted into digital signal processing and storage in the FPGA electronic control unit, and then the digital signal is converted into current, which is transmitted to the arc power supply through the cable to control the arc power supply voltage. At the same time, the treatment control system transmits parameters through Ethernet to optical fiber, and controls The current of the filament power supply, the arc voltage and the filament current are added to the ion source filame...
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The invention discloses an ion beam flow intensity feedback-monitoring system and method for a superconductive cyclotron. The system comprises a host computer, an FPGA electron control unit, a filament power supply, an arc power supply, an ion source filament, an accelerator Faraday pail, a transmission line and a nanoamp level amplifier; the filament power supply heats a filament to generate electrons, the electrons collide with hydrogen to generate ions, ions are led out by a high-frequency voltage and strike on the Faraday pail arranged in an outlet of a deflecting plate, the Faraday pail is connected to the nanoamp level current amplifier via a coaxial cable, and the ion beam flow intensity is monitored via collection by the FPGA electron control unit and uploading by to the host computer. The anti-interference coaxial cable, the simple and practical Faraday pail and the FPGA electron control unit of fast processing are used, the intensity of the beam flow for treating patients isback fed and monitored effectively, the stability of a patient treatment system is enhanced, and plans are made for patient treatment.
Description
technical field [0001] The invention belongs to the technical field of superconducting cyclotrons, and in particular relates to a feedback monitoring system and method for ion beam current intensity of superconducting cyclotrons. Background technique [0002] With the rapid development of nuclear medicine, accelerators have been widely used in positron emission tomography (PET) technology, isotope production, and proton therapy. Among them, proton therapy is regarded as a "cancer-causing weapon". This is the most advanced radiotherapy technology in the medical field today. Proton therapy is a radiotherapy therapy that is more advanced than traditional X-ray radiotherapy. It is favored by more and more medical experts and patients because of its precise treatment, small side effects and high-dose targeted irradiation. In 1931, the world's first cyclotron was born, opening a new era of artificial production of radioactive elements. With the development of high-energy physic...
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IPC IPC(8): G01T1/29G05B19/042
CPCG01T1/29G05B19/0423
Inventor 陈永华张良坤陈俞钱徐世文宋云涛陈根杨庆喜
Owner HEFEI CAS ION MEDICAL & TECHNICAL DEVICES CO LTD