System used for measuring radio-frequency cavity voltage of cyclotron

Abstract

The invention discloses a system used for measuring the radio-frequency cavity voltage of a cyclotron. The system comprises radio frequency cavities, DEE (diethyl ether) boards, shielding covers, detectors and a vacuum tank, wherein the radio frequency cavities are sheathed in the vacuum tank; each radio frequency cavity is sheathed with the shielding cover and is a cyclotron radio frequency cavity; the detectors are energy spectrum detectors; a bremsstrahlung ray full-energy peak energy spectrum is detected through the detectors; and the detectors are arranged above two ends of the DEE boards. The system has the beneficial effects that the system has simple and reliable principle, high feasibility and high operability, and radio-frequency cavity peak value voltage can be accurately obtained. Compared with a traditional electronics measurement method, the system can avoid the influence of various factors on cavity distribution parameters, radio-frequency cavity peak value voltage can be accurately reflected to meet the physical beam tuning requirement of the cyclotron, the design of the shielding covers guarantees the tightness of the cavity, and meanwhile, the detection efficiencyof the detectors is improved. The system has good social benefit and is suitable to be prompted and used.

Description

technical field [0001] The invention relates to a system, in particular to a system for measuring the voltage of a high-frequency cavity of a cyclotron, and belongs to the technical field of system application for measuring the voltage of a high-frequency cavity of a cyclotron. Background technique [0002] Cyclotrons are widely used in the field of nuclear medicine, especially in the fields of radiopharmaceuticals and tumor treatment. The high-frequency resonant cavity of the proton cyclotron is excited by a high-frequency transmitter. Its function is to form a high-frequency electric field in the gap between the cavity electrode and the ground. Whenever the ion beam passes through the gap, it is accelerated by the harmonic force of the electric field force. The energy gain obtained after acceleration is proportional to the voltage of the cavity. Therefore, the level and stability of the cavity voltage are closely related to beam adjustment and beam quality and intensity...

AI Technical Summary

Problems solved by technology

Use traditional methods (such as direct measurement method, network analyzer measurement, Q value method measurement, etc.) to directly measure the cavity voltage. The normal distribution of cavity voltage and the accuracy of sampling voltage are affected by the change of cavity distribution parameters and characteristic impedance.

The measurement methods and methods are insecure, it is difficult to accurately measure the voltage of the high-frequency cavity, and it is limited by various conditions

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