Novel superconducting cyclotron tuning system

A cyclotron and superconducting technology, applied in magnetic resonance accelerators, multi-carrier systems, electrical components, etc., can solve the problems of system DC offset, reduce digital system delay, phase imbalance, etc., to improve tuning accuracy and Noise resistance performance, improve self-adjustment ability, and realize the effect of simple and easy solution
CN107864548AActive Publication Date: 2018-03-30HEFEI CAS ION MEDICAL & TECHNICAL DEVICES CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HEFEI CAS ION MEDICAL & TECHNICAL DEVICES CO LTD
Publication Date
2018-03-30

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Abstract

The invention discloses a novel superconducting cyclotron tuning system. An analog IQ (in-phase and quadrature) phase detection module is used for modulating sine I and cosine Q of phase differences of LO (local oscillation) and RF (radio frequency) signals, and the modulated signals are used as input signals for an analog IQ phase detection calibration module; the analog IQ phase detection calibration module is used for calibrating measurement errors of the analog IQ phase detection module and provides real-time detection for the analog IQ phase detection module; after completing calibration,the analog IQ phase detection module is automatically turned off, and the influence of the analog IQ phase detection calibration module on analog IQ phase detection results is avoided. The combination technique of an analog signal processing system and a digital signal system is used herein, providing improved tuning precision and noise tolerance for the system and reduced time delay for a feedback system that is caused by signal processing; the analog IQ phase detection calibration module in the system of the invention provides improved self-adjusting capacity and extended applicable range for the analog IQ phase detection module.
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Description

technical field

[0001] The invention belongs to the technical field of cyclotrons, and in particular relates to a novel superconducting cyclotron tuning system. Background technique

[0002] Superconducting cyclotrons are more and more widely used in medical fields such as PET (positron emission tomography) diagnosis, isotope production and proton therapy due to their unique compactness and low power consumption. Among them, the resonant cavity is one of the important parts of the superconducting cyclotron, and the resonant cavity mainly provides the electric field for ion acceleration. The working state of the resonator directly affects the beam quality. However, due to the electromagnetic thermal effect, mechanical vibration, beam load effect and other factors during the operation of the resonator, the resonator cannot operate stably in the specified working state, resulting in excessive reflected power of the power source and damage to the transmission system and power. ...

Claims

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