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Synchronous acceleration method of high frequency variable harmonics and control device thereof

A technology of synchrotron acceleration and control device, applied in magnetic resonance accelerator, X-ray/γ-ray/particle irradiation therapy, electrical components, etc. The effect of reducing construction costs, widening the lower limit, and reducing the energy range

Active Publication Date: 2010-02-17
INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This requires that the pre-accelerator of the synchrotron (whether a cyclotron or a linear accelerator) must first accelerate the ions to meet the minimum requirements of the high-frequency cavity, which will also increase the construction cost of the pre-accelerator
At the same time, due to the use of a fixed harmonic order, the energy range of the accelerated ions cannot be extended beyond the operating frequency of the high-frequency cavity

Method used

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  • Synchronous acceleration method of high frequency variable harmonics and control device thereof
  • Synchronous acceleration method of high frequency variable harmonics and control device thereof
  • Synchronous acceleration method of high frequency variable harmonics and control device thereof

Examples

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Effect test

Embodiment 1

[0033] Example 1: The method of the present invention has been applied to the main ring CSRm of the Lanzhou heavy ion accelerator cooling storage ring, and related research on heavy ion cancer treatment has been carried out. Specifically, the method of the present invention is illustrated by the implementation of a cancer treatment terminal cancer irradiation treatment study :

[0034] 1. ECR ion source provided 129 Xe 27+ The ions are injected into the CSRm through the fan-focused cyclotron SFC (energy constant K=69), pre-accelerated to an energy of 2.93MeV / u, and transported to the CSRm entrance. The synchrotron accumulates to a current of 2.5 microamperes and ions. Number is 10 7 Magnitude, trigger acceleration system components, start the synchronous acceleration process;

[0035] 2. Synchronously trigger the high-frequency accelerating cavity and the corresponding magnetic field power system, the cyclotron frequency of the ions is 0.147MHz, and the working frequency of the hig...

Embodiment 2

[0039] Example 2: The method of the present invention has been applied to the main ring CSRm of the Lanzhou heavy ion accelerator cooling storage ring, and relevant research on heavy ion cancer treatment has been carried out. Specifically, the method of the present invention is illustrated by the implementation of a cancer treatment terminal cancer radiation treatment study :

[0040] 1. ECR ion source provided 12 C 4+ The ions, after passing through the fan-focused cyclotron SFC (energy constant K=69), are pre-accelerated to 7.0MeV / u ion injection and transported to the CSRm entrance, and the current intensity is 4.8 microampere accumulated in the synchrotron. Number is 10 8 Magnitude, trigger acceleration system components, start the synchronous acceleration process;

[0041] 2. Synchronously trigger the high-frequency acceleration cavity and the corresponding magnetic field power system, the cyclotron frequency of ions is 0.227MHz, and the working frequency of the high-frequency...

Embodiment 3

[0045] Example 3: The method of the present invention has been applied to the main ring CSRm of the Lanzhou heavy ion accelerator cooling storage ring, and related research on heavy ion cancer treatment has been carried out. Specifically, the method of the present invention is illustrated by the implementation of a cancer treatment terminal cancer irradiation treatment study :

[0046] 1. ECR ion source provided 36 Ar 18+ The ions pass through the separation fan cyclotron SSC (energy constant K=450), and are pre-accelerated to 22.0MeV / u ion injection and transported to the CSRm entrance. The synchrotron accumulates to a current intensity of 3.0 microamps. Number is 10 8 Magnitude, trigger acceleration system components, start the synchronous acceleration process;

[0047] 2. Synchronously trigger the high-frequency acceleration cavity and the corresponding magnetic field power system, the cyclotron frequency of ions is 0.398MHz, and the working frequency of the high-frequency cavit...

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Abstract

The invention relates to the technical field of an ion acceleration method in a proton-heavy ion cancer-treating synchrotron, in particular to a synchronous acceleration method of high frequency variable harmonics and a control device thereof. In the invention, the control device corresponding to the synchronous acceleration of the high frequency variable harmonics is used; a high frequency cavityin a synchrotron is adopted to use a high-frequency electric field of high-order harmonics (second harmonic or fourth harmonic) to accelerate ions, and the frequency of the high-order harmonics is equal to cyclotron frequency of storing ions; when ions are accelerated to a certain amount of intermediate energy, high frequency electric field frequency of the high frequency cavity is changed into low-order harmonics (first harmonic or second harmonic) of the cyclotron frequency of the storing ions; and the ions are accelerated continuously until the ion energy thereof can satisfy the clinical requirements. In work frequency range of the high frequency cavity, high frequency variable harmonics acceleration technology is used, so that difficulty in low end extension is avoided when ferrite isloaded with high frequency system bandwidth. The invention can broaden the energy range of capturing and accelerating ions, and realizes the requirement of ion beam irradiation therapy of tumor of human body with different depths on beam energy on the basis of narrower work frequency range of the high frequency cavity.

Description

Technical field: [0001] The invention relates to the technical field of methods for accelerating ions in a proton-heavy ion cancer synchrotron, in particular to a method for high-frequency variable harmonic synchronous acceleration and a control device thereof. Background technique: [0002] Heavy ions have the characteristics of inverted depth dose distribution (Bragg peak), small side scatter, high relative biological effect (RBE) and low oxygen increase ratio (OER) during beam irradiation, making heavy ion beam treatment of cancer It has become an internationally advanced and effective cancer radiotherapy method. At present, the results of preliminary clinical treatment trials have shown that heavy ion beam therapy has a very significant effect on cancer, and there are no obvious side effects. [0003] Synchronous storage ring is the most basic accelerator device for proton-heavy ion cancer treatment. Its operating mode is to inject heavy ion beams provided by a pre-accelerato...

Claims

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Application Information

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IPC IPC(8): H05H13/04A61N5/10
Inventor 夏佳文原有进刘勇
Owner INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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