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

A technology for synchronous acceleration and control devices, applied in magnetic resonance accelerators, X-rays/γ-rays/particle irradiation therapy, electrical components, etc., can solve the problems that the energy range of accelerated ions cannot be expanded, and the construction cost of pre-accelerators will increase. Widen the lower limit, reduce construction costs, and optimize the matching effect

Active Publication Date: 2011-04-20
INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 on the main ring CSRm of the cooling storage ring of the Lanzhou Heavy Ion Accelerator, and the relevant research on the treatment of cancer with heavy ions has been carried out. Specifically, the method of the present invention will be described by taking the implementation of a cancer treatment terminal cancer radiation therapy research as an example :

[0034] 1. ECR ion source provides 129 Xe 27+ Ions pass through the fan-focused cyclotron SFC (energy constant K=69), are pre-accelerated to an ion implantation with an energy of 2.93 MeV / u, and are transported to the entrance of the CSRm. number is 10 7 magnitude, trigger the acceleration system components, and start the synchronous acceleration process;

[0035] 2. Synchronously trigger the high-frequency accelerating cavity and the corresponding magnetic field power supply system, store the ion cyclotron frequency at 0.147MHz, set the working frequen...

Embodiment 2

[0039] Example 2: The method of the present invention has been applied on the main ring CSRm of the cooling storage ring of the Lanzhou Heavy Ion Accelerator, and the relevant research on the treatment of cancer with heavy ions has been carried out. Specifically, the method of the present invention will be described by taking the implementation of a cancer treatment terminal cancer radiation therapy research as an example :

[0040] 1. ECR ion source provides 12 C 4+ Ions, through the fan-focused cyclotron SFC (energy constant K=69), are pre-accelerated to an ion implantation with an energy of 7.0 MeV / u and transported to the entrance of the CSRm. number is 10 8 magnitude, trigger the acceleration system components, and start the synchronous acceleration process;

[0041] 2. Synchronously trigger the high-frequency accelerating cavity and the corresponding magnetic field power supply system, store the ion cyclotron frequency at 0.227MHz, set the working frequency of the hig...

Embodiment 3

[0045] Example 3: The method of the present invention has been applied on the main ring CSRm of the cooling storage ring of the Lanzhou Heavy Ion Accelerator, and the relevant research on the treatment of cancer with heavy ions has been carried out. Specifically, the method of the present invention will be described by taking the implementation of a cancer treatment terminal cancer radiation therapy research as an example :

[0046] 1. ECR ion source provides 36 Ar 18+ Ions, after passing through the separation fan cyclotron SSC (energy constant K=450), are pre-accelerated to an ion implantation with an energy of 22.0 MeV / u and transported to the entrance of the CSRm. number is 10 8 magnitude, trigger the acceleration system components, and start the synchronous acceleration process;

[0047] 2. Synchronously trigger the high-frequency accelerating cavity and the corresponding magnetic field power supply system. The cyclotron frequency of the stored ions is 0.398 MHz. The w...

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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 cavity in a synchrotron is adopted to use a high frequency cavity 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 intermediate energy platform, the high frequency cavity 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 is loaded 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 a method for accelerating ions in a proton-heavy ion cancer treatment synchrotron, in particular to a method for synchronous acceleration with high-frequency variable harmonics and a control device thereof. Background technique: [0002] Heavy ions have the characteristics of inverted depth dose distribution (Bragg peak), small side scattering, high relative biological effect (RBE) and low oxygen enhancement ratio (OER) in beam irradiation, which make heavy ion beams treat cancer Become the most advanced and effective cancer radiation therapy in the world today. At present, the results of preliminary clinical treatment trials show that heavy ion beams have very significant curative effects in cancer treatment, and there are no obvious toxic and side effects. [0003] The synchronous storage ring is the most basic accelerator device for proton-heavy ion cancer therapy. Its operation mode is to inject th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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