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A linear accelerator with continuously adjustable energy and its application

A technology of linear accelerators and accelerators, applied in the direction of linear accelerators, accelerators, electrical components, etc., can solve the problems of increased shielding costs, poor beam quality, and low passing efficiency

Active Publication Date: 2021-04-27
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

However, this method will generate a large amount of radiation, which will easily cause the activation of the device and increase the cost of shielding. Moreover, the quality of the beam after scattering is poor, most of the beam will be lost, and the passing efficiency is low.

Method used

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  • A linear accelerator with continuously adjustable energy and its application
  • A linear accelerator with continuously adjustable energy and its application

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Embodiment 1

[0041] Such as figure 1 As shown, it is a linear accelerator with continuously adjustable energy of the present invention, which includes a front-end accelerator at normal temperature, N identical acceleration units connected in series behind it, and an extraction beam drawn from the output end of the end acceleration unit; the front-end at normal temperature The accelerator and each acceleration unit have their own independent RF power source, feeding system and low-level control system.

[0042] Among them, the radio frequency power source is used to provide radio frequency power for the acceleration unit, specifically, a solid-state amplifier SSA can be used; the feeding system is used to feed radio frequency power from the radio frequency power source to the acceleration unit; the low-level control system LLRF is used to adjust the radio frequency power And phase, specifically digital low level can be used. In practical applications, a signal reference line is also includ...

Embodiment 2

[0053] Based on the linear accelerator with continuously adjustable energy in Embodiment 1 of the present invention, in this embodiment, the linear accelerator with continuously adjustable energy is modularized, and some acceleration units are coupled together to form a modular system, so that The linear accelerator of the present invention can simultaneously provide beam currents of different energies, and meet the production requirements of various isotopes at the same time. Specifically include the following.

[0054] Among the N acceleration units, multiple adjacent acceleration units are coupled to form an acceleration module, and the output of each acceleration module is provided with a corresponding extraction beamline for the production of some commonly used specific energy isotopes. The extraction beamlines except the terminal extraction beamlines are equipped with a beam splitter, which is used to provide two channels, one channel is used to realize the straight line...

Embodiment 3

[0062] Based on the linear accelerator with continuously adjustable energy disclosed in Embodiment 2 of the present invention, this embodiment provides an application of the linear accelerator in isotope production. The specific application process includes: determining the required energy according to the target isotope; Energy Accelerates the proton beam by adjusting the radio frequency power and synchronous phase of the acceleration unit, so that the proton beam with corresponding energy can be obtained from the extraction beam line for the production of isotopes. Specifically, through the normal temperature front-end accelerator + the first acceleration module 21 + the second acceleration module 22, the proton beam can be accelerated to 7-12 MeV, the average beam intensity is 200-500 μA, and the corresponding isotope production equipment is introduced through the second extraction beam line 32 , producing PET tomographic imaging isotopes 18 F et al.

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Abstract

The invention discloses a linear accelerator with continuously adjustable energy and its application. It includes a normal-temperature front-end accelerator, several identical acceleration units or several acceleration modules connected in series behind the normal-temperature front-end accelerator, and terminal lead-out beamlines drawn from the output end of the acceleration unit at the end; the acceleration modules include mutual Multiple acceleration units coupled in series. The present invention achieves continuous adjustment of energy and current intensity, and has almost no loss of beam current, and can run stably for a long time; moreover, the application of the linear accelerator can meet the production requirements of various isotopes, and can also provide different neutron fluxes. Neutrons improve work efficiency and save use costs.

Description

technical field [0001] The invention relates to a linear accelerator with continuously adjustable energy and its application, belonging to the technical field of particle linear accelerators. Background technique [0002] Low-energy high-current protons and heavy ions are more and more widely used in scientific research, industry, medical treatment, aerospace, etc., and ions in different energy segments have their own unique functions, such as accelerating protons or alpha particles to 2.5MeV, which can be used in Ion beam analysis, accelerating protons to 7-12MeV, can be used in PET tomography imaging isotope production, accelerating proton energy to 15-19MeV, can be used in SPECT isotope production, accelerating α particles to above 20MeV, can be passed 209 Bi(a,2n) 211 At reaction for 211 The production of At accelerates the proton energy to above 70MeV, which can be used in front-end accelerators of application acceleration devices such as high-current accelerators, sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05H9/00H05H7/02H05H7/22
CPCH05H7/02H05H7/22H05H9/00H05H2007/025
Inventor 王志军窦为平何源
Owner INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
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