MPM hybrid algorithm applied to numerical simulation of ECR ion source

Abstract

The invention belongs to the field of numerical simulation technology of ECR ion sources, and particularly relates to an MPM hybrid algorithm applied to numerical simulation of an ECR ion source. Thealgorithm is suitable for use in an ECR ion source structure. The MPM hybrid algorithm of simulation of the ECR ion source is established through combining an MAGY theory and PIC / MCC simulation algorithms, a time-varying electromagnetic field is described by the MAGY theory, self-consistent interaction of charged particles and the electromagnetic field is described by the PIC algorithm, and inter-particle collision processes are described by the MCC algorithm. A complex and complete solving process which originally needs to be carried out on Maxwell's equations is enabled to be simplified to solving on a set of coupled one-dimensional partial differential equations about mode amplitudes, relatively larger time step length can also be taken due to that compared with high-frequency cycles, changes of the mode amplitudes are slower, and computational complexity and a computational amount are greatly reduced. In addition, an electromagnetic model is adopted, and thus compared with adoptingan electrostatic model, the algorithm can more accurately describe an actual physical process.

Description

technical field [0001] The invention belongs to the technical field of ECR ​​ion source numerical simulation. Specifically, it is an MPM hybrid algorithm applied to numerical simulation of ECR ​​ion sources. Background technique [0002] In recent decades, relying on the advanced large-scale scientific equipment of heavy ion accelerators, a discipline group with heavy ion nuclear physics as the core has been formed, including the study of hadrons, nuclei, atoms, molecules, clusters in the microscopic world, and the macroscopic world. Conduct basic research for in-depth understanding and cognition of plasma, solid, celestial bodies, and the universe, as well as carry out applied basic research and applied research for the benefit of mankind in interdisciplinary fields such as aerospace, energy, materials, biology, and medicine. These heavy ion accelerator devices without exception require high-performance high-current high-charge state ion beam ion source devices. After deca...

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Problems solved by technology

[0009] In view of the above problems and deficiencies, in order to solve the technical problems of model accuracy and calculation consumption in the PIC / MCC algorithm of the ECR ion source, the present invention provides a MPM hybrid algorithm applied to the numerical simulation of the ECR ion source, which has a higher simulation Accuracy and computational efficiency, while maintaining the advantages of rich numerical diagnosis of PIC / MCC algorithm

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