Transport of 3D space charge dominated beams

L&Uuml; Jian-Qin

doi:10.1088/1674-1137/37/10/107001

Chinese Physics C> 2013, Vol. 37> Issue(10) : 107001 DOI: 10.1088/1674-1137/37/10/107001

Transport of 3D space charge dominated beams

LÜ Jian-Qin

State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China

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Abstract：
In this paper we present the theoretical analysis and the computer code design for the intense pulsed beam transport. Intense beam dynamics is a very important issue in low-energy high-current accelerators and beam transport systems. This problem affects beam transmission and beam qualities. Therefore, it attracts the attention of the accelerator physicists worldwide. The analysis and calculation for the intense beam dynamics are very complicated, because the state of particle motion is dominated not only by the applied electromagnetic fields, but also by the beam-induced electromagnetic fields (self-fields). Moreover, the self fields are related to the beam dimensions and particle distributions. So, it is very difficult to get the self-consistent solutions of particle motion analytically. For this reason, we combine the Lie algebraic method and the particle in cell (PIC) scheme together to simulate intense 3D beam transport. With the Lie algebraic method we analyze the particle nonlinear trajectories in the applied electromagnetic fields up to third order approximation, and with the PIC algorithm we calculate the space charge effects to the particle motion. Based on the theoretical analysis, we have developed a computer code, which calculates beam transport systems consisting of electrostatic lenses, electrostatic accelerating columns, solenoid lenses, magnetic and electric quadruples, magnetic sextupoles，octopuses and different kinds of electromagnetic analyzers. The optimization calculations and the graphic display for the calculated results are provided by the code.

References

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LÜ Jian-Qin. Transport of 3D space charge dominated beams[J]. Chinese Physics C, 2013, 37(10): 107001. doi: 10.1088/1674-1137/37/10/107001

LÜ Jian-Qin. Transport of 3D space charge dominated beams[J]. Chinese Physics C, 2013, 37(10): 107001. doi: 10.1088/1674-1137/37/10/107001 shu

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Received: 2012-11-26
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Transport of 3D space charge dominated beams

LÜ Jian-Qin

State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China

Received Date: 2012-11-26
Accepted Date: 1900-01-01
Available Online: 2013-10-05

Abstract: In this paper we present the theoretical analysis and the computer code design for the intense pulsed beam transport. Intense beam dynamics is a very important issue in low-energy high-current accelerators and beam transport systems. This problem affects beam transmission and beam qualities. Therefore, it attracts the attention of the accelerator physicists worldwide. The analysis and calculation for the intense beam dynamics are very complicated, because the state of particle motion is dominated not only by the applied electromagnetic fields, but also by the beam-induced electromagnetic fields (self-fields). Moreover, the self fields are related to the beam dimensions and particle distributions. So, it is very difficult to get the self-consistent solutions of particle motion analytically. For this reason, we combine the Lie algebraic method and the particle in cell (PIC) scheme together to simulate intense 3D beam transport. With the Lie algebraic method we analyze the particle nonlinear trajectories in the applied electromagnetic fields up to third order approximation, and with the PIC algorithm we calculate the space charge effects to the particle motion. Based on the theoretical analysis, we have developed a computer code, which calculates beam transport systems consisting of electrostatic lenses, electrostatic accelerating columns, solenoid lenses, magnetic and electric quadruples, magnetic sextupoles，octopuses and different kinds of electromagnetic analyzers. The optimization calculations and the graphic display for the calculated results are provided by the code.