Coherent dispersion effects in 2D and 3D high-intensity beams

被引：0
|
作者：
Yuan, Yao-shuo [1 ,2 ,3 ]
Franchetti, Giuliano [4 ,5 ,6 ]
机构：
[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
[2] Spallat Neutron Source Sci Ctr, Dongguan 523803, Peoples R China
[3] Univ Chinese Acad Sci, Shenyang 100049, Peoples R China
[4] GSI Helmholtzzentrum Schwerionenforschung GmbH, Planckstr 1, D-64291 Darmstadt, Germany
[5] Goethe Univ Frankfurt, Max Von Laue Str 7, D-60438 Frankfurt, Germany
[6] Helmholtz Res Acad Hesse, FAIR, HFHF, Max Von Laue Str 12, D-60438 Frankfurt, Germany
来源：
PHYSICS OF PLASMAS | 2023年 / 30卷 / 12期
基金：
中国国家自然科学基金;
关键词：
RMS ENVELOPE EQUATIONS; SPACE-CHARGE; NONLINEAR RESONANCES;
D O I：
10.1063/5.0167535
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Both space charge and dispersion have an effect on high-intensity beams in circular accelerators or transport sections with bending magnets and may lead to emittance growth and beam loss. In this paper, we present an investigation of the combined effect of dispersion and space charge on two-dimensional beams deepening the understanding of the 120 (degrees) dispersion-induced instability. We also investigate the 90 (degrees) envelope instability, which in the absence of the dispersion, mixes the confluent and parametric resonances. We show here that the presence of dispersion and high intensity breaks the overlapping and separates the two resonances. Furthermore, we study the beam dynamics of three-dimensional bunched beams and find the surprising result that the synchrotron motion can split the dispersion mode into two equally separated "sideband" modes according to the beam intensity and synchrotron frequency.
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页数：12
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