CERN Accelerating science

CERN Document Server 2,041 záznamov nájdených  1 - 10ďalšíkoniec  skoč na záznam: Hľadanie trvalo 0.17 sekúnd. 
1.
Shaping transverse beam distributions by means of adiabatic crossing of resonances / Capoani, Federico
Non-linear effects are responsible for peculiar phenomena in the dynamics of charged particles in circular accelerators [...]
CERN-THESIS-2022-364 - 222 p.

2.
Adiabatic theory for slowly varying Hamiltonian systems with applications to beam dynamics / Capoani, Federico
In this work, we present two models in which adiabatic invariance theory can be applied to achieve peculiar effects in beam dynamics, exploiting the phase space separatrix crossing caused by the passage through specific resonances of a system [...]
CERN-THESIS-2018-476 - 107 p.

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3.
Manipulation of transverse emittances in circular accelerators by crossing non-linear 2D resonances / Bazzani, A. (Bologna U. ; INFN, Bologna) ; Capoani, F. (Bologna U. ; INFN, Bologna ; CERN) ; Giovannozzi, M. (CERN)
Controlling nonlinear effects in the transverse dynamics of charged particle beams in circular accelerators opens new possibilities for controlling some of the beam properties. Beam splitting by crossing a stable 1D nonlinear resonance is part of the routine operation of the CERN Proton Synchrotron. [...]
arXiv:2202.04559.- 2022-05-03 - 24 p. - Published in : Eur. Phys. J. Plus 137 (2022) 594 Fulltext: PDF; Publication: PDF;
4.
Analysis of a double-resonance crossing for beam splitting / Capoani, F (Bologna U. ; CERN) ; Bazzani, A (Bologna U.) ; Giovannozzi, M (CERN)
Beam splitting can be performed by adiabatic crossing of a given one-dimensional non-linear resonance. This process is routinely used at the CERN PS to deliver the proton beam to the SPS fixed-target physics. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) WEPL096 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.WEPL096
5.
Recent Progress on Nonlinear Beam Manipulations in Circular Accelerators / Bazzani, Armando (U. Bologna (main) ; INFN, Bologna) ; Capoani, Federico (CERN ; U. Bologna (main) ; INFN, Bologna) ; Giovannozzi, Massimo (CERN)
In recent years, transverse beam splitting by crossing a stable resonance has become the operational means to perform MultiTurn Extraction (MTE) from the CERN PS to the SPS. This method delivers the high-intensity proton beams for fixed-target physics at the SPS. [...]
2022 - 7 p. - Published in : JACoW HB 2021 (2022) 52-58 Fulltext: PDF;
In : 64th ICFA Advanced Beam Dynamics Workshop on High Intensity and High Brightness Hadron Beams (HB 2021), Batavia, Illinois, United States, 4 - 9 Oct 2021, pp.52-58
6.
Adiabaticity of emittance exchange due to crossing of the coupling resonance / Bazzani, A. (Bologna U., Dept. Astron.) ; Capoani, F. (Bologna U., Dept. Astron. ; CERN) ; Giovannozzi, M. (CERN) ; Neishtadt, A.I. (Loughborough U. ; IMCS, Moscow)
In circular accelerators, crossing the linear coupling resonance induces the exchange of the transverse emittances, provided the process is adiabatic. This has been considered in some previous works, where the description of the phenomenon has been laid down, and, more recently, where a possible explanation of the numerical results has been proposed. [...]
arXiv:2105.04219.- 2021-09-01 - 21 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 094002 Fulltext: PDF; Fulltext from publisher: PDF;
7.
Simulation of transverse beam splitting using time-dependent dipolar or quadrupolar kicks / Capoani, Federico
Two simple systems with high relevance for accelerator physics have been studied in detail in the context of this Summer Student Project. [...]
CERN-STUDENTS-Note-2017-142.
- 2017
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8.
Linear Coupling and Adiabaticity of Emittance Exchange / Capoani, Federico (CERN ; Bologna U.) ; Bazzani, Armando (Bologna U.) ; Giovannozzi, Massimo (CERN) ; Neishtadt, Anatoly I (Moscow, Space Res. Inst. ; Loughborough U.)
In circular accelerators, crossing the coupling resonance induces the exchange of the transverse emittances, provided the process is adiabatic. In this paper, we introduce a theoretical framework to analyze the resonance-crossing process, based on Hamiltonian mechanics, which is capable of explaining all the features of the emittance exchange process..
Geneva : JACoW, 2021 - 4 p. - Published in : JACoW IPAC 2021 (2021) 1972-1975 Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.1972-1975
9.
Analytical and numerical studies of transverse beam splitting used for the CERN PS Multi-Turn Extraction / Hernalsteens, Cedric
In view of the programme of reduction of beam losses in the PS for the high intensity beams, in particular that for the CNGS experiment, a novel extraction method was designed for beam transfer between the PS to the SPS [...]
CERN-THESIS-2011-446 - 129 p.

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10.
Hamiltonian theory of the crossing of the $2 Q_x -2 Q_y=0$ nonlinear coupling resonance / Bazzani, A. (U. Bologna, DIFA ; INFN, Bologna) ; Capoani, F. (U. Bologna, DIFA ; INFN, Bologna ; CERN) ; Giovannozzi, M. (CERN)
In a recent paper, the adiabatic theory of Hamiltonian systems was successfully applied to study the crossing of the linear coupling resonance, $Q_x-Q_y=0$. A detailed explanation of the well-known phenomena that occur during the resonance-crossing process, such as emittance exchange and its dependence on the adiabaticity of the process was obtained. [...]
arXiv:2208.11519.- 2022-10-03 - 21 p. - Published in : Phys. Rev. Accel. Beams 25 (2022) 104001 Fulltext: 2208.11519 - PDF; Publication - PDF;

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