| Paper |
Title |
Other Keywords |
Page |
| TUPSA034 |
Distortions of Proton Beam 2-D Images and Profiles due to Beam Space Charge
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ion, proton, simulation, linac |
116 |
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- P. I. Reinhardt-Nickoulin, A. Feschenko, S. A. Gavrilov, I. V. Vasilyev
RAS/INR, Moscow
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The special residual gas ion transverse section monitor is used at Proton LINAC INR RAS output to provide measurements of beam parameters. There are distortions and errors of measurements which are caused by various external and internal factors during the formation of beam transverse section images. Below estimations of these distortions and results of numerical simulation of registration process of images are resulted, resolution of the detector and accuracy of measurements which are spent with it are discussed.
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| WEPSB017 |
Space Charge Simulation Using MADX with Account of Synchrotron Oscillations
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lattice, simulation, emittance, extraction |
204 |
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- V. V. Kapin
MEPhI, Moscow
- Y. Alexahin
Fermilab, Batavia
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Direct space charge forces can be simulated with the 6D beam dynamics code MADX using a number of 4D BEAMBEAM elements with Gaussian transverse profile for charge density. To take into account effects of synchrotron oscillations on space charge forces, the amplitude of BEAMBEAM elements is modulated according to the distance between a particle and the bunch center assuming Gaussian longitudinal profile. Parameters of every BEAMBEAM element (charge and sizes) are defined by local values of beta-function and dispersion, while they are updated according to the beam intensity and beam emittances at every turn. MADX script accomplishing this method has been written for the lattice of the existing Debuncher ring. The slow extraction at the 3rd order resonance with simultaneously varying the horizontal tune and the sextupole strength is considered as one of the options for Debuncher to be used in the "mu2e" project. Our MADX simulation results are compared with results obtained by V. Nagaslaev (FNAL) using the particle-in-cell ORBIT-code. The evolutions of the phase-spaces and the beam intensity within ten thousands turns have shown a good agreement between the MADX and ORBIT results.
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| WEPSB023 |
Electron Beam Dynamics with Space Charge in Linear Accelerator
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electron, linac, acceleration, electromagnetic-fields |
215 |
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- Y. A. Fomin, V. Korchuganov
RRC, Moscow
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This paper describes electron beam dynamics with space charge in existing linear accelerator of Kurchatov source of synchrotron radiation. The linac structure operates with standing wave mode pulse power and without particle prebuncher. The results of comparison of electron beam parameters at the linac output with and without space charge consideration are presented. Electron beam shaping process starting from continuous beam to bunched beam on initial stage of acceleration under the action both of linac RF field and particle space charge field is considered. The main attention gives to calculate particle space charge field of the electron beam, which bring in essential contribution into beam dynamics on initial stage of shaping and accelerating electron bunches. The results of computer simulation of the electromagnetic field into linac structure taking with the help of ANSYS code are presented.
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