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| TUPSA007 | Thermal Balance of Multilayered Tunable Dielectric Loaded Wakefield Accelerating Structure | acceleration, induction, vacuum, radiation | 50 | ||
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Funding: Ministry of Education and Science of Russia, “Scientific and scientific-pedagogical personnel of innovative Russia” and the Russian Foundation for Basic Research (09-02-00921) |
Thermal balance of a cylindrical tunable multilayer dielectric-filled accelerating structure is considered. One ceramic layer of the structure possesses ferroelectric properties, which allow the waveguide frequency spectrum to be tuned by varying the permittivity of the ferroelectric layer. Dielectric and induction losses in ferroelectric layer and a metal shell leads to a structure warming up and increasing temperature of the ferroelectric layer. Because of a temperature sensitivity of dielectric permittivity of ferroelectric layer this effect may detune the accelerating structure. On the basis of the analysis of a thermal regime of multilayered wakefield structure the medium and pulse temperature deviations are determined. A repetition rate of electronic bunch series should be chosen to limit temperature detuning. |
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| WEPSB023 | Electron Beam Dynamics with Space Charge in Linear Accelerator | electron, linac, acceleration, space-charge | 215 | ||
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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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| WEPSB027 | MiltP-M Code Upgrade | electron, simulation, focusing, controls | 227 | ||
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The new possibilities of MultP-M code for calculation of the multipactoring in radio frequency elements of charged particles accelerators taking into account influence of the external electric and magnetic fields are presented. Possibilities of the new module of three-dimensional display of geometry, electromagnetic fields and electron’s trajectories are shown. Example of multipactoring calculation in a transient mode in rectangular wave guide is considered
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