RuPAC2016 - List of Authors (Altsybeyev, V.V.)

Paper	Title	Page
WECAMH05	Optimization and Simuations of Beam Dynamics in APF Accelerators	70
	D.A. Ovsyannikov, V.V. Altsybeyev Saint Petersburg State University, Saint Petersburg, Russia
	Design problem of APF accelerator for ensurance enough high quality of output beam is considered. As we know, this problem is not easy because we have to achieve stability of longitudinal and transversal motions simultaneously. One of the first significant results in this subject were obtained by V. V. Kushin. In this work the problems of optimizations of intense ion beam are considered. The optimazation approaches for some beam characteristics improving (acceleration and transmission rates) are considered. Obtained results are confirmed by particle in cell simulations.
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TUPSA062	Modeling of Triode Source of Intense Radial Converging Electron Beam	336
	V.V. Altsybeyev, V.I. Engelko, A.D. Ovsyannikov, D.A. Ovsyannikov, V.A. Ponomarev Saint Petersburg State University, Saint Petersburg, Russia R. Fetzer, G. Müller KIT, Karlsruhe, Germany
	The considered source of triode type produces intense radial converging electron beam for irradiation of cylindrical targets. As an electron emitter an explosive plasma cathode is used. The role of initial transverse velocities of electrons, defocusing effect of the controlling grid, the beam self-magnetic field, electron and ion emission from the controlling grid, backscattering of electrons and ion flow from the target is analyzed. Conditions for achieving required electron beam parameters (the electron kinetic energy - 120 keV, the beam energy density on the target 40 J/cm² on a maximum possible length of the target surface) were determined.
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WEPSB001	Particle Swarm Method for Optimization of Special RFQ Channel
	V.V. Altsybeyev, D.A. Ovsyannikov Saint Petersburg State University, Saint Petersburg, Russia A.P. Durkin MRTI RAS, Moscow, Russia Y.A. Svistunov NIIEFA, St. Petersburg, Russia
	Particle swarm method is used for optimization of special RFQ channel. There is a considered possibility of separate preacceleration of the multicharged ions with the different A/Z ratios in single radio-frequency quadrupole (RFQ) channel. Magnitude of the injection energy into RFQ is about a few keV/u, magnitude of the injection energy into booster or following linac cascade are 300 keV/u. Aim of optimization to change regular part of RFQ or matching section profile to improve outut parameters of the beams particles, such as current, emittance, phase width, etc. Phase ellipses of the beams partiles on input RFQ may be arbitrary oriented in phase space. In this case particle swarm method is effictive enough for optimizations.
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WEPSB013	On Approach for Resonant Frequency Tuning in Drift Tube Structures on the Designing Stage	386
	I. Skudnova, V.V. Altsybeyev Saint Petersburg State University, Saint Petersburg, Russia
	Current research considers the interdigital H-mode linear resonant accelerator with drift tubes mounted inside the cavity. The focus of the study has been on the dependence of resonant frequency on the parameters of the geometry. Since Alternating-Phase-Focusing (APF) type of accelerator is investigated, the efficiency of the operation depends on the synchronization of the charged particle velocity and accelerating field oscillations. Researchers can control it by the variation of longitudinal size of the cells of the structure (periods). On the other hand, the effective performance of the resonant system requires the equality of resonant frequencies of its cells, because it affects the uniformity of accelerating field distribution along the axis. The diversity of cells longitudinal sizes causes the deviation from the particular value of the resonant frequency. This aberration can be eliminated by the adjustment of other geometry parameters: period's length, gap ratio and drift tube diameter. We have conducted the study to analyze the relation between resonant frequency and these values. Using the this dependency we can tune the geometry parameters of each period in the structure. We first create the computer-aided design (CAD) geometry model of the accelerator cavity. Then, using Comsol Multiphysics, the platform for physics-based modeling and simulation, we conduct the calculation of resonant frequencies.
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Paper

Title

Page

Optimization and Simuations of Beam Dynamics in APF Accelerators

70

D.A. Ovsyannikov, V.V. Altsybeyev
Saint Petersburg State University, Saint Petersburg, Russia

Design problem of APF accelerator for ensurance enough high quality of output beam is considered. As we know, this problem is not easy because we have to achieve stability of longitudinal and transversal motions simultaneously. One of the first significant results in this subject were obtained by V. V. Kushin. In this work the problems of optimizations of intense ion beam are considered. The optimazation approaches for some beam characteristics improving (acceleration and transmission rates) are considered. Obtained results are confirmed by particle in cell simulations.

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSA062

Modeling of Triode Source of Intense Radial Converging Electron Beam

336

V.V. Altsybeyev, V.I. Engelko, A.D. Ovsyannikov, D.A. Ovsyannikov, V.A. Ponomarev
Saint Petersburg State University, Saint Petersburg, Russia
R. Fetzer, G. Müller
KIT, Karlsruhe, Germany

The considered source of triode type produces intense radial converging electron beam for irradiation of cylindrical targets. As an electron emitter an explosive plasma cathode is used. The role of initial transverse velocities of electrons, defocusing effect of the controlling grid, the beam self-magnetic field, electron and ion emission from the controlling grid, backscattering of electrons and ion flow from the target is analyzed. Conditions for achieving required electron beam parameters (the electron kinetic energy - 120 keV, the beam energy density on the target 40 J/cm² on a maximum possible length of the target surface) were determined.

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSB001

Particle Swarm Method for Optimization of Special RFQ Channel

V.V. Altsybeyev, D.A. Ovsyannikov
Saint Petersburg State University, Saint Petersburg, Russia
A.P. Durkin
MRTI RAS, Moscow, Russia
Y.A. Svistunov
NIIEFA, St. Petersburg, Russia

Particle swarm method is used for optimization of special RFQ channel. There is a considered possibility of separate preacceleration of the multicharged ions with the different A/Z ratios in single radio-frequency quadrupole (RFQ) channel. Magnitude of the injection energy into RFQ is about a few keV/u, magnitude of the injection energy into booster or following linac cascade are 300 keV/u. Aim of optimization to change regular part of RFQ or matching section profile to improve outut parameters of the beams particles, such as current, emittance, phase width, etc. Phase ellipses of the beams partiles on input RFQ may be arbitrary oriented in phase space. In this case particle swarm method is effictive enough for optimizations.

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSB013

On Approach for Resonant Frequency Tuning in Drift Tube Structures on the Designing Stage

386

I. Skudnova, V.V. Altsybeyev
Saint Petersburg State University, Saint Petersburg, Russia

Current research considers the interdigital H-mode linear resonant accelerator with drift tubes mounted inside the cavity. The focus of the study has been on the dependence of resonant frequency on the parameters of the geometry. Since Alternating-Phase-Focusing (APF) type of accelerator is investigated, the efficiency of the operation depends on the synchronization of the charged particle velocity and accelerating field oscillations. Researchers can control it by the variation of longitudinal size of the cells of the structure (periods). On the other hand, the effective performance of the resonant system requires the equality of resonant frequencies of its cells, because it affects the uniformity of accelerating field distribution along the axis. The diversity of cells longitudinal sizes causes the deviation from the particular value of the resonant frequency. This aberration can be eliminated by the adjustment of other geometry parameters: period's length, gap ratio and drift tube diameter. We have conducted the study to analyze the relation between resonant frequency and these values. Using the this dependency we can tune the geometry parameters of each period in the structure. We first create the computer-aided design (CAD) geometry model of the accelerator cavity. Then, using Comsol Multiphysics, the platform for physics-based modeling and simulation, we conduct the calculation of resonant frequencies.

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)