Author: Ovsyannikov, A.D.
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WECAMH03 Analysis of the Particle Dynamics Stability in the Penning-Malmberg-Surko Trap 64
 
  • I.N. Meshkov
    JINR, Dubna, Moscow Region, Russia
  • M.K. Eseev
    NAFU, Arkhangelsk, Russia
  • I.N. Meshkov, A.D. Ovsyannikov, D.A. Ovsyannikov, V.A. Ponomarev
    Saint Petersburg State University, Saint Petersburg, Russia
  
  Present report refers to the problem of the study of charged particle dynamics in the Penning-Malmberg-Surko trap. Various models of particle dynamics describing the magnetron and cyclotron motions are considered. Representation of the solutions in the form of a series is used for the magnetron motion. The problems of the stability of the magnetron motion are investigated.  
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TUPSA015 Acceleration of Deuterons and Protons in Single RFQ Strucrure 247
 
  • A.D. Ovsyannikov, D.A. Ovsyannikov, Y.A. Svistunov
    Saint Petersburg State University, Saint Petersburg, Russia
  • A.P. Durkin
    MRTI RAS, Moscow, Russia
  
  Some aspects of acceleration of protons and deuterons in single RFQ are considered. Usually vane voltage for protons must be two times less than vane voltage for deuterons. If space charge is significant vane voltage for protons can be too small to reach high efficiency of bunching and focusing of protons beam. It is shown that a rising of voltage up to nominal value for deuterons leads to increasing of capture and transmission for protons. Another problem is concerned with a choice of radial matching section parameters, which are optimal for both beams (proton and deuterons) simultaneously. Methods of optimization are discussed. Analysis of particles dynamics is illustrated by calculation's results.  
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TUPSA017
 Modelling of Dynamic of Charged Particles in BDO RFQ Program Complex  
 
  • I.V. Antropov, V.A. Kozynchenko, A.D. Ovsyannikov, D.A. Ovsyannikov
    Saint Petersburg State University, Saint Petersburg, Russia
  
  In current work a task of modelling of dynamic of charged particles in RFQ structures in BDO RFQ program complex is considered. Following models are realized in program complex: dynamic model of particles in equivalent running wave, dynamic model of particles in the envelops and model of 3D dynamic in standing wave. Parameters export between the models is carried out. For Coulomb interaction of charged particles different models of method of large particles are carried out as well as methods based on analytic approach of Coulomb field of the beam and estimation of the Coulomb field by net method. A possibility of results comparison with Coulomb field of particles by different methods is foreseen in this program complex. User graphic interface allows to choose a model, to enter and modify the parameters, to review calculation results.  
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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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WEPSB012 On The Beam Dynamics Simulation In The Injection System 382
 
  • A.D. Ovsyannikov, S.A. Kozynchenko, V.A. Kozynchenko
    Saint Petersburg State University, Saint Petersburg, Russia
  
  When developing a particle accelerator for generating the high-precision beams, the injection system design is of importance, because it largely determines the output characteristics of the beam. At the present paper we consider the injection systems consisting of electrodes with given potentials. The design of such systems requires carrying out simulation of beam dynamics in the electrostatic fields. For external field simulation we use the new approach, proposed by A.D. Ovsyannikov, which is based on analytical approximations, or finite difference method, taking into account the real geometry of the injection system. The software designed for solving the problems of beam dynamics simulation and optimization in the injection system for non-relativistic beams has been developed. Both beam dynamics and electric field simulations in the injection system, that use analytical approach and finite difference method have been made and the results presented in this paper.  
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