Keyword: bunching
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WEPSB006 On Modeling and Optimization of Intense Quasiperiodic Beam Dynamics controls, klystron, electron, simulation 363
 
  • I.D. Rubtsova
    St. Petersburg State University, St. Petersburg, Russia
  
  The paper is devoted to quasiperiodic beam dynamics investigation. Particle density is modeled by trigonometric polynomial. Space charge field is represented in the similar form. This approach is applied to beam dynamics investigation in klystron-type buncher. Numerical algorithm of polynomial coefficients calculation from the positions and impulses of model particles is formalized. As a result Coulomb field intensity is expressed in the form of integral over the set of particle phase states. Integro-differential beam evolution model is presented. Analytical expression of the variation of beam dynamics quality criterion is obtained. It makes possible directed methods using for beam dynamics optimization.  
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WEPSB038 Multigap and Polyharmonic Bunching Systems at FLNR Cyclotrons ion, cyclotron, injection, ECR 446
 
  • I.V. Kalagin, B. Gikal, G.G. Gulbekyan, S.V. Prokhorov
    JINR, Dubna, Moscow Region, Russia
  • N.N. Pchelkin
    JINR/FLNR, Moscow region, Russia
  
  Since 1997, different variants of bunching systems have been used at the axial injections of FLNR cyclotrons to increase ions capture into acceleration efficiency. Combination of two single gap Sine and Line bunchers are used at the axial injections of U400 and DC110 cyclotrons. Since 2015, a single gap double RF harmonic buncher has been installed into the upper part of the U400M injection in addition to the lower sine buncher, the experimental results will be presented. For the HV axial injection of the new DC280 cyclotron, two variants of polyharmonic bunchers will be used: a multigap buncher and a single gap one.  
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WEPSB057 Beam Dynamics in New 10 Mev High-Power Electron Linac for Industrial Application electron, simulation, gun, linac 493
 
  • S.M. Polozov, V.I. Rashchikov
    MEPhI, Moscow, Russia
  • M.I. Demsky
    CORAD Ltd., St. Petersburg, Russia
  
  Beam dynamics simulation in electron gun, bunching and accelerating cells of new 10 Mev high-power electron linac was fulfieled with the help of developed at MEPhI SUMA * and BEAMDULAC-BL ** codes. Three-electrode electron gun was used to obtain up to 400-450 mA of pulse beam current which is necessary to produce 300 mA of the accelerated beam. Precise gun simulation was conducted to satisfy all necessary output beams characteristics, such as profile, energy spectrum, phase space size etc. Some additional calculation was conducted to provide wide range of gun output beam parameters which will be used for subsequent accelerator modification. The conventional biperiodical accelerating structure based on disk loaded waveguide was used in linac. Beam dynamics optimization was pointed to obtain effective beam bunching for all energy range and to achieve narrow energy spectrum. Simulation results shows that linac provides effective beam bunching and acceleration for wide bands of beam currents and energies.
* V.I. Rashchikov, PAST, Series: Nuclear Physics Investigations, 10 (18), p.50, 1990
** T.V. Bondarenko et al. PAST, Series: Nuclear Physics Investigations, 6 (88), p. 114, 2013 		 
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