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sextupole

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TUCHX03 Crab Waist Approach: from DAΦNE to SuperB luminosity, emittance, factory, collider 6
 
  • M. Zobov
    INFN/LNF, Frascati (Roma)
  The crab waist collision scheme (CW) was proposed and successfully tested at the Phi-factory DAΦNE. At present this scheme is considered to be most attractive for the next generation lepton factories. In particular, the novel scheme is a key element of the SuperB project, a new SuperB-factory with a luminosity about two orders of magnitude higher than that achieved at the present B-factories (KEKB and PEPII). In this paper we summarize the results achieved at DAΦNE after implementation of the CW collision scheme and discuss the status of the SuperB project.  
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TUPSA001 Compensation of Nonlinearities in NICA Collider Optics collider, proton, lattice, dynamic-aperture 35
 
  • S. A. Kostromin, O. S. Kozlov, I. N. Meshkov, V. A. Mikhailov, A. O. Sidorin, G. V. Trubnikov
    JINR, Dubna, Moscow Region
  • V. A. Lebedev
    Fermilab, Batavia
  • Y. Senichev
    FZJ, Jülich
  Intra-beam scattering is the limiting factor of the luminosity lifetime for Nuclotron-based Ion Collider fAcility (NICA). To minimize IBS growth the dispersion should be lowered as much as possible. Due to this fact and rather long dispersionless straight sections with two IPs the normalized chromaticity reaches a high value ~4. Therefore the strong chromatic sextupoles magnets on arcs are required which in turn bring significant non-linear distortions in beam dynamics. Different schemes involving several families of sextupoles and are tested. Optimization of the chromaticity correction scheme was carried out to increase the dynamic aperture. Use of octupole correctors was studied to compensate the nonlinearities from sextupole magnets and minimize the non-linear tune shift in region of beam. Obtained design of the NICA collider lattice was used for the long term tracking to understand the beam transverse parameters behavior.  
 
WEPSB022 Nonlinear Electron Beam Dynamics with Large Energy Spread in the Magnetic Mirror electron, linac, quadrupole, dipole 212
 
  • Y. A. Fomin, V. Korchuganov
    RRC, Moscow
  One of the features of new injection system for Kurchatov source of synchrotron radiation is an energy doubling of electron beam in forinjector – linear accelerator. The magnetic mirror provides 180° turn of electron beam into acceleration structure of linac for twice beam energy increase. This paper describes linear and nonlinear electron beam dynamics with energy 80 MeV and large energy spread in the magnetic mirror. The theoretical first- and second order optical functions of the magnetic mirror and the results of computer simulation of electron beam trajectories taking into account large energy spread and curvature of trajectories are presented. The structure of the magnetic mirror providing the achromatic and isochronous 180° turn of electron beam with 7% energy spread is suggested. Mutual influence of “the head” and “the tail” of electron beam when colliding in a straight section spaced in between linac output and magnetic mirror on particle losses and on the longitudinal and transversal parameters are considered.  
 
THCHC02 Development of Fast-Cycling Superconducting Quadrupole and Corrector Magnets for the SIS 300 quadrupole, multipole, dipole, resonance 300
 
  • L. Tkachenko, I. Bogdanov, S. Kozub, P. A. Shcherbakov, I. Slabodchikov, V. Sytnik, V. Zubko
    IHEP Protvino, Protvino, Moscow Region
  Funding: Rosatom, contract Н.4е.45.03.10.1027

IHEP participates in the development of superconducting fast-cycling magnets for the FAIR project. In the frame of this project IHEP has developed a prototype of the main quadrupole, assigned for using in the SIS300 ring. The main parameters of the quadrupole are: 45-T/m central gradient in 125-mm ID of the coil with the useful aperture of 105 mm; the gradient ramp rate is 10 T/m/c and the length of the prototype is 1 m. The main characteristics of the designed quadrupole magnet are discussed here. The correction system consists of multipole magnets, resonance and chromaticity sextupoles and steering dipoles. The multipole magnet contains octupole, sextupole and quadrupole coils and the steering magnet involves horizontal and vertical dipoles. Geometries of corrector and steering magnets are presented as well as their main magnetic parameters.

 
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