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Mikhailichenko, A.A.

Paper Title Page
MPPT034 Field Modelling for the CESR-c Superconducting Wiggler Magnets 2336
 
  • J.A. Crittenden, A.A. Mikhailichenko, A. Temnykh
    Cornell University, Department of Physics, Ithaca, New York
  • E.N. Smith, K.W. Smolenski
    Cornell University, Ithaca, New York
 
  Funding: National Science Foundation.

Superconducting wiggler magnets for operation of the CESR electron-storage ring at energies as low as 1.5 \gev have been designed, built and installed in the years 2000 to 2004. Finite-element models of field quality have been developed, various sources of field errors investigated and compared to field measurements. Minimization algorithms providing accurate analytic representations of the wiggler fields have been established. We present quantitative descriptions of field modelling, of measured field quality and of the accuracy achieved in the analytic functions of the field.

 
MPPT061 Ideal Wiggler 3511
 
  • A.A. Mikhailichenko
    Cornell University, Department of Physics, Ithaca, New York
 
  Described is the wiggler with reduced nonlinear components for usage in damping ring of Linear Collider. Zigzag field dependence on longitudinal coordinate made by profiling of poles.  
MPPT063 Optimized Analyzing Magnet for Measurements of Polarization of Gamma-Quants at 10 MeV 3582
 
  • A.A. Mikhailichenko
    Cornell University, Department of Physics, Ithaca, New York
 
  We described here calculations and test of magnet for measurement of polarization of gammas by its helicity-dependent attenuation in magnetized iron. Magnet is a compact device which size is ~ten times smaller, than world wide analogues.  
MPPT064 Elements of Magneto-Optics Acting in One Direction 3618
 
  • A.A. Mikhailichenko
    Cornell University, Department of Physics, Ithaca, New York
 
  We describe here the way to use quadrupole, octupole lenses so they are acting in one direction only. The beam is running across the lens in contrast with usual axis running.  
MPPT066 Pulsed Undulator for Polarized Positron Production 3676
 
  • A.A. Mikhailichenko
    Cornell University, Department of Physics, Ithaca, New York
 
  We represent here elements of design and results of testing for helical undulator with ~2.5-mm period, manufactured in Cornell LEPP for polarized positron production at SLAC. At 2.3 kA undulator reaches K~0.2 and operated up 30 Hz.  
TPAE011 Fast Sweeping Device for Laser Bunch 1219
 
  • A.A. Mikhailichenko
    Cornell University, Department of Physics, Ithaca, New York
 
  Electro-optical laser sweeping device deflects the head and tail of laser bunch into different frontal directions, so at some distance, the laser bunch becomes tilted with respect to forward direction. For sweeping of laser bunch having 300 ps duration up to 10 mrad, the voltage drop along the laser bunch must be ~10kV. Repetition rate desirable for this type of device used in laser acceleration or generation of secondary back-scattered electrons is up to 1 MHz. Details of the scheme described here.  
TPAT086 Enhanced Optical Cooling of Particle Beams in Storage Rings 4179
 
  • E.G. Bessonov
    LPI, Moscow
  • A.A. Mikhailichenko
    Cornell University, Department of Physics, Ithaca, New York
 
  In this scheme undulators are installed in straight sections of a storage ring at distances determined by a phase advance 2pπ+π between first and second undulators and 2π between next undulators, where p=1,2,3.. . UR emitted in the first undulator pass through an optical system with movable screens 1,2 in the image plane of the particle beam. If screens let pass the UR then the past UR is amplified and pass through the second and next undulators together with the particle. Every particle loses its energy in the overlapped fields of the amplified UR and these undulators. Motion of screens in the optical system leads to particle energy losses in second and following undulators similar to losses in moving targets T1,2 in the schemes of enhanced ion cooling.* Energy losses are accompanied by a decrease of both energy spread and amplitudes of betatron oscillations that is enhanced cooling if, at first, the moving screen 2 will produce conditions of the energy loss for higher energy particles. When the screen 2 will open image of all particles the system must be closed and then the cooling process can be repeated*.

*physics/0404142.

 
TOPA011 Self Consistent Scheme for Obtaining Electron-Positron Collisions with Multi-TeV Energy 740
 
  • A.A. Mikhailichenko
    Cornell University, Department of Physics, Ithaca, New York
 
  We describe here a self-consistent scheme for arrangement of multi-TeV collisions of electrons and positrons by using laser burst swept along microstructures with stable rate of acceleration ~10GeV/m. Shown that all component of the scheme are within present day technology. For energy ~1TeV luminosity could reach 1035 /cm2/s with wall-plug power of few tens of kW only.