Author: Bulyak, E.V.
Paper Title Page
TUPME056 3.5 GeV Superconducting Stacking Ring for Compton Based Polarized Positrons Source of CLIC 1697
 
  • E.V. Bulyak, P. Gladkikh, A.A. Kalamayko
    NSC/KIPT, Kharkov, Ukraine
  • T. Omori, J. Urakawa, K. Yokoya
    KEK, Ibaraki, Japan
  • L. Rinolfi, F. Zimmermann
    CERN, Geneva, Switzerland
  
  This paper de­scribes 3.5 GeV su­per­con­duct­ing stor­age ring ded­i­cated to positron ac­cu­mu­la­tion as part of a po­lar­ized positron source for CLIC, based on Comp­ton scat­ter­ing in a Comp­ton stor­age ring. The su­per­con­duct­ing stack­ing ring can pro­vide a syn­chro­tron damp­ing time of order 250 mi­crosec­onds. To­gether with com­bined in­jec­tion scheme in the lon­gi­tu­di­nal and trans­verse plane, such a ring may solve the prob­lem of ac­cu­mu­lat­ing a positron beam with ef­fi­ciency close to 95 % and with the beam in­ten­sity re­quired for CLIC.  
 
TUPWA050 Effect of Transverse Coupling on Asymmetric Cooling in Compton Rings 1823
 
  • E.V. Bulyak
    NSC/KIPT, Kharkov, Ukraine
  • J. Urakawa
    KEK, Ibaraki, Japan
  • F. Zimmermann
    CERN, Geneva, Switzerland
  
  Fast cool­ing of bunches cir­cu­lat­ing in a Comp­ton ring is achieved by plac­ing the col­li­sion point be­tween elec­tron bunches and laser pulses in a dis­per­sive sec­tion and by, in ad­di­tion, in­tro­duc­ing a trans­verse off­set be­tween the laser pulse and the elec­tron-beam closed orbit. Growth of the emit­tance in the dis­per­sive trans­ver­sal di­rec­tion due to the ad­di­tional ex­ci­ta­tion of be­ta­tron os­cil­la­tions lim­its this type of cool­ing. Here we pre­sent the re­sults of fur­ther stud­ies on the fast cool­ing process, look­ing at the ef­fect of the cou­pling of the trans­verse (be­ta­tron) os­cil­la­tions. We first show the­o­ret­i­cally that the trans­verse be­ta­tron cou­pling short­ens the cool­ing time and hence re­duces the steady-state en­ergy spread of the elec­tron beam, as well as the quan­tum losses. The the­o­ret­i­cal es­ti­mates are then val­i­dated by sim­u­la­tions. Fi­nally, a proof-of-prin­ci­ple ex­per­i­ment at the KEK ATF Damp­ing Ring is pro­posed.  
 
WEPWA060 The Kharkov X-ray Generator Facility NESTOR 2253
 
  • A.A. Shcherbakov, V.P. Androsov, N. Ayzatsky, V.N. Boriskin, E.V. Bulyak, A.N. Dovbnya, P. Gladkikh, A.N. Gordienko, V.A. Grevtsev, A. Gvozd, V.E. Ivashchenko, A.A. Kalamayko, I.I. Karnaukhov, I.M. Karnaukhov, V.P. Kozin, V.A. Kushnir, V.P. Lyashchenko, V.S. Margin, N.I. Mocheshnikov, V.V. Mytrochenko, A. Mytsykov, I.M. Neklyudov, T.F. Nikitina, F.A. Peev, O.V. Ryezayev, V.L. Skirda, V.A. Skomorokhov, Y.N. Telegin, V.I. Trotsenko, A.Y. Zelinsky, O.D. Zvonarjova
    NSC/KIPT, Kharkov, Ukraine
  • J.I.M. Botman
    TUE, Eindhoven, The Netherlands
  • I.V. Drebot
    LAL, Orsay, France
  
  The last few years the sources of the X-rays NESTOR based on a stor­age ring with low beam en­ergy and Comp­ton scat­ter­ing of in­tense laser beam are under de­sign and de­vel­op­ment in NSC KIPT. The main task of the pro­ject is to de­velop com­pact in­tense X-ray gen­er­a­tor on the base of rel­a­tively cheap ac­cel­er­a­tor equip­ment and up-to-date laser tech­nolo­gies. The paper is de­voted to de­scrip­tion of the last re­sults on con­struc­tion and com­mis­sion­ing of the fa­cil­ity.