Publications [#167644] of Ying Wu

Papers Published
  1. J. Zhang, C. Sun, W. Wu, J. Li, Y. K. Wu, A. W. Chao, Feasibility study of electron beam polarization measurement using Touschek lifetime, Proceedings of 2009 Particle Accelerator Conference (2009), pp. 1671-1673 .

    Abstract:
    Tou­schek scat­ter­ing is the dom­i­nant loss mech­a­nism for the elec­tron beam in a low en­er­gy stor­age ring with a large bunch cur­rent. The Duke Free-Elec­tron Laser (FEL) stor­age ring typ­i­cal­ly op­er­ates in the one-bunch or two-bunch mode with a very high bunch cur­rent and a vary­ing elec­tron beam en­er­gy as low as 250 MeV. The study of the Tou­schek life­time is im­por­tant for im­prov­ing the per­for­mance of the Duke stor­age ring based light sources, in­clud­ing the stor­age ring FELs and a FEL driv­en Comp­ton gamma source, the High In­ten­si­ty Gam­ma-ray Source. This work re­ports our life­time mea­sure­ment re­sults for few-bunch op­er­a­tion of the Duke stor­age ring. The Tou­schek loss rate is re­duced when an elec­tron beam is po­lar­ized in the stor­age ring. The change of the Tou­schek life­time can be used as a method to mon­i­tor po­lar­iza­tion of the elec­tron beam. In this work, we will also re­port our pre­lim­i­nary re­sults of the elec­tron beam en­er­gy mea­sure­ments using the res­o­nant de­po­lar­iza­tion tech­nique.