Coherent Bremsstrahlung at Beijing Electron-Positron Collider
DING Yi-bing1,3, V. G. Serbo2,3
1Graduate School, University of Science and Technology of China at Beijing,
2Chinese Academy of Sciences, Beijing 100039
Novosibirsk State University, 630090 Novosibirsk, Russia
3Department of Physics, University of Milan, INFN, 20133 Milan, Italy
Coherent Bremsstrahlung at Beijing Electron-Positron Collider
DING Yi-bing1,3;V. G. Serbo2,3
1Graduate School, University of Science and Technology of China at Beijing,
2Chinese Academy of Sciences, Beijing 100039
Novosibirsk State University, 630090 Novosibirsk, Russia
3Department of Physics, University of Milan, INFN, 20133 Milan, Italy
Abstract： The main characteristics of coherent bremsstrahlung (CBS) for the Beijing Electron-Positron Collider are calculated. At this collider dNγ~3 x 108 dEγ/Eγ photons of CBS will be emitted for a single collision of the beams in the energy range Eγ< 240 eV. It seems that CBS can be a potential tool for optimizing collisions and measuring beam parameters. Indeed, the bunch length σz can be found from the CBS spectrum because critical energy Ec ∝ 1/σz; the horizontal transverse bunch size σx is related to dNγ∝1/σx2. In addition, CBS may be very useful for a fast control over an impact parameter R between the colliding bunch axes.
1999, Vol. 16 
