Laser interferometry for the diagnostic of nanobunches in electron-positron colliders or Shintake close-quote s monitor revisited

Small electron bunches passing through laser driven interference fringes are diagnosed thanks to Compton scattering signals. The amount of scattered light is related to both real and imaginary parts of the spatial Fourier transform of the transverse density distribution. Even and odd parts of the profile of bunches whose size compares with or is slightly smaller than the optical wavelength can be reconstructed. The size of bunches transversally much smaller than the optical wavelength can be evaluated by scanning across the fringes while varying the optical intensity. copyright 1995 American Institute of Physics