  We study the production of charginos and sneutrinos in electron-photon
collisions within the minimal supersymmetric standard model (MSSM). The high
energy photons can be generated by Compton backscattering of intense laser
pulses off one of the beams of the Next Linear Collider (NLC). This process
could offer a significant opportunity to identify sneutrinos, which exclusively
decay invisibly into a neutrino and the LSP, since the cross sections are two
orders of magnitude higher than for the radiative production of invisible
sneutrinos. For three scenarios of gaugino-higgsino mixing the cross sections
and polarization asymmetries are computed and the resulting signatures are
compared with the SM background.
