Cosmic ray particles passing through dense lower atmosphere of Venus d
ecay giving rise to various charged and neutral particles. The flux an
d degradation of dominant cascade particles namely neutrinos and pions
are computed and ionization contributions at lower altitudes are esti
mated. Using the height profile of pion flux, the muon flux is compute
d and used to estimate ionization at lower altitudes. It is shown that
cosmic ray produced ionization descends to much lower altitudes inter
cepting the thickness of Venus cloud deck. The dynamical features of V
enus cloud deck are used to allow the likely charging and charge separ
ation processes resulting into cloud-to-cloud lightning discharges.