Analysis or ferroelectric emission using initial energy effects

Summary form only given. A new theory is proposed to explain emission from a ferroelectric cathode using a non-zero initial (kinetic) energy for the electrons emitted from the cathode. The traditional Child-Langmuir limit on current density has been exceeded by most ferroelectric cathode experiments. Ferroelectric emission is inherently from electrons which have been ejected from a cathode with non-zero initial energy. Thus one can question the applicability of the Child-Langmuir limit (which is derived on the assumption that electrons are emitted from the cathode with no initial energy) to explain ferroelectric emission. The new theory proposed here shows that if initial energy is taken into account then we can justify the higher current densities observed in ferroelectric cathode experiments.