Resonant inverse Compton scattering by secondary pulsar plasma

We consider resonant inverse Compton scattering of thermal photons by secon dary particles above the pulsar polar gap. At neutron star temperatures hig her than 10(5) K the process appears to be an essential energy loss mechani sm for the particles. The distribution function of the secondary plasma par ticles is found to be strongly affected by the scattering. it becomes two-h umped implying the development of two-stream instability. The resonantly up scattered Compton photons are found to gain energy of 1-10 MeV forming an a dditional component in the pulsar gamma-ray spectrum. The corresponding gam ma-ray flux is estimated as well.