[en] We have experimentally studied the correlation between the 3/2ß0 emission of radiation and the generation of super-fast ions (>=MeV) which we have observed for the first time. It was found that the generation of the super-fast ions are correlated with the appearance of the filamentary structure in the spatial distribution of the 3/2ß0 emission. We will show that the super-fast ions are generated by the acceleration due to the ambipolar field of super-hot electrons which are produced in the small scale filaments in the underdense plasma near the quarter critical density. (author)