THE OBSERVATION ANALYSIS FOR THE SUBTYPES OF FAST FINE STRUCTURES OF SOLAR MICROWAVE RADIO RADIATION

29 fast fine strUCtUres (FFS) were found after analizing lO3 edo bUrStS observedfr0m Janump l990 t0 January l994 with the 4-frequency (l.42, 2'l3, 2.84 and 4.26Gth) solar rado high temPoral resolution synchron0us system at Yunnan Observatory.SPecially, 2 rare subtyPes of the FFS, i.e. narrow-band Period vmping Pulsation andwideband slowly drifting long-periodic Pulsahon were found. 0ne occuered ddring theimPulsive Phase 0f flare and the other during the decaying Phase- Ths shows thatcoronal nonthermal electr0n anceleration / injechon process may go through the wholedevelopment process of flares. ndo FFS may be regardd as the evidence ofndcarenergy release of flares, and resulhng from the nonthermal electron acceleration /injechon. The many information abollt the ndcmtwta of the hme and sPaCe inflares asceleration mechhosm may be extheted from FFS. Genetally, the basic processof energy release is the illtomehon betWeen different magnehc stfUCbes, and hencethere may exist the magnehc reconnechon in the POst Phase of flare and the refondngof loop-like strUctures (Postflare loops) by the existence of FFS of the post Phase offlares.The unusual subtypes of FFS introduced here may reflect the specific environmntal conditions existing in corona even though their radation mechanism is the same as the basic types of FFS. Some complex and multi-type magnetic structures in coronamay be suggested by the various subtypes of FFS.