Jing Huang, Yihua Yan
National Astronomical Observatories, Chinese Academy of Sciences,
Datun Road A20, Chaoyang District, Beijing 100012, China
Solar Broadband Radio Dynamic Spectrometer (SBRS) has recorded the flare on December 1, 2004 in NOAA Active Region 10708. In the 1.100-1.340 GHz range, we presented a new fine structure with several emission stripes during the impulsive phase of the flare. Through the BEM extrapolation, we computed the magnetic field of AR 10708 during the new fine structure. The radio observations combined with hard X-ray observations, EIT observations and the magnetic field show that this new fine structure connected with the reconnection site and the motion of flare loop. After 07:15:38 UT, there were several similar groups of radio burst occurred. In the 1.100-1.340 GHz range (4 MHz in 1.25 ms), the crowded spike cluster, ``lace kind'' bursts and spike kind bursts with left polarization occurred during each group of burst. Four groups of burst occurred at the end of this flare may connected with the open magnetic field and the out flows.