The Computations And Analyses of The Physical Quantity Fields of The Flare Loops on Solar Disc

A numerical value method for dealing with the spectra possessing the characteristics of time-space series is suggested in this paper. We process the spectral data of the loops in the declining phase of a two-ribbon flare 3B taken with on H_α-SSHG at Yunnan Observatory on May 16, 1981. The optical depth(τ₀) in the center of the line H_α, the Doppler width (Δλ_D), the mean source function (Sλ), and the velocity (V₀) in line-of-sight in flare loops are carried out simultaneously from obscrvated line profile by using the non-linear least-square fitting method.Based on the numerical results, it is found that the material in the flare loops is streamed down to the chromosphere along two legs and believed that the amount of material must be supplied from the chromosphere below through chromospheric evaporation.