THE X-RAY-EUV SPECTRUM OF OPTICALLY THIN PLASMAS

The new observations of the Extreme Ultraviolet Explorer Spectrometers on EUVE and the future high resolution observation by Coronal Diagnos tic Spectrometer (CDS) and SUMER on SOHO have suggested the revision o f the Xray-EUV spectral code of the authors (1990) for optically thin plasmas. More accurate atomic data computations are now available and several lines have been added. Work is in progress to update the Xray- EUV cods following the suggestions of the reviewers of the workshop on ''Atomic data assessment for SOHO'' hold in Abingdon (March 1992). Sp ecial care is given to the highly ionized iron lines in the EUV spectr al region.