UNIVERSITY OF CAMBRIDGE
Department of Applied Mathematics
and Theoretical Physics
Spectral diagnostics in the EUV
Giulio Del Zanna
1 Introduction
2 Spectrometers - CDS
2.1 Wavelengths
2.2 Radiometric Calibration
3 Spectral line profiles
4 Is the plasma always optically thin ?
4.1 Absorption via photoionisation
4.2 Optical depth
5 Is the plasma always collisionally excited by electrons ?
6 Optically thin emission lines
6.1 DEM
6.2 EMs
6.3 Ionisation Fractions
6.4 Isothermal approximation
7 Filling factors
8 Density diagnostics from line intensities
8.1 Example of forbidden lines
8.2 Fe XIV
8.3 Examples
8.4 A better (global) approach
9 The electron temperature evaluation
9.1 The isothermal case
9.2 A direct method
9.3 Temperatures using the emission measure loci approach
9.4 Temperatures from imaging instruments such as TRACE and SOHO/EIT, YOHKOH/SXT
10 Abundance determination
10.1 The emission measure loci approach
10.2 The EM approximations
UNIVERSITY OF CAMBRIDGE
UNIVERSITY OF CAMBRIDGE