[IEEE The 31st IEEE International Conference on Plasma Science, 2004. ICOPS 2004. IEEE Conference Record - Abstracts. - Baltimore, MD, USA (June 28-July 1, 2004)] The 31st IEEE International Conference on Plasma Science, 2004. ICOPS 2004. IEEE Conference Record - Abstracts. - High-resolution spectroscopic X-ray diagnostics for studying the ion-lunetic energies at the stagnation of a Z-pinch plasma