DocumentCode :
2414590
Title :
Low /spl eta/ scaling of K-shell emission with mass and Z
Author :
Thornhill, J.W. ; Whitney, K.G.
Author_Institution :
Div. of Plasma Phys., Naval Res. Lab., Washington, DC, USA
fYear :
1995
fDate :
5-8 June 1995
Firstpage :
256
Abstract :
Summary form only given, as follows. Because of the large amount of kinetic energy and mass needed for efficient production of K-shell emission from a high Z plasma, high Z experiments will likely take place at low /spl eta/ values. Since there has been no systematic theoretical or experimental investigation of K-shell yield scaling with mass and atomic number Z in the low /spl eta/ regime, an investigation was recently undertaken in preparation for future high Z experiments. In particular aluminum, titanium, and krypton plasmas were studied. The results of this study have identified the following problem areas: low /spl eta/ plasmas remain in an inefficient mass (or I/sup 4/) scaling regime at much higher masses than predicted by our earlier work which was based on /spl eta/>3 calculations, more energy than predicted by the earlier scaling laws will apparently be needed to obtain significant amounts of krypton K-shell emission. In addition time dependent ionization dynamics plays an increasingly important role in K-shell scaling as the Z of the load increases. The ramifications of each of these findings in terms of design of future experiments and goals are discussed.
Keywords :
aluminium; ionisation; krypton; plasma diagnostics; titanium; Al; Al plasma; K-shell emission; K-shell yield scaling; Kr; Kr plasma; Ti; Ti plasma; atomic number; high Z experiments; high Z plasma; kinetic energy; low /spl eta/ scaling; mass; mass scaling regime; time dependent ionization dynamics; Aluminum; Atomic measurements; DNA; Ionization; Kinetic energy; Laboratories; Mass production; Physics; Plasmas; Titanium;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Plasma Science, 1995. IEEE Conference Record - Abstracts., 1995 IEEE International Conference on
Conference_Location :
Madison, WI, USA
ISSN :
0730-9244
Print_ISBN :
0-7803-2669-5
Type :
conf
DOI :
10.1109/PLASMA.1995.533468
Filename :
533468
Link To Document :
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