Title :
Current scaling of optimum K-shell X-ray yield and load mass applied to argon gas-puff Z-pinches
Author :
Mosher, D. ; Krishnan, M. ; Qi, N. ; Coleman, P.L. ; Waisman, E.M. ; Sze, H.
Author_Institution :
Plasma Phys. Div., Naval Res. Lab., Washington, DC, USA
Abstract :
A simple two-level radiation-scaling model has previously been shown to agree with 0.7-MA neon gas-puff and 7-MA aluminum wire-array experiments. Here, the scalings of optimum load mass and peak K-shell yield with current for argon gas puffs are compared with data over an order-of-magnitude current variation. Optimum load conditions are determined by maximizing K-shell yield subject to fixed implosion energy, resulting in peak yield and optimum mass as functions of implosion energy and stagnation radius. The scalings with current result from implosion-energy and implosion-time relations that fit double eagle nested-shell argon gas-puff results. Both the maximum-yield and optimum-mass scalings provide good absolute-value fits to the data, including the variation with implosion time.
Keywords :
X-ray production; Z pinch; argon; exploding wires; plasma diagnostics; 0.7 MA; 7 MA; Al; Ar; Ne; current scaling; gas-puff Z-pinches; implosion energy; implosion-time relations; load mass; optimum K-shell X-ray yield; optimum load mass; order-of-magnitude current variation; peak K-shell yield; stagnation radius; two-level radiation-scaling model; wire-array experiments; Aluminum; Argon; Atomic measurements; Laboratories; Parameter estimation; Physics; Plasma temperature; Plasma x-ray sources; Predictive models; Yield estimation;
Conference_Titel :
Pulsed Power Plasma Science, 2001. PPPS-2001. Digest of Technical Papers
Conference_Location :
Las Vegas, NV, USA
Print_ISBN :
0-7803-7120-8
DOI :
10.1109/PPPS.2001.1002046
