High beta capture and mirror confinement of laser produced plasmas. Final report

High beta capture and mirror confinement of laser produced plasmas. Semiannual report, February 1, 1976--June 30, 1976

“…The dashed curve gives the decay time to an electron density of 3xlol3 cm-3 for hydrogen plasmas calculated with the GAIN code and has been published in a previous progress report (Ref. 5 ) • The presence of the Li3+ ions in the multispecies plasma reduces the decay time to 3xlol3 cm-3 by a factor of 2 below the corresponding decay time for a hydrogen plas~ rna, as first pointed out by Archer Futch (Ref. 21).…”

“…Calculations now show the need for 10 keV H• neutral beam currents on the order of 20 mAjcm2 (equivalent) to achieve sustenance o~ the target R75-953100-23 C00-2277-6 plasma (see section on theoretical neutral beam injection and compare with Ref. 3).…”

“…rewritten as (3) or (4) The value of the refractive index change (1 -T)) is plotted. as a function of plasma diameter in Fig.…”

“…The analysis to be described here is a further extension of the rate equation model (Ref. 3 ), treating the plasma density as uniform within a time-de.pendent volume. The effects of migration of ion guiding centers in charge exchange with the neutral beam have been neglected.…”

“…Saturation of Getter SurfacesThe measured ca,paci ties for hydrogen sor.ption of evaporated titanium films, published in Ref.l7 have been used to estimate a time-dependent sticking probability of hydrogen on getter surfaces. As discussed in more detail in Ref 3,. the rate at which cold neutrals are pumped by the getter surfaces is a,pproximated by the product of N v 0 /4 the flux of cold neutrals on the surface and the sticking probability B.…”