Silicon Satellite Spectra from Laser-Imploded Microballoons

Abstract

electron scattering.In previous reconnection experiments anomalous resistivity has been observed and claimed to be responsible for current disruptions. 11 " 13 However, there the resistivity is calculated only from one component of the fields, i.e., the parallel induced electric field -A y and current density J y . Ignoring space charge fields and three-dimensional effects must lead to erroneous conclusions.

Radiative one- and two-electron transitions into the emptyKshell of He-like ions

“…As the paper aims to analyze the influence of relativistic configuration interaction on the transition parameters, to limit the length of the table, we have included only available relativistic data [9,20,21,23,24]. Taking into account the experimental errors, we observe that our values are in general in very good agreement with the experimental data for Be [5], B [5,6], C [5], N [5], O [5], F [20], Ne [14], Mg [3,4,7,9], Si [3,8,12,21], Ar [16], Ti [19], and Fe [13,22] and differ by a maximum of 2 eV except for Si [15] and Ti [19]. It may be mentioned here that some of the experimental energies compared in the table are either graphical representations or unresolved 3 P -3 S transition energies.…”

“…All energies in cm −1 are displayed with respect to 1s 2 In Table II we give the RCI energies of the various OEOP transitions from states of 2s2p configuration. The first row of each ion gives the present energies and the rest of the rows give the high-resolution measurements [3][4][5][6][7][8][9][12][13][14][15][16][19][20][21][22] and other calculated energies. As the paper aims to analyze the influence of relativistic configuration interaction on the transition parameters, to limit the length of the table, we have included only available relativistic data [9,20,21,23,24].…”

“…The OEOP x-ray satellites emitted from doubly excited states have been observed in laser-produced plasmas [3][4][5][6][7][8][9][10], ion-solid and ion-atom collisions [11][12][13], Z pinch experiments [14], laser-imploded microballoons [15,16], electron cyclotron ion source [17,18], tokamak [19], beam foil spectroscopy [20,21], and solar flares [22]. On the theoretical side, most of the previous data on OEOP transitions from doubly excited He-like ions are largely on nonrelativistic models, and relativistic calculations using various methods exist only for a few elements.…”

Efficient stimulated emission of ultraviolet and infrared radiation from a mixture of nitrogen and light rare gases

“…The calculation of dielectronic satellite ratios given by Lunney and Seely (1981) excludes collisional de-excitation from the doubly to singly excited states. These rates are comparable with the radiative rates for electron densities greater than lo2* ~m -~.…”

“…In a recent paper, Lunney and Seely (1981) have proposed that the ratio N(2s2p 3P)A(2s2p 3P; ls2s 3S)+ N(2p2 3P)A(2p2 3P: ls2p 3P)/N(2p2 'D2)A(2p2 'D2; ls2s 'P1) could be used as a density diagnostic for laser-produced plasmas, while Vinogradov et a1 (1975) have studied the dependence of the He-like resonance to intercombination line ratio (Y =N(2'Pl)A(2'Pl; 11So)/N(23Pl)A(23Pi; 1'So) on plasma density. However, as Weisheit et a1 (1976) point out the analysis of the line ratios should still be corrected for opacity effects before experimental data is compared with theory.…”