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Results are given for tangential injection into ATC of two 15-keV neutral beams with net power up to 100 kW. The ion temperature rise exceeds 100 eV, consistent with theoretical expectations. Fast-ion drag rates and pitch- angle scattering have been measured, the latter to determine Z/sub eff/. Injection was also made at 83 and 97$sup 0$ to the plasma current. At 83$sup 0$ some ion heating is observed; at 97$sup 0$ the heating is negligible. The fast- ion energy distributions, observed tangentially, show the severity of the ''loss- region'' for counter-circulating particles. (auth)

The method of "self-similar solution of partial differential equations" is introduced and applied to the distributed RGC network. For linear networks convolution integrals, V(x,t) = V_{\delta} \times V_{source} and V(x,t) = V_{\delta'} \times I_{source} are obtained where V_\delta and V_\delta' are, respectively, the responses to the \delta function voltage and current sources found and from the self-similar analysis, and V_source and I_{source} \propto \partial V_{source}/\partial x are arbitrary voltage and current sources. For certain sources, these integrals have been performed and the results will be presented. The technique is also successfully applied to nonlinear networks which are useful in modeling various microelectronic circuit components.

Gross properties of the energy balance in the ATC tokamak have been investigated. During the quasi-steady state phase of a normal discharge, the major part of the energy loss vas found to be to the limiters. Radiation and charge-exchange play minor roles during this quasi-steady state phase, but are nevertheless the dominant loss mechanisms at the termination of a discharge and account for a substantial portion of the stored poloidal magnetic energy associated with the plasma current.

The plasma flow velocity into the divertor chamber of the FM-1 Spherator is determined by measuring the propagation velocity of ion acoustic waves. The observed parametric dependence of plasma flow into the divertor is consistent with the plasma sheath model, which is now frequently used for designing poloidal divertor devices.

An equivalence relation of a family of arrays defined under a linear transformation is established. By means of this theorem, the far field of an elliptical array can be obtained from that of an equivalent circular array; the theorem can be similarly applied to two- and three-dimensional arrays. A uniformly excited cophasal elliptical array is considered as an example. For nonuniform excitation, the method of symmetrical components may be applied despite the absence of axial symmetry for elliptical arrays. This theory can also be applied to the case of continuous source distribution on an ellipse or in an elliptical aperture. In so doing, solutions can be obtained without use of the complicated wave functions pertaining to the original geometry. As an example, an optimum array in the sense of Dolph-Chebyshev is considered. Similarly, a Taylor distribution for an elliptical aperture can be achieved.

Gross properties of the energy balance in the ATC tokamak have been investigated. During the quasi-steady state phase of a normal discharge, the major part of the energy loss vas found to be to the limiters. Radiation and charge-exchange play minor roles during this quasi-steady state phase, but are nevertheless the dominant loss mechanisms at the termination of a discharge and account for a substantial portion of the stored poloidal magnetic energy associated with the plasma current.

Fundamental problems of toroidal fusion devices were investigated in the FM-1 Spherator. These subjects include the transport due to drift-wave turbulence in the trapped-electron regime, poloidal divertor and impurities, and lower hybrid heating. (auth)

Magnetic compressional heating of a tokamak discharge has been demonstrated successfully in the Adiabatic Toroidal Compressor (ATC). In addition to these investigations of compressional heating, other basic measurements have been made on ATC recently. These measurements are of interest because the ATC incorporates an air-core transformer and dispenses with the usual copper shell, two features likely to be found on future larger devices with smaller aspect ratios. The following topics are discussed: (1) characteristics of the uncompressed discharges in ATC, including the dependence of $beta$/sub p/ on discharge parameters, bolometric measurements of the energy balance, measurements of the concentration of impurities; (2) MHD-behavior and attempts at stabilization of the m = 2 kink-tearing mode. (auth)