[en] A scheme for computing the steady state transport of neutral atoms in cylindrical plasmas is described. The physical model used represents atoms emerging from charge exchange collisions by an isotropic source of neutrals with energy equal to 3/2 times the local ion temperature. The processes of charge exchange and impact ionization by electrons and ions are included. The transport can be described by an integral equation for the charge exchange collision density, and this equation approximated by a set of algebraic equations for the zone average collision densities. A derivation of the appropriate kernel and a technique for computing it are presented. Comparison of computed results with predictions of other, more exact codes exhibit quite satisfactory agreement for temperature as high as 10 keV

[en] Brief discussions of the following topics are given: (1) current rise and preheating; (2) beam heating to ignition; (3) transition to burn; (4) burn; and (5) shutdown

[en] This letter contains a summary of recent physics results that has direct bearing on the scientific feasibility of the Riggatron reactor concept. It includes results on the effects of the buildup of impurities, magnetic field ripples, control of the burn, and the transition from ignition to reactor burn parameters

[en] The purpose of this note is to set down the Pfirsch-Schlueter and classical transport coefficients used in G2M. The argument used is due to Hazeltine and Hinton (Phys. Fluids, 16:1833(1973)), and the results of course agree with theirs

[en] The MAK1 code has been upgraded in each of the following areas: (1) numerics; (2) pellet refueling module; (3) neutral beam modules; (4) transport modules; and (5) control modules

[en] In ETF it is desired to maintain burn parameters of anti T/sub i/ approx. = to 12 keV, anti n/sub H/ approx. = to 10²⁰/m³, P/sub n/ approx. = to to 1100 MW constant over a period nominally of about 500 sec. This clearly will require some feedback control mechanism since, left to its own, the equilibrium operating-point temperature would rise to an unacceptably high value thus leading to unstable values to β, large synchrotron emission, and a rapid buildup to He ash. It has been proposed that the burn may be effectively controlled by adding ripple to the confining toroidal field. In this note we investigate this possibility coupled with maintaining the density with pellet injection

[en] The analytical methods being used to support the EPRI dosimetry program are discussed. Results from a study of radiation environments are presented and compared with similar data from the NSSS vendors. Current work in process is also discussed

No abstract available

No abstract available

[en] The cyclotron radiation spectra from runaway tokamak discharges are discussed and numerical studies reported which attempt to fit the observed data with simple model distribution functions. A model is exhibited which is both physically reasonable and in qualitative agreement with experiment. A tentative attempt is made to compare this result with the theory for runaway dynamics of Parail and Pogutse. It is found that a consistent picture can be formulated if some assumptions are made concerning initial breakdown conditions