No abstract available

[en] A multicomponent liquid scintillator solution for use as a radiation-to-light converter in conjunction with a fiber optic transmission system. The scintillator includes a quantity of 5amino-9-diethylaminobenz (A) phenoxazonium nitrate (Nile blue nitrate) as a solute in a fluor solvent such as benzyl alcohol. The use of ppd as an additional solute is also disclosed. The system is controllable by addition of a suitable quenching agent, such as phenol

[en] Plasma effects on the emission of synchrotron radiation are investigated using a two-dimensional electromagnetic relativistic simulation code. Results are compared with those for a vacuum; it is found that the emission lies between the vacuum emission for nsub(c) and nsub(c) + 1 where nsub(c) is the critical harmonic for EM wave propagation (nsub(c) = νsub(p)/Ω⁰). (author)

[en] A formulation for computation of a class of collision-free plasmas in two dimensions is derived. (author)

[en] In the present report the role of the fission-fusion hybrid reactor in nuclear power generation is enlightened. Some characteristics of reactor physics studies with 14-MeV neutrons (fusion neutronics) are given. The features of fusion neutronics concerned with the requirements to nuclear data and calculation techniques are mentioned. Experimental methods and their application to blanket models of fusion and fission-fusion hybrid reactors are pointed out. (author)

[en] With the TASKA-study it could be demonstrated, that, in a tandem mirror based test facility with a thermal barrier, all necessary technical components can be integrated into one system. As a result important technologies have been developed and studied for a demonstration fusion reactor system. This could be achieved with a set-up of acceptable size and relatively low cost compared with similar test facilities (INTOR). (orig.)

[en] Neutral beam development for JET injectors at FAR laboratory has led to the study of properties of a single stage (triode) and a two-stage (tetrode) multi-aperture extraction system at ion beam powers exceeding the megawatt level and up to 80 keV beam energy. The results of the experimental measurements and of a numerical study of the beam optical qualities and grid power loadings of these systems are presented. Grid power loading levels of less than 1% of the high-voltage drain power were measured in both the triode and the tetrode accelerators. This would allow long pulse operation (10 s with water-cooling) as required for JET. The beam divergence angle (α approx.= 0.7₀) and the transmission characteristics were almost identical. At the same energy, higher current densities, at optimum perveance, were obtained with the triode at a lower electric field stress on the high-voltage gap. The triode offers the additional advantage of being simpler from the mechanical and electrical points of view. Operation of the injection line with an electrostatic beam dump associated with a grounded source is also demonstrated for a 25 A ion beam up to 60 keV. (orig.)

[en] The free energy associated with the anisotropy in the velocity space of a microwave-heated hot electron distribution can drive the mirror mode unstable. The real frequency of this instability is of the same order as the diamagnetic drift frequency of the hot electrons

[en] A means of obtaining approximate dispersion relations for long wavelength magnetoacoustic surface waves propagating in a magnetically structured atmosphere is presented. A general dispersion relation applying to a wide range of magnetic profiles is obtained, and illustrated for the special cases of a single interface and a magnetic slab. In the slab geometry, for example, the dispersion relation contains both the even (sausage) and odd (kink) modes in one formalism

[en] Two modes of low-frequency oscillations have been observed in the central cell of the tandem mirror experiment (TMX). A mode at about 7 kHz has m = 1 and probably drives radial transport at large radii. The mode identification is uncertain. A mode at about 13 kHz has m = 0. The two end plugs oscillate 180₀ out of phase with each other and in phase with the amplitude (envelope) of the ion cyclotron frequency oscillations in each plug. This mode is identified as a sound wave; the frequency is apparently locked to the E x B rotation frequency, probably through an associated m = 1 component. Neither mode severely limits confinement in the central cell, and both may be controllable. The lower-frequency mode is sensitive to the density profile and to the fueling and is not always present. The higher-frequency mode may be less important (or absent) in devices in which the plugs are stable at the plug's ion cyclotron frequencies