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AbstractAbstract
[en] Because there is no limit to the energy or power that can be delivered by a neutral-beam injector, its use will be restricted by either its cost, size, or reliability. Studies show that these factors can be improved by the injector design, and several examples, taken from mirror reactor studies, are given
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23 Nov 1977; 20 p; Plasma heating development requirements workshop; Gaithersburg, MD, USA; 5 - 7 Dec 1977; CONF-771213--1; Available from NTIS., PC A02/MF A01
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AbstractAbstract
[en] The nature of the electrical discharge has an obvious impact upon the gas efficiency of an ion source and on the current density whch can be drawn from it. However external factors, such as the conductance of the grids and the background pressure along the beamline, also have an effect. Simple approximations based upon these factors show that there is a lower limit to the pressure of an ion source, which can deliver an ion beam of given current density at a specific gas efficiency. Estimates of ion stripping losses in a double gridded structure show that for all practical purposes, there is an upper limit as well
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10 Mar 1982; 16 p; Available from NTIS., PC A02/MF A01 as DE82009302
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AbstractAbstract
[en] Value Engineering, simply defined, is a systematic approach to getting more for your money. It has been used to reduce the cost of a wide variety of products by the D.O.D. and in principle, should be applicable to various phases of the Neutral Beam Program. With respect to R and D, the principles of Value Engineering must be used with caution. They are most effective in evaluating directed development with very specific goals, but can be misleading when considering advanced innovative work
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14 May 1979; 7 p; Value engineering workshop, DOE; Germantown, MD, USA; 4 - 5 Apr 1979; CONF-790473--1; Available from NTIS, PC A02/MF A01
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Herrmann, W.; Fink, J.
Max-Planck-Institut fuer Plasmaphysik, Garching/Muenchen (Germany, F.R.)1977
Max-Planck-Institut fuer Plasmaphysik, Garching/Muenchen (Germany, F.R.)1977
AbstractAbstract
[en] The formation of electron rings and the ring behaviour just after formation are studied in a static magnetic field experiment. Particle losses and collective effects are investigated for different beam emittances, intensities and ring surroundings. The first large particle loss is connected with excessive emittance. Further losses at later times are attributed to a strong negative mass instability. This causes a spread in the energy of the electrons. At high particle numbers, if the instability is strong enough, the resulting energy and amplitude spread cannot be placed in the available space with an axial width of +- 2 cm and a radial width of +- 3 cm, and particles are lost. As the negative mass instablility reaches its maximum amplitude at the investigated beam levels only 30-50 ns after injection, an energy ramp in the injected beam might be just as suitable for reducing the negative mass instability as an energy spread. A large instantaneous energy spread, produced by foils in the beam line, enlarges the emittance of the beam drastically. (orig.)
[de]
In einem Experiment mit statischem Magnetfeld wird die Bildung eines Rings von Elektronen und das Verhalten des Rings kurz nach der Bildung studiert. Teilchenverluste und kollektive Effekte werden fuer verschiedene Strahlemittanzen, Intensitaeten und fuer verschiedene Umgebungen des Rings untersucht. Der erste grosse Teilchenverlust steht mit einer sehr grossen Emittanz in Verbindung. Weitere Verluste zu spaeteren Zeiten werden auf starke Instabilitaeten negativer Masse zurueckgefuehrt, die eine Verbreiterung der Energieverteilung der Elektronen zur Folge haben. Bei ausreichend starker Instabilitaet und grossen Teilchenzahlen kann der resultierende Energie- und Amplitudenbereich nicht mehr im verfuegbaren Raum mit einer axialen Breite von +- 2 cm und einer radialen Breite von +- 3 cm untergebracht werden, was einen Teilchenverlust zur Folge hat. Da die Instabilitaet mit negativer Masse bei den untersuchten Strahlniveaus nur 30-50 ns nach der Injektion ihre maximale Amplituden erreicht, ist eine Energierampe im Injektionsstrahl moeglicherweise ebenso zur Verminderung der Instabilitaet negativer Masse geeignet wie eine Energieaufweitung. Eine starke instantane Energieaufweitung, wie sie durch Einbringen von Folien in den Strahl erzeugt wird, hat eine drastische Vergroesserung der Strahlemittanz zur Folge. (orig.)Primary Subject
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Apr 1977; 16 p; 9 figs.; 11 refs.
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AbstractAbstract
No abstract available
Original Title
Untersuchungen zur Ladungssammlung in verschiedenen Halbleitermaterialien mittels der ''Transient Current Technique''
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Journal Article
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195; ; CODEN VDPEAZ; v. 40(4); p. 171
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ABSORPTION, CADMIUM COMPOUNDS, CHALCOGENIDES, CHARGED PARTICLES, COLLISIONS, ELECTRICAL EQUIPMENT, ENERGY RANGE, EQUIPMENT, IONIZING RADIATIONS, MATERIALS, MEASURING INSTRUMENTS, MEV RANGE, RADIATION DETECTORS, RADIATIONS, SEMICONDUCTOR DETECTORS, SORPTION, TELLURIDES, TELLURIUM COMPOUNDS, ZINC COMPOUNDS
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AbstractAbstract
[en] OAK- B135 Operators of nuclear power plants face a significant challenge in designing the partly analog and partly digital (hybrid) control rooms that will be produced at various stages of plant instrumentation and control (I and C) modernization programs. This report provides the technical material for a five-unit training class to help meet the challenge of control room modernization
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1 Mar 2003; vp; FC03-00NE22796; Available from EPRI (US)
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Fink, J.; Schilling, H.B.; Schumacher, U.
Max-Planck-Institut fuer Plasmaphysik, Garching (Germany, F.R.)1979
Max-Planck-Institut fuer Plasmaphysik, Garching (Germany, F.R.)1979
AbstractAbstract
[en] The experiments with a divided cathode in an electron beam gun, one half of which is connected via a resistor with the high voltage terminal, lead to the generation of a low emittance electron beam with instantaneously two different energies which is suitable for suppression of collective instabilities in an electron ring accelerator. The energy difference can be varied up to 100 keV proportional to the resistance, and the sub-currents are equal. The beam parts are well separated and focussed at the injection area of the compressor, and their radial distance is about equal to the radial difference of the corresponding closed orbits, such that electron ring formation with minimum radial betatron oscillations should be possible. (orig.)
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Jul 1979; 17 p
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Scheerer, B.; Fink, J.; Reichardt, W.
Progress report of the Teilinstitut Nukleare Festkoerperphysik1975
Progress report of the Teilinstitut Nukleare Festkoerperphysik1975
AbstractAbstract
No abstract available
Primary Subject
Source
Pintschovius, L. (ed.); Kernforschungszentrum Karlsruhe (F.R. Germany). Inst. fuer Angewandte Kernphysik; p. 87; Nov 1975; Short communication only. Full text published as KFK--2139.
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Progress Report
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Scheerer, B.; Fink, J.; Reichardt, W.
Kernforschungszentrum Karlsruhe (F.R. Germany). Inst. fuer Angewandte Kernphysik1975
Kernforschungszentrum Karlsruhe (F.R. Germany). Inst. fuer Angewandte Kernphysik1975
AbstractAbstract
[en] TiC single crystals were prepared by vertical zone melting for measurements of the phonon dispersion by inelastic neutron scattering. The influence of the starting material and of the growing conditions on the growth of the crystal were studied. The crystals were characterized by chemical methods, EMX and neutron diffraction. It was possible to grow single crystals with a volume of up to 0.6 cm3 and mosaic spread of less then 0.40. (orig.)
[de]
Fuer Messungen der Phononendispersion an TiC mit unelastischer Neutronenstreuung wurden Einkristalle durch tiegelfreies Zonenziehen hergestellt. In einer Reihe von Versuchen wurde der Einfluss des Ausgangsmaterials und der Ziehbedingungen auf das Kristallwachstum untersucht. Die Kristalle wurden durch chemische Methoden, Mikrosondenuntersuchungen und Neutronendiffraktion charakterisiert. Es ergaben sich Einkristalle mit einem Volumen bis zu 0,6 cm3 und einer Mosaikbreite kleiner als 0,40. (orig.)Original Title
Herstellung von TiC-Einkristallen
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Jul 1975; 18 p; 6 figs.; 2 tabs.; 11 refs.
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AbstractAbstract
[en] The nucleus is described as consisting of relativistic nucleons and explicit mesonic degrees-of-freedom which are considered to be the relativistic generalization of the Skyrme force. The meson-parameters can be adjusted such that the model gives an excellent description of spherical nuclear ground states, first axially symmetric deformed calculations are presented. Dynamic calculations of relativistic 16O-16O scattering are also done; they show pronounced effects of the mesonic degrees-of-freedom. 24 refs., 3 figs., 3 tabs
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Secondary Subject
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1986; 14 p; 18. summer school on nuclear structure studies by means of nuclear reactions; Mikolajki (Poland); 1-13 Sep 1986; Available from NTIS, PC A02; 3 as DE87005976; Paper copy only, copy does not permit microfiche production.
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