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Articles by Heinrich Hora
Total Records ( 5 ) for Heinrich Hora
  George H. Miley , Heinrich Hora , Frederick Osman , Yang Yang , Linchun Wu , Hiromo Momota and Xing Zhong Li
  A radiation source for detecting specific chemicals at several meter distance even behind walls, car doors or other barriers is the application of million electron volt (MeV) neutrons from nuclear fusion reactions at such low intensities to avoid any danger for human bodies. The chemical analysis consists in the neutron activation of nuclei emitting then gamma radiation of lines very specific for the excited nuclei. The neutron generation by the Inertial Electrostatic Confinement (IEC) has been developed to a level where very low cost neutron generators in mass production may be developed with a power supply from a normal ac plug-in or a battery. For specific chemicals e.g. the ratio of nitrogen against other elements used in all explosives, the selection of few specific gamma lines for the detectors may be of sufficiently low cost in the case of mass production.
  Frederick Osman , Peter Evans , Peter Toups , Heinrich Hora , Sebastian Glovacz and Slawomir
  Computations are to be performed using the laser driven inertial fusion energy option based on volume ignition with the natural adiabatic self-similarity compression and expansion hydrodynamics [1]. The numerical work includes the establishing of a multi-branch reaction code to be used for simultaneous fusion reactions of D-D, D-T D-He3 and mutual nuclear reaction products. This will permit the studies of neutron lean reactions as well as tritium-rich cases. The D-T reactions will stress the recent new results on one step laser fusion [2] as an alternative to the two-step fast ignitor scheme whose difficulties with new physics phenomena at petawatt laser interaction are more and more evident [3].
  Frederick Osman and Heinrich Hora
  The key problem of direct drive laser fusion is the appearance of parametric instabilities, stochastic pulsation, self-focusing (filamentation) and other anomalies. During the long years studies, the empirical and intuitively developed methods for smoothing of the laser beam were rather successful but a transparent understanding of the physics has still to be found. The first theory how the instabilities are reduced by smoothing was given recently by using PIG simulation while the suppression of the 10- picosecond stochastic pulsation by broad band laser beams was analyzed by the genuine two fluid model. A synoptic evaluation of these results is presented here where the correlation between the instabilities with the pulsation is evident. This opens new ways for direct drive laser fusion with the fundamental red laser light avoiding expensive and because of crystal defects - unsolved problems with higher harmonics production.
  Frederick Osman and Heinrich Hora
  The decay of the standard abundance distribution of elements in the Universe for heavy elements has well-known maxima near magic numbers of the nuclear shell model and deep minima in between. Combining the maxima as a generation probability on the proton number Z of the nuclides, a Boltzmann probability shows decay N(Z)=N’ exp(-Z/Z’). The result of Z’=10 has consequences on the foundation of the magic numbers, on the quark structure of the shell, and determines new higher magic numbers.
  Peter Evans , Frederick Osman and Heinrich Hora
  This study presents the characteristics of the plasma and the effect of the laser beam to best suit the plasma model behaviour. Special attention is paid to the “Genuine” Two Fluid Model and the pondermotive and transient forces. These models are translated into a numerical study of the parameters, such as the electric field density and temperature distributions once electromagnetic energy is supplied to the plasma. The parameters are presented graphically against time and distance into a small plasma fuel pellet. It is noted how field density and ions form undulations through the plasma. Types of plasma fuels are discussed with regards to their key parameters, such as density, volume and temperature. These characteristics were initially used in computations that were performed using the laser driven inertial fusion energy option based on volume ignition with the natural adiabatic self-similarity compression and expansion hydrodynamics [1].
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