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Fusion energy: Progress, partnerships, and the path to deployment
Over the past decade, fusion energy has moved decisively from scientific aspiration toward a credible pathway to a new energy technology. Thanks to long-term federal support, we have significantly advanced our fundamental understanding of plasma physics—the behavior of the superheated gases at the heart of fusion devices. This knowledge will enable the creation and control of fusion fuel under conditions required for future power plants. Our progress is exemplified by breakthroughs at the National Ignition Facility and the Joint European Torus.
Jan S. Brzosko, B. V. Robouch, Joanna Klobukowska
Fusion Science and Technology | Volume 12 | Number 1 | July 1987 | Pages 71-91
Technical Paper | Experimental Device | doi.org/10.13182/FST87-A25052
Articles are hosted by Taylor and Francis Online.
Experiments were carried out in the neutronoptimized mode of the plasma focus operation with small electrode diameters and condenser bank energies of 250, 390, and 490 kJ. The time sequence of the emitted radiation (neutron and gamma) was realized by the time-of-flight (TOF) method using an NE-102A plastic scintillator and silicon detectors viewing X rays from the plasma exclusively. The detectors were operated in the wide-energy window mode. Special attention was given to the interpretation of neutron TOF traces and their comparison with the absorption analysis and previously measured spectra by nuclear plates. The usefulness of gamma rays emitted by (n, n′γ) processes in electrodes is shown to be a precise indicator of the time evolution of the neutron emissivity. These conclusions are based on many shots that were statistically analyzed. Average values are discussed simultaneously with the results of representative single shots. It was found that two (sometimes more) neutron bursts are typical and, in each case, are accompanied by simultaneous hard X rays. The maxima of emissivities coincide with the dI/dt maximum. A theoretical analysis of the results reveals the existence of long time-confined streams of fast electrons and deuterons (effective energy ∼80 keV) with evidence of their slowing down.