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[en] The Super-X Divertor (SXD), a robust axisymmetric redesign of the divertor magnetic geometry that can allow a fivefold increase in the core power density of toroidal fusion devices, is presented. With small changes in poloidal coils and currents for standard divertors, the SXD allows the largest divertor plate radius inside toroidal field coils. This increases the plasma-wetted area by 2-3 times over all flux-expansion-only methods (e.g., plate near main X point, plate tilting, X divertor, and snowflake), decreases parallel heat flux and hence plasma temperature at plate, and increases connection length by 2-5 times. Examples of high-power-density fusion devices enabled by SXD are discussed; the most promising near-term device is a 100 MW modular compact fusion neutron source 'battery' small enough to fit inside a conventional fission blanket.
[en] A significant laser-induced piezooptical response in novel CdCl0.5J 0.5 nanolayers is obtained under the influence of laser illumination. The maximal piezo-optic response is observed for off-diagonal piezooptical tensor components. The layered structure allowed to obtain the thin specimens of thickness up to 1 nm with mirror-like surfaces. The observed studies show huge dependence of the piezooptics on the nanolayer thickness and the photoinduced beam power density. The effect is completely reversible. This fact allows proposing a new type of nanomaterials, which have significant benefits with respect to the other types of piezooptical materials (i.e. a possibility to use them in the laser operated devices). (paper)
[en] CNSKINO - a user friendly code for the quick assessment of nuclear reactor kinetics problems. The calculation of reactor power is based on effective solving point-kinetics equations by using third-order Hermite polynomial approximations of reactor power and analytical integration of delayed group precursor equations at every finite time step of the process. Problems of fast transient processes caused by reactivity accidents and slow transients for different type of reactors can be successfully evaluated using CNSKINO code. The CNSKINO is written in the algorithmic Turbo Pascal for Windows language. (author). 4 refs., 9 figs., 1 tabs
[en] This paper reports on a method to optimize an electromagnetic energy harvester converting the low-frequency body motion and aimed at powering wireless body area sensors. This method is based on recorded accelerations, and mechanical and transduction models that enable an efficient joint optimization of the structural parameters. An optimized prototype of 14.8 mmØ × 52 mm, weighting 20 g, has generated up to 4.95 mW in a resistive load when worn at the arm during a run, and 6.57 mW when hand-shaken. Among the inertial electromagnetic energy harvesters reported so far, this one exhibits one of the highest power densities (up to 730 μ W cm−3). The energy harvester was finally used to power a bluetooth low energy wireless sensor node with accelerations measurements at 25 Hz. (paper)
[en] Rotational fuel shuffling was tried in the burning wave fast reactor concept with movement of burning wave for radial direction to make the stable radial power density profile. The result of preliminary analysis showed the possibility to achieve it. It is possible achieve equilibrium condition with almost constant excess reactivity and stable power density profile in the core. (author)
[en] Requirements on detector and cable are defined, tests are described, and rules for the physical design of the measuring system are stated. The standard has to be equivalently applied to other instrumentations if used in place of the neutron fluence rate for determination of the power density or the power density distribution. (orig./HP)
[de]Es werden Anforderungen an Detektor und Kabel formuliert, Pruefungen beschrieben und Richtlinien fuer die physikalische Auslegung des Messsystems gegeben. Die Norm gilt sinngemaess fuer andere Instrumentierungen, falls sie anstelle der Neutronenflussdichte zur Ermittlung der Leistungsdichte bzw. Leistungsdichteverteilung verwendet werden. (orig./HP)
[en] In this study, a naphtho-p-quinodimethane (QDM) exhibiting Baird’s 4n - π antiaromaticity was used as green photonsharvesting chromophore to sensitize perylene (Per) leading to upconverted blue photoluminescence. The solution phase QDM → Per triplet energy transfer (TET) could not be unraveled via the Stern-Volmer method, but transient absorption measurements revealed that the kinetics of T1 → Tn for QDM (τ = 1.4 μs) was 1 order of magnitude reduced (τ= 0.17 μs) as a result of 3(Per)* formation. Lastly, we demonstrated that incident light with power densities in the microwatt regime is sufficient to perform photon upconversion using the present set of molecular systems.