28 research outputs found
Evaluating Lebesgue constants by Chebyshev polynomial meshes on cube, simplex and ball
We show that product Chebyshev polynomial meshes can be used, in a fully
discrete way, to evaluate with rigorous error bounds the Lebesgue constant,
i.e. the maximum of the Lebesgue function, for a class of polynomial projectors
on cube, simplex and ball, including interpolation, hyperinterpolation and
weighted least-squares. Several examples are presented and possible
generalizations outlined. A numerical software package implementing the method
is freely available online
Design and properties of silicon charged-particle detectors developed at the Institute of Electron Technology (ITE).
The paper discusses the design of charged-particle detectors commissioned and developed at the Institute of Electron Technology (ITE) in collaboration with foreign partners, used in international research on transactinide elements and to build personal radiation protection devices in Germany. Properties of these detectors and the results obtained using the devices are also presented. The design of the following epiplanar detector structures is discussed: ◆ 64-element chromatographic arrays for the COMPACT (Cryo On-line Multidetector for Physics And Chemistry of Transactinides) detection system used at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt (GSI) for research on Hassium, Copernicium and Flerovium, as well as elements 119 and 120, ◆ 2-element flow detectors for the COLD (Cryo On-Line Detector) system used for research on Copernicium and Flerovium at the Joint Institute for Nuclear Research, Dubna, ◆ detectors for a radon exposimeter and sensors for a neutron dosimeter developed at the Institut für Strahlenschutz, Helmholtz Zentrum München. The design of planar detectors - single-sided and double-sided strip detectors for the Focal Plane Detector Box used at GSI for research on Flerovium and elements 119 and 120 is also discussed