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Träfflista för sökning "WFRF:(Borges F.) srt2:(2005-2009)"

Search: WFRF:(Borges F.) > (2005-2009)

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1.
  • Berciano Alba, A., et al. (author)
  • DEMON: a proposal for a satellite-borne experiment to study dark matter and dark energy
  • 2006
  • In: Proceedings of the SPIE: Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray, eds, M.J.L. Turner and G. Hasinger. ; 6266, s. 91-
  • Conference paper (other academic/artistic)abstract
    • We outline a novel satellite mission concept, DEMON, aimed at advancing our comprehension of both dark matter and dark energy, taking full advantage of two complementary methods: weak lensing and the statistics of galaxy clusters. We intend to carry out a 5000 deg2 combined IR, optical and X-ray survey with galaxies up to a redshift of z~2 in order todetermine the shear correlation function. We will also find ~100000 galaxy clusters, making it the largest survey of this type to date. The DEMON spacecraft will comprise one IR/optical and eight X-ray telescopes,coupled to multiple cameras operating at different frequency bands. To a great extent, the technology employed has already been partially tested on ongoing missions, therefore ensuring improved reliability.
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2.
  • Severo, J. H. F., et al. (author)
  • Temporal behaviour of toroidal rotation velocity in the TCABR tokamak
  • 2009
  • In: Nuclear Fusion. - : IOP Publishing. - 0029-5515 .- 1741-4326. ; 49:11
  • Journal article (peer-reviewed)abstract
    • A new method for determining the temporal evolution of plasma rotation is reported in this work. The method is based upon the detection of two different portions of the spectral profile of a plasma impurity line, using a monochromator with two photomultipliers installed at the exit slits. The plasma rotation velocity is determined by the ratio of the two detected signals. The measured toroidal rotation velocities of C III (4647.4 angstrom) and C VI (5290.6 angstrom), at different radial positions in TCABR discharges, show good agreement, within experimental uncertainty, with previous results (Severo et al 2003 Nucl. Fusion 43 1047). In particular, they confirm that the plasma core rotates in the direction opposite to the plasma current, while near the plasma edge (r/a > 0.9) the rotation is in the same direction. This technique was also used to investigate the dependence of toroidal rotation on the poloidal position of gas puffing. The results show that there is no dependence for the plasma core, while for plasma edge (r/a > 0.9) some dependence is observed.
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