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Sökning: WFRF:(Ericsson G)

  • Resultat 51-60 av 309
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51.
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52.
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53.
  • Berg, M, et al. (författare)
  • A compact range telescope for K+ measurements
  • 1996
  • Ingår i: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT. - 0168-9002. ; 381:2-3, s. 267-274
  • Tidskriftsartikel (refereegranskat)abstract
    • We present range telescopes for measurements of low energy K+ mesons together with first in-beam results. The hardware trigger, based on the observation of the mu(+) from the K+ --> mu(-) + nu(mu) decay channel, is designed for subthreshold hadron-nucleus
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54.
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55.
  • Cappellin, C., et al. (författare)
  • Design and analysis of a reflector antenna system based on doubly curved Circular Polarization Selective Surfaces
  • 2016
  • Ingår i: 2016 10th European Conference on Antennas and Propagation, EuCAP 2016. - 9788890701863
  • Konferensbidrag (refereegranskat)abstract
    • This paper discusses the design and analysis of a reflector antenna system combining two doubly-curved Circular Polarization Selective Surfaces to provide a functionality equivalent to that of a dual gridded reflector but in circular polarization. The key feature of this design is to use a non-resonant CPSS design to avoid the bandwidth limitation of most CPSS designs previously discussed in the literature. A specific design at Ku-band is investigated and promising results are demonstrated, providing a cross-polarization discrimination higher than 25 dB over the full band.
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56.
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57.
  • Cazzaniga, C., et al. (författare)
  • Light response of YAP:Ce and LaBr3:Ce scintillators to 4-30 MeV protons for applications to Telescope Proton Recoil neutron spectrometers
  • 2016
  • Ingår i: Nuclear Instruments and Methods in Physics Research Section A. - : Elsevier BV. - 0168-9002 .- 1872-9576. ; 820, s. 85-88
  • Tidskriftsartikel (refereegranskat)abstract
    • The light response of two thin inorganic scintillators based on YAP:Ce and LaBr3:Ce crystals has been measured with protons in the 4-8 MeV energy range at the Uppsala tandem accelerator and in the 826 MeV energy range at the Legnaro tandem accelerator. The crystals have been calibrated in situ with Cs-137 and Co-60 gamma-ray sources. The relative light yields of protons with respect to gammas have been measured and are here reported to be (96 +/- 2)% and (80 +/- 2)% for YAP:Ce and LaBr3:Ce, respectively. The results open up to the development of a Telescope Proton Recoil spectrometer based on either of the two crystals as alternative to a silicon based spectrometer for applications to high neutron fluxes.
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58.
  • Cecconello, Marco, et al. (författare)
  • Energetic ion behaviour in MAST
  • 2015
  • Ingår i: Plasma Physics and Controlled Fusion. - : IOP Publishing. - 0741-3335 .- 1361-6587. ; 57:1, s. 014006-
  • Tidskriftsartikel (refereegranskat)abstract
    • Recent studies of fast ion transport resulting from a range of instabilities, including n = 1 internal kink modes (fishbones and long-lived modes), toroidal Alfven eigenmodes and sawteeth have been carried out at MAST. Strong correlations were found between relative changes in magnetic edge coils signals, edge D alpha signal a fast ion D alpha system, a prototype collimated neutron flux monitor and a recently installed prototype charged fusion product detector array, indicating both redistribution and loss of fast ions. Preliminary interpretation of these observations with a suite of stability, modelling and interpretative codes is discussed.
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59.
  • Ericsson, A., et al. (författare)
  • A Contoured-Beam Reflector Satellite Antenna Using Two Doubly Curved Circular Polarization Selective Surfaces
  • 2021
  • Ingår i: IEEE Transactions on Antennas and Propagation. - 0018-926X. ; 69:2, s. 658-671
  • Tidskriftsartikel (refereegranskat)abstract
    • We present a reflector antenna system using a circular polarization selective surface (CPSS) to realize a circular polarization (CP) equivalent to the widely used linear polarization (LP) gridded or dual-gridded reflector (DGR). The CPSS is realized by a multilayer stack of non-resonant anisotropic meander line surfaces, achieving a very wide bandwidth. The CPSS reflection and transmission dyadics are computed using full-wave simulations for all angles of incidence and design frequencies applicable, and the doubly curved reflector surface shapes are optimized in the TICRA POS software. The data are input to the TICRA Tools software framework for antenna-system level RF simulations. A planar CPSS sample was first manufactured and tested to demonstrate the adequacy of the selected multilayer design. A doubly curved reflector demonstrator based on the same technology and with a projected aperture of 750 mm was then designed, manufactured, and tested at Ku-band. While promising, the experimental results emphasize the difficulty of producing an electrically large multilayer doubly curved surface with RF performance equivalent to the original flat design and recommendations are provided to improve further the implementation of the proposed design.
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  • Resultat 51-60 av 309
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