Recursos de colección

Archivo Digital UPM (115.086 recursos)

This is an institutional repository providing access to the research output of the institution. Primarily contains thesis.

Materia = Optica

Mostrando recursos 1 - 3 de 3

  1. Stopping of α particles from the core in corona plasmas

    Mima, Kunioki; Tajima, Toshiki; Alvarez Ruiz, Jesus; Tanaka, K.A.; Perlado Martín, José Manuel; Nagatomo, H.; Johzaki, T.; Sunahara, A.
    In the laser fusion reactor design, the protection of first wall and the final optics from high energy ions is the key issue. So, it is necessary to predict the precise energy spectra of ions.In the previous reactor designs, the ion energy spectra were provided by the classical ion transport codes. However, this poster shows that the α particle spectrum is significantly modified by the anomalous process in ablated plasmas.
    (application/pdf) - 07-sep-2017

  2. Uncertainty in ellipse fitting using a flatbed scanner: development and experimental verification

    Vicente Oliva, Jesús de; Sanchez Perez, Angel M.; Berzal Rubio, Miguel; Maresca, Piera; Gomez Garcia, Emilio
    In the field of dimensional metrology, the use of optical measuring machines requires the handling of a large number of measurement points, or scanning points, taken from the image of the measurand. The presence of correlation between these measurement points has a significant influence on the uncertainty of the result. The aim of this work is the development of an estimation procedure for the uncertainty of measurement in a geometrically elliptical shape, taking into account the correlation between the scanning points. These points are obtained from an image produced using a commercial flat bed scanner. The characteristic parameters of the...
    (application/pdf) - 11-nov-2017

  3. Super-resolution properties of the Spherical Geodesic Waveguides using the perfect drain

    Gonzalez Lopez, Juan Carlos; Grabovičkić, Dejan; Miñano Dominguez, Juan Carlos; Benitez Gimenez, Pablo
    Perfect drain for the Maxwell Fish Eye (MFE) is a nonmagnetic dissipative region placed in the focal point to absorb all the incident radiation without reflection or scattering. The perfect drain was recently designed as a material with complex permittivity ? that depends on frequency. However, this material is only a theoretical material, so it can not be used in practical devices. Recently, the perfect drain has been claimed as necessary to achieve super-resolution [Leonhard 2009, New J. Phys. 11 093040], which has increased the interest for practical perfect drains suitable for manufacturing. Here, we analyze the superresolution properties of...
    (application/pdf) - 11-nov-2017

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