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  • Other Sources  (3)
  • 1985-1989  (3)
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  • 1
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    Excimer laser annealing for fabrication of low-cost solar cells (1985)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Pulsed excimer laser annealing was successfully performed using a 50 w laser. Both polished and texturized cells were tried, however, there are serious problems with nonuniformity on texturized cells. A number of cells were produced and compared to diffusion furnace annealed cells. There was no clear economic advantage in using an excimer laser and there was a small penalty on average efficiency. The conclusion was that the excimer laser anneal process must be able to produce superior cells to be considered as a viable process option.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: JPL, Pasadena, Calif. Proceedings of the 25th Project Integration Meeting; p 429-434
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Coherent HF radar backscatter from small-scale irregularities in the dusk sector of the subauroral ionosphere (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: This paper describes the characteristics of backscatter from decameter-scale ionospheric plasma density irregualarities, observed with an impressive regularity by the Goose Bay (Labrador) high-frequency (HF) radar in the dusk sector of the winter ionosphere, and discusses the relation of the scatter to the midlatitude trough. It is shown that this dusk scatter can be readily distinguished from other types of late afternoon/early evening scatter by the extreme equatorward position of its source region and by the low values of its associated radar Doppler velocities (not above 200 m/s) and spectral widths (not more than 200 m/s). A comparison of the radar observations with nearly simultaneous particle precipitation data obtained with the DMSP F6 satellite demonstrated that the source region of the backscatter lies within the subauroral ionosphere. It is shown that the characteristics of dusk scatter are compatible with the Spiro et al. (1978) model of the electrodynamics of the midlatitude trough.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 93; 12871-12
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Mapping high-latitude plasma convection with coherent HF radars (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Several methods developed for mapping high-latitude plasma convection with a high-latitude HF radar are described, which utilize coherent backscatter from electron density irregularities at F-region altitudes to observe convective plasma motion. Several examples of two-dimensional convection-velocity maps are presented, showing instances of L-shell-aligned flow in the dusk sector, the reversal of convection near magnetic midnight, and counterstreaming in the dayside cleft.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 94; 13463-13
    Format: text
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    NASA TECHNICAL REPORTS
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