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  • PLASMA PHYSICS  (1)
  • Solid-State Physics  (1)
  • 1985-1989  (2)
  • 1980-1984
  • 1
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    Static properties of a non-neutral Be-9(+)-ion plasma (1988)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The paper reports measurements of the static properties of laser-cooled nonneutral Be-9(+)-ion plasmas stored in Penning traps (PT) under a variety of experimental conditions. The shape, rotation frequency, density, and temperature of the ions were measured as functions of the PT potential and laser-cooling configuration. Within experimental error, the ion plasmas rotate without shear and exhibit approximate thermal equilibrium.
    Keywords: PLASMA PHYSICS
    Type: Physical Review A - General Physics, 3rd Series (ISSN 0556-2791); 38; 859-873
    Format: text
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  • 2
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    Laser furnace and method for zone refining of semiconductor wafers (1988)
    In:  CASI
    Details
    Publication Date: 2019-08-15
    Description: A method of zone refining a crystal wafer (116 FIG. 1) comprising the steps of focusing a laser beam to a small spot (120) of selectable size on the surface of the crystal wafer (116) to melt a spot on the crystal wafer, scanning the small laser beam spot back and forth across the surface of the crystal wafer (116) at a constant velocity, and moving the scanning laser beam across a predetermined zone of the surface of the crystal wafer (116) in a direction normal to the laser beam scanning direction and at a selectible velocity to melt and refine the entire crystal wafer (116).
    Keywords: Solid-State Physics
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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