Lucent Waveguide Electromagnetic Wave

摘要

A Lucent Waveguide Electromagnetic Wave Plasma Light Source has a fabrication (1) of quartz with an inner closed void enclosure (2) is formed of 8 mm OD, 4 mm ID drawn tube. It is sealed at its inner and outer ends (3,4). Microwave excitable plasma material is sealed inside the enclosure. Its outer end (4) protrudes through an end plate (5) by approximately 10.5 mm and the overall length of the enclosure is approximately 20.5 mm. The tube (71) from which the void is formed is continued backwards from the inner end of the void enclosure as an antenna sheath (72). The 2 mm thick end plate (5) is circular and has the enclosure (2) sealed in a central bore in it.

主权项

1. A Lucent Waveguide Electromagnetic Wave Plasma Light Source comprising:
a fabrication of solid-dielectric, lucent material, the fabrication providing at least:
a closed void containing electromagnetic wave excitable plasma material; a Faraday cage:
at least substantially enclosing the fabrication,being at least partially lucent, for light emission from it anddelimiting a waveguide, the waveguide having:
a waveguide space, the fabrication occupying at least part of the waveguide space; and at least partially inductive coupling means for introducing plasma exciting electromagnetic waves into the waveguide at a position at least substantially surrounded by solid dielectric material;whereby on introduction of electromagnetic waves of a determined frequency a plasma is established in the void and light is emitted via the Faraday cage;
the arrangement being such that there is:
a first region of the waveguide space extending between opposite sides of the Faraday cage at this region, this first region:
at least partially accommodating the inductive coupling means andhaving a relatively high volume average dielectric constant anda second region of the waveguide space extending between opposite sides of the Faraday cage at this region, this second region:
having a relatively low volume average dielectric constant as compared to that of the first region, andbeing occupied by:
the fabrication of solid-dielectric, lucent material and either the closed void containing electromagnetic wave excitable plasma material alone or the closed void containing electromagnetic wave excitable plasma material and a cavity within the fabrication or the closed void containing electromagnetic wave excitable plasma material and an empty portion of the waveguide space between the fabrication and the Faraday cage or the closed void containing electromagnetic wave excitable plasma material and both a cavity within the fabrication and an empty portion of the waveguide space between the fabrication and the Faraday cage;wherein:
the at least partially inductive coupling means for introducing plasma exciting electromagnetic waves into the waveguide extends out of the first region and into the second region.