Microwave driven electrodeless lamp comprising magnetron without forced convective cooling

A Lucent Waveguide Plasma Light source to be supported by a support comprising:

• a fabrication of solid-dielectric, lucent material, having;
• a closed void containing electro-magnetic wave, normally microwave, excitable material;
• and
• a Faraday cage:
• delimiting a waveguide,
• being at least partially lucent, and normally at least partially transparent, for light emission from it,
• normally having a non-lucent closure and
• enclosing the fabrication;
• provision for introducing plasma exciting electro-magnetic waves, normally microwaves, into the waveguide;
• the arrangement being such that on introduction of electro-magnetic waves of a determined frequency a plasma is established in the void and light is emitted via the Faraday cage;
• wherein the said provision includes:
• a transition waveguide providing for introduction of plasma exciting microwaves into the void-containing-waveguide delimited in the lucent body by the Faraday cage and
• a magnetron for generating microwaves to excite a light emitting plasma in the void in the lucent waveguide formed by the fabrication and the Faraday cage;
• wherein there is included:
• a finned heat dissipation member for dissipating heat from the magnetron to the ambient atmosphere and
• means on the dissipation member for heat conductingly clamping the heat dissipation member to an anode and/or magnets of the magnetron;
• and
• wherein:
• the heat dissipation member supportingly connects the magnetron, transition waveguide and the lucent fabrication to the support,
• whereby the fins define a heat dissipating, convective airway through the said member which is a support-and-dissipation member.