PLASMA LIGHT SOURCE Russian patent published in 2015 - IPC H01J65/04 

FIELD: electricity.

SUBSTANCE: invention relates to the electrical engineering. High-frequency light source (11) has the central body (12) of fused silica with central cavity (14) filled with charge (16) of material excited by HF power in order to generate light-emitting plasma. Inner cup (17) is made of perforated metal gasket and its length in regard to length of the central body is within limits up to 2.5mm till its end with cavity intended for creation startup gap (18). Inner cup (17) has transversal end portion (19) prolonged opposite the other inner end of the central body (12). Outer cylinder (20) of fused silica is made with inner channel (21) so that it is set with sliding fit onto the inner cup (17), which in its turn is set with sliding fit onto the central body (12). Outer cup (22) is made of perforated metal; it includes outer cylinder having end portion (23) prolonged opposite blunt end with cavity of the central body (12) and outer cylinder (20) made of quartz. Outer cup (22) has a skirt (25) spaced along other blunt ends of quartz elements over aluminium carrier (26), whereat it is fixed with fixation of blunt ends at the carrier. Thus the end (23) of outer cup (22) and carrier (26) form faraday cage around the central body (12) of quartz and plasma cavity (14). Antenna (27) isolated from the carrier (26) is protruded from it to the channel (28) in outer cylinder (20) of quartz in order to introduce HF radiation to coaxial waveguide formed by inner and outer cups (17, 21). Their openings are impermeable and screening for HF radiation but at the same time they emit light and due to this fact plasma light can pass through them. Part of antenna (27) in the carrier (26) ensures connection to HF energy source, which is not specified at drawings. At its end part (19) inner cup (17) is grounded to the carrier (26) in the same way as outer cup (22) and its end part (23). Thus the gap (18) between inner cup (17) end and faraday cage end forms startup gap so that HF energy could be emitted to plasma cavity initiating and maintaining plasma in it. Light from plasma passes through crystal elements, openings in cups and end part (19) and is outputted from the light source.

EFFECT: improved efficiency of radiation and broader operational functionalities.

16 cl, 3 dwg