Pollution-free efficient source of visible light of high brightness on runaway electrons.

Details Pollution-free efficient source of visible light of high brightness on runaway electrons. Pollution-free efficient source of visible light of high brightness on runaway electrons.

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aps..gecpt2010b&link_type=abstract

American Physical Society, 57th Gaseous Electronics Conference, 26-29 September, 2004, Shannon, Republic of Ireland, MEETING ID:

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Scientific paper

Nowadays photoluminescent lamps, which contain mercury vapor, are considered to be the most efficient and the brightest sources of visible light. Due to harmful influence of mercury on human health the problem of mercury-free sources of light is very important. A new pollution-free wide-angle efficient source of visible light of high brightness by using the open discharge in inert gases has been developed. Direct excitation of phosphor screen by runaway electron beam is its principal feature. About 80% of energy deposited into the discharge is carried by runaway electron beam. The optimization of construction features of the light source has been carried out. As a result, the efficiency of more than 30 lm/W and brightness of more than 20000 cd/m^2 have been obtained. Furthermore, as experimentally shown, the intensity of a back light flux from the phosphor surface in the direction of the electron beam is 2-3 times higher than the light flux intensity behind the phosphor screen. The evaluation calculations have confirmed these results. Thus, the application of special phosphor arrangement allows one to increase a total light yield and provide the source efficiency, comparable with the mercury-containing photoluminescent lamps. Constructive simplicity and respective low cost of the light source advantageously distinguishe it from other cathodoluminescent lamps.

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