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DBD lamps

Discussion in 'Lighting' started by Michael Cyron, Aug 13, 2004.

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  1. hello,

    if you have a Xenon filled DBD lamp with 2 dielectric layers, on each side,
    and the electrons in the GAP are being accelerated, there are 3 scenarios
    which can happen (if i understood it properly)

    1. the kinetic electron energy is too low to generate new electrons
    (townsend effect) or to excite the atom

    2. the electron has enough energy to excite the atom, but not enough to
    generate new electrons...so the Xenon will emit radiation, which will be
    absorbed by the Phosphor

    3. the electron has enough energy to generates new electrons after the
    impact in the atom...if enough electrons are generated, a conducting channel
    appears, the plasma

    Is this in general correct?


    And another question.
    The visible light is the light from the excited atoms -> phosphor changes it
    wave length to visible light.
    But what is with the light from the plasma...shouldn't it also be visible,
    like a lightning/flash?

    Thanks a lot.
     
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