A light source of UHF electrodeless discharge lamp

Abstract

The invention relates to an ultra-high frequency electrodeless discharge light source, which is composed of an electrodeless discharge lamp, an induction coil and a circuit board of an ultra-high frequency generation circuit, the electrodeless discharge lamp is arranged at the center of a hollow insulating frame, the outside of the insulating frame is sheathed with the induction coil, the induction coil is connected with the circuit board of an ultra-high frequency generator, the electrodeless discharge lamp is filled with hydrogen, deuterium and inert gas or the mixing gas in a sealed glass or quartz tube, the ultra-high frequency generator works at 50MHz to 150MHz and utilizes the gas in an ultra-high frequency ionization lamp for light emission. The ultra-high frequency electrodeless discharge lamp light source of the invention has high stability, small self-absorption, great emission intensity and long service life of the light source, the invention can be smoothly started at the low pressure, and can be used as the light source of a gas chromatography photoionization detector, a background light source of an atomic absorption spectrometer, a photoionization source of a mass spectrometer and so on, and the invention can be further used for generating the ozone for light cleaning, light oxidation, water purification and other treatments.

Description

technical field [0001] The invention relates to a special light source, in particular to an ultra-high frequency electrodeless discharge lamp light source for test equipment Background technique [0002] The English name of the electrodeless discharge lamp is "Electrodeless Discharge Lamp", also known as an external electrode lamp (External Electrode Lamp). Since there is no filament or electrode entering the bulb, there will be no failures such as air leakage or filament failure, so the life is particularly long. These lamps produce a high-intensity spectrum with narrow lines and no self-absorption. [0003] High-frequency gas discharge can be divided into three cases: ω<<υ, ω≌υ, and ω>>υ according to the relative magnitude of the angular frequency ω of the external high-frequency electric field and the effective electron collision frequency υ. These three cases also exist for the excitation of electrodeless gas discharge lamps. [0004] At present, the commer...

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Problems solved by technology

[0011] Therefore, the existing electrodeless discharge light source cannot simultaneously meet the requirements of high stability, small self-absorption, high emission intensity, long life of the light source, and smooth start-up at low voltage.

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