Study On The Measurement And Analysis Of Spectral Characteristics Of Xenon-flashlamp

With the rapid development of analytical and medical instruments, the lightsources are required to have high radiation intensity, high stability and long lifetime.Moreover, in order to choose suitable ultraviolet wavelength, spectrum analysisinstrument puts forward special requirements, including high intensity withinultraviolet spectrum, good continuity, on the ultraviolet spectrum of the light source.Short arc pulse xenon lamp has a series of advantages, such as good ultravioletspectrum, high light intensity, satisfying light efficiency, and desirable lifetime.Therefore, as a kind of alternative light sources, the pulse xenon lamp are widelyemployed in the realm of instrument industry.Based on the theory of gas discharge, it is of great significance that using theatomic internal gas and simple semi-classical method to analyze of the characteristicsof pulse xenon lamp spectrum and the composition of plasma and spectrum impactfactors for the application of the pulsed xenon lamp. In this paper, theoretical analysisof gas discharge is employed to expound the discharge process of pulse xenon lamp.Pulse xenon lamp spectral characteristic is related with the structure of the pulsedxenon lamp spectrum, spectral energy distribution, and single flash energy.This paperanalyzes the spectral characteristic under different discharge pressure, dischargecapacity, arc length and the spectral characteristics of different voltages, and alsointroduces the calculation factors, including discharge and ultraviolet light efficiency,as an evaluation index of the performance of the pulse xenon lamp spectrum.This experiment measures the spectrum of a HAMAMATSU pulse xenon lampunder four different arc lengths and inflatable pressures. Experiment shows that thepulse xenon lamp spectrum consists continuous and line spectra. The continuousspectrum is produced by compound and bremsstrahlung radiation, while the linespectrum is produced by electron energy level transition. Spectral radiant efficiencydecreases when voltage increases, arc length and capacitance decreases. There is acritical pressure value which leads to an opposite increasing trend of spectra ondifferent sides of it. The ratio of ultraviolet increases as the voltage rises, theproportion of larger, and its growth rate is affected by composite and bremsstrahlungradiation effects which slows down after increase first and then increases rapidlyagain. Characteristics of radiation energy spectrum and the spectrum is consistent with the overall, voltage rise at6p and7p electronic level increased, with increasingvoltage6p level electronic more toward the5d energy level transition,271nanometers infrared light to grow faster.The work in this paper has great significance on the pulse xenon lamp qualitytesting, parameters selection and industrial application.