Pulsed xenon lamp

Hodgson B W and Keene J P 1972 Some characteristics of a pulsed xenon lamp for use as a light source in kinetic spectrophotometry Rev. Sol. Instnim. 43 493-6... 

The pulsed xenon lamp forms the basis for both fluorescence and phosphorescence measurement. The lamp has a pulse duration at half peak height of lOps. Fluorescence is measured at the instant of the flash. Phosphorescence is measured by delaying the time of measurement until the pulse has decayed to zero. 

These instruments feature keyboard entry of instrument parameters which combined with digital displays, simplifying instrument operation. A high-output pulsed xenon lamp, having low power consumption and minimal ozone production, is incorporated within the optical module. 

The reaction cell has a White cell optical system (see Chapter ll.A.lc) with a pulsed xenon lamp light source. Once the radicals are formed, they are detected by their absorptions in the UV using the Xe lamp and a monochromator-photomultiplier or photodiode array detector. Thus the absorption spectra of the free radicals generated in the system can be measured and the absorption at a particular wavelength used to follow their reaction kinetics. 

Xenon lamps are available mainly as tubular and point source bulbs. The radiation produced by this type of lamps is not particularly rich at wavelengths below 400 nm, and therefore their applications are somewhat limited. However, it is possible to pulse xenon lamps, which enables them to achieve high peak irradiances. Commercially available pulsed xenon lamps are available with emissions in the UV and visible spectral range. Alternating the gas fill can produce output rich in UV. 

Pulsed curing systems are widely used in the manufacture of medical devices, electronics, semiconductors, and optical fibers. Pulsed xenon lamps can be made in a variety of shapes to fit specific requirements, such as 360° illumination. Examples of different designs are in Figures 3.5 and 3.6. 

The energy sources of uv light cured coatings are typically medium-pressure mercury lamps, electrodeless vapor lamps, pulsed xenon lamps, or lasers. These generally emit... 

The pulsed xenon lamp source in Table III merits special attention. It is a well recognized fact that pulsing xenon lamps significantly increases their output below 300 nm. In addition, photon flux densities produced by pulsing xenon lamps are extremely high and can lead, under the correct circumstances, to efficient curing of highly filled, very thick films or composites. Both the output below 300 nm and the hig pulse densities make pulsed xenon lamp sources a choice which should be considered for certain critical applications. 

The luminescence decay curves were registered on a SPEX Fluorolog F212 spectro-fluorimeter linked to a 1934 D phosphorimeter with a 150 W pulsed xenon lamp. 

Five basic lamp systems are available to produce UV radiation (1) medium-pressure mercury vapor lamps (2) electrode less lamps (3) pulsed xenon lamps (4) hybrid xenon/ mercury vapor lamps and (5) low-pressnre germicidal lamps. Medium-pressure mercury lamps that emit a wide range of wavelengths are by far the most important radiation sources for curing of coatings. 

In terms of sensor development several of these sources have distinct advantages, notably LEDs, pulsed xenon lamps and lasers. LEDs have the advantage that they are inexpensive and simple, although not very intense. However, they may find application in the development of simple purpose-built equipment. Pulsed xenon sources when coupled to a gated detector are particularly useful because a probe based on this type of system may be used in an open beaker without interference from ambient light. Laser sources have the advantages of high power and excellent collimation. The laser sources... 

In 1974 electrodeless lamps powered by microwaves were developed. Output was 36% UV and bulb life was considerably longer. Spectral output was more flexible due to different bulb compositions. Power was up to 300 watt/inch. Although pulsed xenon lamps offer another alternative, MPM lamps and electrodeless units account for most of the UV curing done today [21]. 

Time-Resolved Microsecond Emission Using Pulsed Xenon Lamp Excitation... 

Phosphorescence measurements (spectra and decays, see Fig. 15.2) can be carried out in glasses at 77 K using a spectrometer equipped with a phosphorimeter unit (and an appropriate light source which can be a pulsed xenon lamp or a laser). The phosphorescence spectra should also be corrected for the wavelength response of the system. 

Medium pressure mercury lamps Electrode less vapour lamps Pulsed xenon lamps Lasers The range of radiation is in the region of 200-760nm the source is a filament inside a vacuum tube... 

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