Tungsten filament lamp glows at a temperature near 3000 k produces radiation at wavelengths from 320 to 2500 nm. Us5387850a electrodeless discharge lamp containing pushpull. The discharge gas includes a halide of rare earth metal. Electrodeless discharge article about electrodeless. This paper presents a versatile ballast for discharge lamps, whose operation is based on the notion of a lossfree resistor lfr. A novel mercuryfree dewarlike doublewalled structure microwave discharge thermallyinsulated electrodeless lamp mdtiel was fabricated and its performance evaluated using the photo.
This article reports on the fabrication and enhanced performance of a novel microwave discharge electrodeless lamp mdel consisting of a three layered cylindrical structure that was effective in the remediation of wastewater containing the 2,4d herbicide and the near total sterilization of bacteriacontami. The spectral characteristics of the electrodeless lamp resemble more those of highpressure mercury lamps. Some salient features, such as selfabsorption and selective excitation of elements, of microwave excited thorium iodide and other electrodeless discharge. From an electrical point of view, the lamp can be thought of as a transformer, where the coil acts as the primary and the plasma acts as the secondary.
Radiation sources atomic absorption spectroscopy learning. Perkinelmer system 2 electrodeless discharge lamp assemblies. Pdf highfrequency electrodeless lamps for application in atomic. The first practical electrodeless lamp appeared a short time later, and the technology continues to gain in popularity today due to its energy and maintenance advantages.
Every genuine perkinelmer lumina lamp is designed for use with and tested on our spectrometers to assure compatibility and the highest. Us4812702a excitation coil for hid electrodeless discharge. An item from our full range of system 2 electrodeless dicharge lamps for 3100 spectrometer. Electrodeless lamp article about electrodeless lamp by. The destruction of low concentration of toluene 030 ppm has been studied under the uvphotogenerated o 3 mno 2impregnated granular activated carbon mno 2impregnated gac. The internal electrodeless lamp or induction lamp is a gas discharge lamp in which an electric or magnetic field transfers the power required to generate light from outside the lamp envelope to the gas inside. Jun 28, 20 the intensity of fluorescence spectral lines of rb atoms in the region of 3501110 nm is measured in eletrodeless discharge lamp. An electrodeless discharge lamp, consisting of a transparent envelope containing an ionizing gas and a minor amount of.
The internal electrodeless lamp or induction lamp is a gas discharge lamp in which an electric. The spectral output of the electrodeless discharge mercury lamp is known. At the same time, the population density of energy level is also obtained. The population ratio between the excited states is calculated according to the spontaneous transition probabilities with rate equations. Electrodeless discharge lamps edls electrodeless discharge lamp edls are line sources that provide radiant energy that has a greater intensity than hcl.
Mercury hg system 2 electrodeless discharge lamp perkinelmer. Note multielement lamps are not designed to be used with furnace systems. In this paper we present the results of an investigation of highfrequency electrodeless discharge lamps hfedls. In the 1980s the subject of a lowwattage incandescent retrofit lamp was being extensively researched in the labs of philips and thorn lighting, both of whom created advanced prototypes that came very. Low pressure mercuryargon electrodeless fluorescent lamp. Arsine generation and determination of trace amounts of arsenic by atomic absorption spectrometry. System 2 electrodeless discharge lamps edls provide the optimized spectral output needed to get the maximum performance from perkinelmer atomic absorption spectrometers.
The electrical discharge without electrodes was discov. Electrodeless discharge lamp is easily started, has high stability. Pdf electric equivalent model for induction electrodeless. Find perkinelmer system 2 electrodeless discharge lamp assemblies at now. Distribution of populations in excited states of electrodeless discharge lamp of rb atoms. Determination of arsenic by atomic absorption spectrometry with an electrodeless discharge lamp as a source of radiation. An electrodeless discharge lamp includes a discharge gas sealed in a lamp tube. Abstract electrodeless discharge lamps have several advantages compared to lamps containing electrodes, including longer life, improved lumen maintenance, lamp efficacy, flexibility of. Other articles where electrodeless lamp is discussed. Temperature of an electrodeless discharge lamp and determination of the oscillator strength for the i2p32 183. While experimenting with highfrequency current, inventor nikola tesla developed an electrodeless lamp, but the concept remained largely unexplored for the next century except as a novelty lamp in the. We have been leaders for decades in developing energyefficient windows. If the efficiency of discharge lamps could be increased by 1%, it would result in a saving of 10 9 kwh per year worldwide.
Mercury hg electrodeless discharge lamp from perkinelmer. However, only inductive discharges have been successfully exploited as a commercial lamp for general lighting purposes. Aug 26, 2014 light sources incandescent lamp discharge lamp florescent lamp sodium lamp high pressure mercury vapour lamp 3. Inductive lighting electrodeless lamp the talk page discussion reveals that electrodeless lampis the correct common title for this page the preceding unsigned comment was added by gerben49 talk. Request pdf highfrequency electrodeless discharge lamps for atomic absorption analysis in this paper we present the results of an investigation of highfrequency electrodeless discharge lamps. Electrodeless lamp article about electrodeless lamp by the. Electrodeless discharge lamp fusion systems corporation. An electrodeless discharge lamp system includes an excitation coil placed in proximity of the electrodeless discharge lamp, a resonance circuit for supplying appropriate power to the excitation. Determination of arsenic by atomic absorption spectrometry.
Induction high bay fixture,electrodeless lamp,lvd flood. If specific atomic lines are desired, a small amount of the desired element is introduced in the discharge. Northrop grumman electronic sensors and systems division essd and fusion lighting, inc. The population ratio between the excited states is. The intensity of fluorescence spectral lines of rb atoms in the region of 3501110 nm is measured in eletrodeless discharge lamp. An electrodeless discharge lamp in an evenson cavity has been used by dr. The lamp can on and off without shutter and short period time to warm up. The microwave discharge electrodeless mercury lamp mdeml used in. An electrodeless discharge lamp system includes an excitation coil placed in proximity of the electrodeless discharge lamp, a resonance circuit for supplying appropriate power to the excitation coil, and a high frequency power source driver and wherein, the combined output is achieved by operating the parallel connected power sources in synchronization or approximately in synchronization with.
This article reports on the fabrication and enhanced performance of a novel microwave discharge electrodeless lamp mdel consisting of a three layered cylindrical structure that was effective in the. They offer better precision and lower detection limits for analyses that are noisy due to weak hollow cathode emission. Electrodeless discharge lamp including impedance matching and. Electrodeless lamp lighting systems utilizing the sulfur based bulb type developed by fusion lighting, inc. Electrodeless discharge lamp matsushita electric works, ltd. Light sources incandescent lamp discharge lamp florescent lamp sodium lamp high pressure mercury vapour lamp 3. The photodegradation of chlorodifluoromethane hcfc22 was investigated using microwaveuvtio 2 photocatalysts hybrid system. Us3873884a electrodeless discharge lamp and power coupler. The lamp gives over three times as much uv radiation as the conventional electrode lamp. Perkinelmer system 2 edls consist of the element or a salt of the element sealed in a quartz bulb containing an inert gas atmosphere. Thus, the conversion using a simax lamp was lowered approximately by a factor of 7 compared to that of a quartz lamp table 3, which is in a good accord with wellknown nist data of irradiance from the hgar lines. Introduction the electric discharge lamp is one of the most. It has been known for several decades that the electrodeless discharge lamp microwave lamp. Inductive lighting electrodeless lamp the talk page discussion reveals that electrodeless lampis the correct common title for this page the preceding unsigned comment was added by gerben49 talk contribs 30 june 2005, 21.
Pdf this paper presents an electric equivalent model applied to induction electrodeless fluorescent lamps. Tas electrodeless lamps are available in 6 inch and 10 inch size and vary in power from 300winch to 600winch. The internal electrodeless lamp or induction lamp is a gas discharge lamp in which an electric or magnetic field transfers the power required to generate light from outside the lamp envelope to the. Microwave discharge electrodeless lamps mdel part vii. This is in contrast to a typical gas discharge lamp that uses internal electrodes connected to the power supply by conductors that pass. Mar 24, 1987 in a typical electrodeless discharge lamp, the plasmaforming medium is mercury which is ionized by low level ultraviolet radiation having a short wavelength, i. Every genuine perkinelmer lumina lamp is designed for use with and tested on our spectrometers to assure compatibility and the highest performance. Electrodeless discharge lamps operate by using an induction coil to couple electromagnetic energy to a gas mixture. Electrodeless gas discharges for lighting springerlink. High frequency hf discharge electrodeless lamp hfdel, a typical uv light source, has been invented over 100 years and started to apply into the photolysis of organic compounds in solution and the. Rains at national bureau of standards washington, d. The bulb contains a small quantity of the element of interest.
The spectral output of the electrodeless discharge mercury lamp is known to resemble more those of highpressure mercury lamps. Dt is a discharge tube containing a rarefied gas, c is the capacitor of an oscillatory circuit, l is the inductance coil, and g is an electromagnetic oscillation generator. Temperature and envelope materialdependent emission characteristics this work extends our previous. These are sealed quartz tubes filled with inert gas at low pressure, much like hcl. Introduction the electric discharge lamp is one of the most important plasma devices today. Perkinelmer n3050657 lead system 2 electrodeless discharge. Electrodeless discharge borosilicate glass lamp is used in various highresolution optical systems. Pdf the high frequency hf electrodeless lamps edl with different fillings. The envelope is formed from two different types of quartz, one.
An electrodeless discharge lamp having an ultraviolet radiation transmission envelope containing a plasmaforming medium. Atomic spectra from rf electrodeless discharge sources for. High frequency hf discharge electrodeless lamp hfdel, a typical uv light source, has been invented over 100 years and started to apply into the photolysis of organic compounds in solution and the irradiation of gases since 1970s 6. Fluorescent lamps are low pressure discharges, operating at an electron temperature of 12ev. Photodegradation of hcfc22 using microwave discharge. Electrodeless discharge lamps and some features of spectra emitted. Electrodeless discharge definition of electrodeless. Perkinelmer n3050657 lead system 2 electrodeless discharge lamp, 2 o. Hollow cathode lamp electrode less discharge lamp lasers 11. We are at the forefront of cuttingedge research that redefines building technology and explores all areas of urban systems. Lumina hollow cathode and electrodeless discharge lamps. The microwave discharge electrodeless mercury lamp mdeml used in this study showed mainly atomic hg emission lines at 253. The uv emission can stimulate phosphors coated on the surface of the bulb.
It is partially charged with krypton, contains small amounts of rubidium, and is enclosed in a. The high frequency electrodeless discharge lamp is made of three parts. Highfrequency electrodeless discharge lamps for atomic. An excitation coil, for stimulating a highintensity discharge plasma in an electrodeless discharge lamp, has at least one turn of a conductor arranged generally upon the surface of a toroid with a rhomboid or vshaped crosssection, which is substantially symmetrical about a plane passing through the maxima of the toroid. This paper presents the design, control strategy and experimental results of a twostep, power factor correction stage pfc and resonant inverter ri, electronic ballast proposal to supply 150 w. It is partially charged with krypton, contains small amounts of rubidium, and is enclosed in a hermetically sealed envelope that maintains the lamp at an optimum temperature during discharge. A lossfree resistorbased versatile ballast for discharge. Electrodeless discharge lamp is easily started, has high. The electrode less discharge lamp uses an induction coil or energycoupling antenna without electrodes, which use the application of lowpressure gas discharge. Us5525871a electrodeless discharge lamp containing pushpull.
These electrodeless discharge lamps are preferred for certain volatile elements. While experimenting with highfrequency current, inventor nikola tesla developed an electrodeless lamp, but the concept remained largely unexplored for the next century except as a novelty lamp in the 1980s. Electrodeless discharge definition is a discharge produced in the neighborhood of a highfrequency alternating current under certain conditions through a gas contained in a closed tube without electrodes. Mwl generates ultraviolet uv radiation in the microwave mw field, i. Temperature and envelope materialdependent emission characteristics this work extends our. Electrodeless lighting electrical contractor magazine. The lamp provides highintensity, farultraviolet, arsenic line radiation. Temperature and envelope materialdependent emission characteristics. These are sealed quartz tubes filled with inert gas. The lamp then reaches full power within a few seconds, producing the spectral output required for curing. An excitation coil, for stimulating a highintensitydischarge plasma in an electrodeless discharge lamp, has at least one turn of a conductor arranged generally upon the surface of a toroid with a rhomboid or. When the power goes through the high frequency power. An auxiliary electrode is disposed on or adjacent to. Atomic spectra from rf electrodeless discharge sources for uv.
Abstract electrodeless discharge lamps have several advantages compared to lamps containing electrodes, including longer life, improved lumen maintenance, lamp efficacy, flexibility of lamp design, the use of chemical doses that would interact with electrodes, and improved electrical control. When an rf field of sufficient power is applied, the. In principle, electrodeless lamps can be excited by three discharge mechanisms, i. From an electrical point of view, the lamp can be thought of as a transformer, where the coil acts as the primary and the plasma.
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