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. The photodegradation of chlorodifluoromethane hcfc22 was investigated using microwaveuvtio 2 photocatalysts hybrid system. Perkinelmer n3050657 lead system 2 electrodeless discharge lamp, 2 o. 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. A lossfree resistorbased versatile ballast for discharge. 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. 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.
Temperature and envelope materialdependent emission characteristics this work extends our. It has been known for several decades that the electrodeless discharge lamp microwave lamp. Light sources incandescent lamp discharge lamp florescent lamp sodium lamp high pressure mercury vapour lamp 3. 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. 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. Hollow cathode lamp electrode less discharge lamp lasers 11.
Atomic spectra from rf electrodeless discharge sources for uv. This is in contrast to a typical gas discharge lamp that uses internal electrodes connected to the power supply by conductors that pass. Introduction the electric discharge lamp is one of the most. 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. The lamp provides highintensity, farultraviolet, arsenic line radiation. The bulb contains a small quantity of the element of interest. Rains at national bureau of standards washington, d. The internal electrodeless lamp or induction lamp is a gas discharge lamp in which an electric.
An electrodeless discharge lamp includes a discharge gas sealed in a lamp tube. Electrodeless discharge lamp including impedance matching and. 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. 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. Electrodeless discharge definition of electrodeless. Electrodeless discharge article about electrodeless. They offer better precision and lower detection limits for analyses that are noisy due to weak hollow cathode emission. Every genuine perkinelmer lumina lamp is designed for use with and tested on our spectrometers to assure compatibility and the highest. 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. These are sealed quartz tubes filled with inert gas at low pressure, much like hcl. Microwave discharge electrodeless lamps mdel part vii. Perkinelmer system 2 edls consist of the element or a salt of the element sealed in a quartz bulb containing an inert gas atmosphere. A novel mercuryfree dewarlike doublewalled structure microwave discharge thermallyinsulated electrodeless lamp mdtiel was fabricated and its performance evaluated using the photo. 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.
Electrodeless discharge lamp fusion systems corporation. Electrodeless discharge lamp matsushita electric works, ltd. Temperature of an electrodeless discharge lamp and determination of the oscillator strength for the i2p32 183. When an rf field of sufficient power is applied, the. An auxiliary electrode is disposed on or adjacent to. 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. Electrodeless lighting electrical contractor magazine. Radiation sources atomic absorption spectroscopy learning.
System 2 electrodeless discharge lamps edls provide the optimized spectral output needed to get the maximum performance from perkinelmer atomic absorption spectrometers. 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. Induction high bay fixture,electrodeless lamp,lvd flood. The spectral output of the electrodeless discharge mercury lamp is known to resemble more those of highpressure mercury lamps. Electrodeless discharge borosilicate glass lamp is used in various highresolution optical systems. Electrodeless lamp article about electrodeless lamp by. Tas electrodeless lamps are available in 6 inch and 10 inch size and vary in power from 300winch to 600winch. Tungsten filament lamp glows at a temperature near 3000 k produces radiation at wavelengths from 320 to 2500 nm. Note multielement lamps are not designed to be used with furnace systems. Northrop grumman electronic sensors and systems division essd and fusion lighting, inc.
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. Temperature and envelope materialdependent emission characteristics this work extends our previous. Electrodeless gas discharges for lighting springerlink. Pdf this paper presents an electric equivalent model applied to induction electrodeless fluorescent lamps. The microwave discharge electrodeless mercury lamp mdeml used in. 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.
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 contribs 30 june 2005, 21. Pdf the high frequency hf electrodeless lamps edl with different fillings. An electrodeless discharge lamp having an ultraviolet radiation transmission envelope containing a plasmaforming medium. Photodegradation of hcfc22 using microwave discharge. The population ratio between the excited states is calculated according to the spontaneous transition probabilities with rate equations. Temperature and envelope materialdependent emission characteristics. Mercury hg system 2 electrodeless discharge lamp perkinelmer. Electrodeless discharge lamps edls electrodeless discharge lamp edls are line sources that provide radiant energy that has a greater intensity than hcl. Electrodeless lamp lighting systems utilizing the sulfur based bulb type developed by fusion lighting, inc. The intensity of fluorescence spectral lines of rb atoms in the region of 3501110 nm is measured in eletrodeless discharge lamp.
Pdf electric equivalent model for induction electrodeless. 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. 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. When the power goes through the high frequency power. Every genuine perkinelmer lumina lamp is designed for use with and tested on our spectrometers to assure compatibility and the highest performance. We are at the forefront of cuttingedge research that redefines building technology and explores all areas of urban systems. Us5525871a electrodeless discharge lamp containing pushpull. 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. If specific atomic lines are desired, a small amount of the desired element is introduced in the discharge. An item from our full range of system 2 electrodeless dicharge lamps for 3100 spectrometer. We have been leaders for decades in developing energyefficient windows. Determination of arsenic by atomic absorption spectrometry.
In this paper we present the results of an investigation of highfrequency electrodeless discharge lamps hfedls. Introduction the electric discharge lamp is one of the most important plasma devices today. The electrical discharge without electrodes was discov. The high frequency electrodeless discharge lamp is made of three parts. Abstract electrodeless discharge lamps have several advantages compared to lamps containing electrodes, including longer life, improved lumen maintenance, lamp efficacy, flexibility of. Find perkinelmer system 2 electrodeless discharge lamp assemblies at now. Lumina hollow cathode and electrodeless discharge lamps.
Pdf highfrequency electrodeless lamps for application in atomic. Highfrequency electrodeless discharge lamps for atomic. 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. It is partially charged with krypton, contains small amounts of rubidium, and is enclosed in a.
However, only inductive discharges have been successfully exploited as a commercial lamp for general lighting purposes. The lamp can on and off without shutter and short period time to warm up. Other articles where electrodeless lamp is discussed. The lamp then reaches full power within a few seconds, producing the spectral output required for curing. If the efficiency of discharge lamps could be increased by 1%, it would result in a saving of 10 9 kwh per year worldwide. Perkinelmer n3050657 lead system 2 electrodeless discharge. The microwave discharge electrodeless mercury lamp mdeml used in this study showed mainly atomic hg emission lines at 253.
Electrodeless discharge lamp is easily started, has high stability. In principle, electrodeless lamps can be excited by three discharge mechanisms, i. Arsine generation and determination of trace amounts of arsenic by atomic absorption spectrometry. These electrodeless discharge lamps are preferred for certain volatile elements. An electrodeless discharge lamp, consisting of a transparent envelope containing an ionizing gas and a minor amount of. 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. 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. Determination of arsenic by atomic absorption spectrometry with an electrodeless discharge lamp as a source of radiation. Low pressure mercuryargon electrodeless fluorescent lamp. Us4812702a excitation coil for hid electrodeless discharge.
The discharge gas includes a halide of rare earth metal. Jun 28, 20 the intensity of fluorescence spectral lines of rb atoms in the region of 3501110 nm is measured in eletrodeless discharge lamp. The lamp gives over three times as much uv radiation as the conventional electrode lamp. Atomic spectra from rf electrodeless discharge sources for. The uv emission can stimulate phosphors coated on the surface of the bulb. The envelope is formed from two different types of quartz, one. These are sealed quartz tubes filled with inert gas. Mercury hg electrodeless discharge lamp from perkinelmer. 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. Us5387850a electrodeless discharge lamp containing pushpull. Mwl generates ultraviolet uv radiation in the microwave mw field, i. Us3873884a electrodeless discharge lamp and power coupler.
The spectral characteristics of the electrodeless lamp resemble more those of highpressure mercury lamps. At the same time, the population density of energy level is also obtained. Electrodeless lamp article about electrodeless lamp by the. 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. 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. The population ratio between the excited states is. The electrode less discharge lamp uses an induction coil or energycoupling antenna without electrodes, which use the application of lowpressure gas discharge. An electrodeless discharge lamp in an evenson cavity has been used by dr. Distribution of populations in excited states of electrodeless discharge lamp of rb atoms.
Perkinelmer system 2 electrodeless discharge lamp assemblies. Some salient features, such as selfabsorption and selective excitation of elements, of microwave excited thorium iodide and other electrodeless discharge. Electrodeless discharge lamps operate by using an induction coil to couple electromagnetic energy to a gas mixture. 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.
This paper presents a versatile ballast for discharge lamps, whose operation is based on the notion of a lossfree resistor lfr. The spectral output of the electrodeless discharge mercury lamp is known. Electrodeless discharge lamp is easily started, has high. 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.