The waveguide channels microwaves to a fanlike device called a stirrer which disperses them inside the oven cavity. Cavity magnetron depend upon the interaction of electrons with a rotating electromagnetic eld of constant angular velocity. The distance between the target surface and the substrate holder was also kept constant at 90 mm. The magnetron tube works on dc direct current power. This induces polar molecules in the food to rotate and produce thermal energy in a process known as dielectric heating. Coaxial magnetron article about coaxial magnetron by the. Modification of microwave oven magnetron showing 1 magnetron stripped of cooling fins and ceramic magnets 2buckboost coil,3coldrolled steel shell,and 4 samarium cobalt magnets insideends of each portion of shell. New dual magnetron plasma source designed for large area. Design, construction and characterisation of a variable. The linking slots are parallel to the axis of the magnetron in the rear walls of each other resonator. Following equation or formula is used for magnetron calculator. Magnetron sputtering overview angstrom engineering. As we know tube devices used for microwave signal generation and microwave signal amplification can be broadly categorized into linear beam and cross field. The microwave oven has basically 2 sections, the low voltage section which actually controls the unit and the high voltage section whose components include the magnetron and the components that power up.
Effect of gas pressure and flow rate on the plasma power. Each angstrom sciences magnetron is machined from solid 304 stainless steel, aircraft grade 6061 aluminum and ofhc copper, ensuring magnetic and electrical integrity for longterm, reliable operation. In this video, i have explained following topics regarding magnetron. Magnetron is a fast paced arcade game that will keep you on toes, can you survive 30 levels of carnage. The main consideration of this thesis will be the glow discharge process, and in particular magnetron sputtering techniques will be examined in detail. The connecting slots are parallel to the axis of the magnetron in the rear walls of every other resonator. Unlike other appliances, the microwave oven is highvoltage and highcurrent equipment. Korobeinikov offered magnetron effects for heating, it was published in new energy technologies 2, 2005. A magnetron is a microwave oscillator that consists of a diode and a. Throughout the work presented here, the distance between the anode and the target surface cathode was kept constant at 3 mm. Continuous wave magnetrons are used for plasma processing in the manufacture of semiconductors and in industrial dielectric heating applications. Crossed electron and magnetic fields are used in the magnetron to produce the highpower output required in radar equipment.
New dual magnetron plasma source designed for large area substrate pretreatment and oxide film deposition p. Why magnetrons fail 1 why magnetrons fail understanding points of breakdown for these key components is crucial to maintaining roi no component is more critical to an industrial microwave system than the magnetron, and none is more complex and, therefore, subject to failure from a variety of causes. Pdf a magnetron sputtering device has been designed, built and tested in the physics laboratory of the. Electrons pass by the openings to these cavities and cause microwaves to oscillate within, similar to the way a whistle produces a tone when excited by an air stream blown past its. Buildup of kitchen grease on them can make the magnetron run too hot. The cathode and filament are at the center of the tube and are supported by the filament leads. Magnetron high power system design article pdf available in international journal of simulation. Design, construction, and optimization of a magnetron. Us3493810a us3493810da us3493810a us 3493810 a us3493810 a us 3493810a us 3493810d a us3493810d a us 3493810da us 3493810 a us3493810 a us 3493810a authority us united states prior art keywords container magnetron cooling portion pole pieces prior art date 19680216 legal status the legal status is an assumption and is not a legal conclusion. However, many applications in various industrial fields also need oxides, nitrides, or carbides. Magnetron sputtering of metals is not a big challenge if the target surface is clean and proper process conditions base pressure, process pressure, and power are applied. Pdf format this is an excellent, concise account of how magnetrons developed around the time of world war ii in the united states, the uk, and canada. The magnetron is a highpowered vacuum tube that works as a selfexcited microwave oscillator. This research project has several stages of development.
Magnetron sputtering is a deposition technology involving a gaseous plasma which is generated and confined to a space containing the material to be deposited the target. The anode of a magnetron is fabricated into a cylindrical solid copper block. The filament leads are large and rigid enough to keep the cathode and. Cavity magnetron or magnetron oscillator in microwave. Magnetron construction modern microwave oven this description is specifically for the 2m214 which i disassembled or similar types used in the majority of mediumtohigh power units. Magnetic lines of force are parallel to the geometric axis of this structure. Cwm10s microdry incorporated 5901 west highway 22 crestwood ky, 40014 ph. The cavity magnetron is a highpowered vacuum tube that generates microwaves using the interaction of a stream of electrons with a magnetic field while moving past a series of open metal cavities cavity resonators. The physical construction of a vacuum tube causes the output power and available gain to decrease with increasing frequency. Complete patent searching database and patent data analytics services. Highly efficient water heaters using magnetron effects technical task of this project is maximum heat output and minimum electric input of power. When my microwave started cutting out, all it took was a good magnetron cleaning to get it running again.
Their lowimpedance design provide rf, dc, mid frequency dc, pulse dc, and microwave power compatibility. Ilya uvaydov, owner of urban appliances repair in daly city, california, says the only microwaves he typically repairs are highend models made by viking, thermador and other luxury brands. Magnetron sputtering system industry is classified on the basis of geography as north america, latin america, western europe, eastern europe, asia pacific, japan and middle east and africa. Numerical studies and optimization of magnetron with diffraction. Pdf construction and performance of a magnetron sputtering. The surface of the target is eroded by highenergy ions within the plasma, and the liberated atoms travel through the vacuum environment and deposit onto a substrate. The cavity magnetron is a highpowered vacuum tube that generates microwaves using the. However, nearly all other magnetrons used in modern domestic microwave ovens should be very similar. The magnetron is a vacuum tube which is used in the generation of microwaves of high power. Table 1 gives an overview of the most important compound films.
Robust mechanical and electrical construction corrosion resistant and modular magnet bars optimized magnetics to maximize bulk target erosion and deposited film uniformity profiled magnetics to reduce the separation distance between adjacent racetracks vapor phase efficiency. These multicavity devices may be used in radar transmitters as either pulsed or cw oscillators at frequencies ranging from approximately 600 to 95,000 megahertz. Be sure that the magnetron gasket is properly installed around the dome of the tube whenever installing the magnetron. The structure of this thesis follows the above discussed approach. Angstrom sciences has developed cylindrical magnetron technology that embody. A microwave oven commonly referred to as a microwave is an electric oven that heats and cooks food by exposing it to electromagnetic radiation in the microwave frequency range. Drawboard pdf is the most intuitive pdf app on the microsoft store. Its working principle is based on the interaction between electron stream and magnetic field. Simplified model for the dc planar magnetron discharge ugent biblio. In a magnetron, the source of electrons is a heated cathode located on the axis of an anode structure containing a number of microwave resonators. Coaxial magnetrons are used in various types of ground and airborne radar sets.
Never operate the magnetron unless it is properly installed. The devices are used in radar, and microwave ovens, where the radiation causes the molecules in. A magnetron uses this direct current and generates microwaves with a frequency of 2450 megacyles per second or 2. Coaxial magnetron market is categorized based on product type, applications, and geography. In this video, i have explained following topics regarding magnetron oscillator. Satellite power system sps magnetron tube assessment. Magnetron repair service benefits capabilities magnetron repairs and refurbishments circular and linear magnetron expertise service up to four meter long magnetrons inhouse vacuumleak testing for hv and uhv designs magnet mapping performed on all repaired and refurbished units repair all major manufacturers models. Another difference you will notice is that the 2j51 magnetron uses.
A magnetron is a device that uses the interaction of a stream of electrons, guided by a magnetic field, with cavities within a block of copper to produce microwave radiation. Closeup view of magnetron with buckboost coil fitted to waveguide in phase and amplitude tracking test bed. Also check that the cooling fan, if any, is working, has a free air path, and is pointed at the magnetron fins. Microwave ovens heat foods quickly and efficiently because excitation is fairly uniform in the. Magnetron zero mode, magnetron pi mode, magnetron mode. Magnetron free download as powerpoint presentation.
It consists of anode and cathode poles and a permanent magnet. Review of the relativistic magnetron by dmitrii andreev, artem kuskov, and edl schamiloglu. The design and construction of a functional and robust variable balance magnetron sputtering system. This thesis is brought to you for free and open access by the electrical.
First magnetron tube was invented in 1940 at englands university by john randall and harry boot. What is this in this video, i look at a microwaves radiation emitter. Physical construction of a magnetron the magnetron is classed as a diode because it has no grid. In house development and construction of most parts and the use of readily available parts in some. At the opposite extreme, with no field, the electrons are free to flow straight. Notes on the troubleshooting and repair of microwave ovens. Magnetron sputtering system market size, 2018 industry.
The microwaves are directed by an antenna at the top of the magnetron into a waveguide. Magnetron sputtering system market is segmented by distribution channel as online stores, specialty stores and others. Magnetron sputtering especially closedfield unbalanced magnetron configuration has gained wide acceptance in both research and commercial purposes and is routinely used in different industries. A magnetron has a coaxial resonator about the anode unit and is connected by slots with the resonators of the unit. Of all kitchen appliances, microwaves are probably the least expensive to replace, especially the smaller, lowercost models. Highly efficient water heaters using magnetron effects. Business plan for the small construction firm management and planning series table of contents introduction a note on using this publication 1 whats in this for you. Magnetron, coaxial a magnetron with a coaxial resonator around the anode unit and connected by slots with the resonators of the unit.
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