Pdf multiphysics design of a magnetron high power transfer. Solid state power provides pure, clean rf heating with a rated lifetime of over 500,000 hours of use, versus only the few thousand hours typical of a magnetron. Techx designing magnetron sputtering configurations for lg. Ge spacemaker microwave magnetron tube replacement. A thick cylindrical cathode is present at the center and a cylindrical block of copper, is fixed. A wide variety of manufacturers, distributors and service companies are featured in our extensive vertical directory to allow ease sourcing and research for magnetron tubes. Magnetron sputtering design there is much more to designing a worldclass magnetron than simply strapping some magnets into a watercooled cavity and hoping for the best. The sizes of the cavities determine the resonant frequency, and thereby the frequency of emitted microwaves. A magnetron consists of a filament in the centre of the tube, acting as the cathode, with the anode body surrounding the filament. Sputtering magnetron design from angstrom science is a key benefit of all of our custom magnetrons from circular to linear to cylindrical. Cobham introduces simulation software for designing magnetron. A relativistic magnetron based upon axial extraction method has been designed and developed for linear induction accelerator400 lia400. Pdf design and simulation of 8cavity holeslot type magnetron in. Magnetron, diode vacuum tube consisting of a cylindrical straight wire cathode and a coaxial anode, between which a dc direct current potential creates an electric field.
It is typically used on microwave application that makes use of both electrical and magnetic current to produce an instant heat. Microwave design free microwave design software download. Its the magnetron that generates the microwaves that make the food hot. The result s hows that it is feasible and convenient to use three dimensional tool in the simulation of trajectory of electrons in a magnetron sputtering system. The first ever commercial model was created in 1954 but it didnt perform well with regards to sales. Magnetrons main components are the filament, magnets, yoke, anode core, cooling fins, vane, and the output antenna. A magnetron is a type of diode vacuum tube in which the filament also serves as the cathode.
Magnetron article about magnetron by the free dictionary. To me, the device is an educated vacuum tube diode with construction something like this. The solidstate transmitter also is found to output generally less thermal noise and fewer spurious signals than a vacuum device. Design of relativistic magnetron for high power microwave. To improve the efficiency of the mig design process, a design tool based on ansys workbench combining. The magnetron has become a household item since the introduction of microwave ovens into our kitchens. Mar 18, 2018 what is this in this video, i look at a microwaves radiation emitter. Products include microwave components, antennas,and plasmas to high speed digital system and accelerators. Magnetron vs solidstate precisepower software ptl2. It is built on a proven design that has worked for centuries but is now been updated with the latest radionics and sciatic research. The average output power is 0 1600 watts to a matched load in the frequency range from 2440 to 2460 mhz.
Also check that the cooling fan, if any, is working, has a free air path, and is pointed at the magnetron fins. Chapter 2 discusses the theory of magnetron operation, discussing design parameters, the bunemanhartree condition, and magnetron operation with a solid cathode. A type of vacuum tube used as the frequency source in microwave ovens, radar systems and other highpower microwave circuits. Magnetron vs solidstate industrial microwave dryers. Say good bye to the last vacuum tube product electronic design. Microwave office has revolutionized the communications design world by providing users with a superior choice. Satellite power system sps magnetron tube assessment study. Its services unit provides development and design, simulation,measurement and education. The history of the microwave oven home stratosphere. The software has been validated prior to release in cooperation with two commercial sputter coating companies. Bonding pyrolytic graphite to the magnetron anode 711 the manufacture of pyrolytic graphite and its fabrication into radiators 712 magnetic circuit study 715 design of interaction areas of magnetron 719 design of cathode for long life 723 mechanical design of the magnetron 724 projection of the characteristics of the magnetron package 726.
Operas efficiency also allows the analysis of multitarget coaters, where the additional complication of. The psionic magnetron manifestation tool is powerful and gets the results that you want quickly and easily. Buildup of kitchen grease on them can make the magnetron run too hot. The magnetron tube is what makes microwaves heat by producing radio waves that excite the water and fat molecules inside the food causing friction. Magnetron tubes remanufacturing services older magnetron tubes can be rebuilt to likenew specifications by the experts at penta labs iso 9001 certified. Multiple magnetron directional amplifiers can be put out together to form what is. The magnetron system is uniquely designed to work with the 2ohm and 4ohm amplifiers we recommend. This includes utilizing a new anode body while competitors typically use the old bodieswhich can have contaminated water jackets and machletts improved ribbed design ceramic. Lia400 system a repetitive pulse power system was developed which.
The magnetron is called as cavity magnetron because the anode is made into resonant cavities and a permanent magnet is used to produce a strong magnetic field, where the action of both of these make the device work. Relativistic magnetron design of the magnetron was done using charged particle simulation technique cst simulation software. The magnetron is a vacuum tube which is used in the generation of microwaves of high power. The author put forward the improvement measures on film coating process according to the simulation results. Connected to a resonant line, it can act as an oscillator.
I decided to research this a bit further i know, great timing and i found that some magnetrons contains berilyum oxide, which is fatal if you breathe it in. 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. There are still some other microwave tubes around like the klystrons in some. 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. Reheat leftovers or get popcorn ready for movie night with this countertop microwave oven. Custom magnetron designs are why so many oems turn to angstrom sciences. The microwave offers simple one touch controls including a popcorn button so you can sit back relax and wait for your delicious fluffy popcorn to be ready. All types of magnetron can be designed, be they circular, rectangular, balanced or unbalanced varieties. If you connect our system to a mismatched amplifier, circuit damage to your amplifier will result. Advanced rf amplifier system solutions crescend technologies.
Solidstate technology suitable for radar applications. Ge spacemaker microwave magnetron tube replacement if you have a ge spacemaker microwave with a bad magnetron tube this page can help. The amplifier exhibited a spectral noise density of 196db below the carrier, which is a very low level of noise. Some of these fuses reset once the device cools, some dont. 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. A brief look at what a magnetron actually consists of is worth a look. Designing magnetron sputtering configurations for lg problem description magnetron sputtering is used as a plasma processing technique to deposit very thin films onto a substrates for a wide variety of commercial manufacturing and scientific purposes in areas such as optics, electronics and packaging. Electrons pass by the openings to these cavities and cause microwaves to oscillate within, similar to the way a whistle produces. The noise emission from a microwave oven magnetron used in a directional amplifier was determined. The affordable amplifiers we recommend can be purchased online through sites like amazon and ebay. These multicavity devices may be used in radar transmitters as either pulsed or cw oscillators at frequencies ranging from.
In a conventional electron tube vacuum tube, electrons are emitted from a negatively. This magnetron was designed for an output microwave frequency of 2. Its working principle is based on the interaction between electron stream and magnetic field. High power magnetron keysight eesof applications keysight. May 23, 20 the magnetron is a vacuum tube which is used in the generation of microwaves of high power. This paper proposes a particular design technique of an xband magnetron to linear accelerator. Sputtering magnetron design custom circular linear. Smc1842cs model is a perfect option for builtin and also fits nicely on a countertop kitchen display. If you have a ge spacemaker microwave with a bad magnetron tube this page can help. You need to replace the diode anyway when you replace the magnetron, so its really not going to cost extra.
This paper describes the design of an xband magnetron to linear accelerator linac high power transfer system consisting in an 8 resonant cavities magnetron connected to a dedicated vacuum. Pulse power systems are widely used for high power microwave hpm generation, flash xrays fxr production and intense electron beam applications. However, todays users are turning to solid state solutions which provide significant advantages including precision power, frequency and phase control with ultrafast response time. The design of the microwaves chassis made installing this magnetron a pita. Simulation of the trajectory of electrons in a magnetron. The tube is a package magnet type and requires forced air cooling. Magnetron has become the most widely used vacuum tube. Welcome to the premier industrial magnetron tubes resource. Simple, easy and cheap home built dc magnetron sputtering machine but has enough potential to deposit smooth and uniform reflective copper film. Before you buy a new magnetron, replace the diode first.
Computational design and optimization of a magnetron. Vacuum tubes disappeared from electronic products years ago. Second thing is that an open magnetron tube will cook you and anyone nearby with microwaves, and metal objects will have arcs of mini lightning bolts coming off of them. The design features of this relativistic magnetron are presented here. Cross section of magnetron design showing permanent magnets. Satellite power system sps magnetron tube assessment. The magnetron tube works on dc direct current power. Magnetron sputter coater design software design flexibility with the opera software the user has complete freedom to specify the device. I took apart a microwave, and when i saw the magnetron, i conviniently remembered that i had heard that magnetrons were dangerous. Broadband twtas are particularly notorious for their ability to output substantial power as harmonic content when operating at their fullrated capacity, in some cases putting out as much or more power at the second harmonic than is realized at the fundamental.
There is a slim chance that this peice has failed and thats why the magnetron isnt working. Chapter 3 discusses the software including a brief description of the 3d code magic. First magnetron tube was invented in 1940 at englands university by john randall and harry boot. Crossed electron and magnetic fields are used in the magnetron to produce the highpower output required in radar equipment. The magnetron injection gun mig is an important component in a gyrotravelling wave tube. The new magnetron sputter version of opera provides a complete suite of threedimensional 3d tools for the finite element modeling, simulation, analysis and optimisation of magnetron sputtering equipment. The cavity magnetron is a highpowered vacuum tube that generates microwaves using the interaction of a stream of. Psionic magnetron manifestation tool psionic warriors.
Somewhere on the magnetron is a thermal fuse or cutoff. The magnetron is a highpowered vacuum tube that works as a selfexcited microwave oscillator. This is the second time i have replaced this magnetron so the average 7 year lifespan of the tube seems to be about right. When my microwave started cutting out, all it took was a good magnetron cleaning to get it running again.
This study has made it possible to much more accurately define the design of the. What is this in this video, i look at a microwaves radiation emitter. Almost certainly there is a microprocessor driving the display and keys to enter the timepowerstartstop and so on. A magnetic field is applied longitudinally by an external magnet.
The microprocessor requires a power source and this is one of the first things to suspect as being faulty if the unit doesnt work. In radar, magnetrons can be used as the signal source to feed the power stage of the radar transmitter, typically a klystron tube. The most important thing we build is trust automation. Microwave office rfmicrowave design software is the industrys fastest growing microwave design platform. Home built desktop dc magnetron sputtering machine youtube. You can replace the fuse, temp rating is usually written on the device itself. Magnetron, and microwave electrical engineering stack exchange. In 1965, the amana corporation was bought by raytheon, and they made the first homeapplicable model of the microwave oven in 1967. Tyne gives examples of early experiments on tubes where magnetic fields generated by solenoids control the flow of electrons.
Benford, history and future of the relativistic magnetron, in proceedings of the international conference on the origins and evolution of the cavity magnetron, bournemouth, uk, april 2010 ieee, 2010, pp. The filament and anode body are packed into a single device together with permanent magnets and, is some cases, additional electromagnetic coils, which permit to control and vary the output power of the magnetron. When the magnetron gets to hot, it shuts off power to the device. The output is fed either into a rectangular waveguide or into a heating oven directly. Reassembly was straightforward and im good for another 7 years.
834 206 1383 390 133 382 1226 435 507 662 1242 252 787 580 563 922 981 666 1300 449 1411 846 941 493 797 397 143 26 1406 869 1406 1327 1452 997 865 785 1343 1412