Led digital metering for beam voltage, current and repeller voltage. Klystron, thermionic electron tube that generates or amplifies microwaves by controlling the speed of a stream of electrons. Thirteen compact klystron modulators 25 and 46 conventional klystron modulators 6 are now used. Feed the ttl signal of about 1khz square wave, to in post of buffer section. Peak power levels of megawatts, average power in kilowatts efficiency of greater than 50% possible allows rf energy to pass through the tube unaffected when not pulsed requires added stages of amplification because of low gain, e. The principal components of the new power supply are shown in fig.
Unmatched efficiency uses less power and produces less heat than any other khpa. Keep, the ammod amplitude knob and amfre knob at the mid position. Agilent e3640a e3649a programmable dc power supplies. Power is obtained from the combination of hundreds of transistor amplifier modules. As a result, the power supply can operate at constant current and constant power and so does not produce flicker, regardless of the switching frequency. Because the regulator sinks and sources the same energy during each pulse charge cycle, the regulator itself is nondissipative it uses no net power over a cycle.
Experiment4 study of the characteristics of the klystron tube. Modulator charging power supply design requirements 35 3. Keep, the ammod amplitude knob and amfre knob at the mid. As for ec, the development issues for the klystron relate mainly to the cooling of the structure. All klystron filaments are powered by ac power suppliers through isolated transformers. The power supply weight for this is at least 10 pounds, and not exactly portable. Instron model 8802, 8803, 8804, 8805 and 8806 load frames reference manual preinstallation m212880070 revision b. On the klystron power supply, vswr meter and cooling fan.
Design of the klystron filament power supply control. Klystron tube article about klystron tube by the free. Emi noise suppression in the klystron pulse power supply. As a result, the power supply can operate at constant current and power and thus does not produce flicker, regardless of the pulse frequency. Hewlett packard 715a klystron power supply hp microwave ebay. It also realizes a very small voltage ripple in the low. Klystron amplifier demands stringent performances from its bias power.
Items quantity klystron power supply 1 make raytheon power output 80 mwatts klystron tube 726 a sband power output 180mwatts make raytheon freq 3. All klystron modulators have pulseforming networks pfns. The power supply system for klystron cathode heater, based on the highvoltage gap transformer, has been developed to transfer 800 watts up to kv. The modulator is the dc power supply for the klystron. Braun, et al, a new method for rf power generation for twobeam linear colliders, aip conf. Em noise form klystron modulator power supply when the thyratron is triggered, the anode voltage droops 50 kv max, and the large current pulse flows from pfn capacitor to the pulse transformer and the klystron. Rosary international school, mumbai banglore highway, warje, pune 411052. In the unlikely event of a conflict between this text and established safety procedures, consult the relevant. This does not mean to imply that the reflex klystron will always oscillate if this transit time condition is met. The electron gun emits the electron beam, which passes through the gap in the anode cavity. The merits of the smps are low stored energy, small size, high rating efficiency and possible cost saving whereas the demerits are emi problem and system complexities. A wide variety of 2kw dc power supply options are available to you, there are 428 suppliers who sells 2kw dc power supply on, mainly located in asia.
This unit came from a working environment, but has not been tested please call for more information bmi surplus, inc. Klystron modes measurement of klystron characteristics. Over parts from more than 120 trusted brands, more parts added all the time. Within the bounds of a transmitting and receiving system, the properties of electromagnetic wave fields, such as propagation, reflection, refraction, interference, diffraction and polarization can be examined, using centimetre waves as an example. A crowbar circuit is an electrical circuit used for preventing an overvoltage condition of a power supply unit from damaging the circuits attached to the power supply. Pdf operation of crowbarless power supply for klystron. Cs6910 is a simple replacement for the bwo klystron. Nvis 102 klystron power supply is a stateoftheart solidstate, regulated power supply for operating low power klystrons. Reflex klystron consists of an electron gun, a cathode filament, an anode cavity, and an electrode at the cathode potential.
You can return any new or unused item within 10 days of the date your item was shipped and we will refund the full purchase price. If input b is more positive than input a, which diodes will be. The most basic configuration is the twocavity klystron. The rf source is a klystron amplifier see section 17. The astron variable 12 volt power supply is popular for converting 115 vac to 12vdc for powering cb radios, ham radios, car stereos, cellular phones, and many other portable electronics. Pdf cs6000 cs6000 milf18870 ws32883 p9492 milstd461c milstd462 milstd167, milstd202f, milstd740, mk92 magnetron radar mk92 reflex klystron frequency agility magnetron milstd740 power supply for magnetron klystron weapon klystron milstd462. In order to achieve better klystron preheat, a klystron filament power supply. Ion pump power supply vt69009 series high voltage cable vt69035 series xray shield kit vt69169 lifting attachment vt69219. Astron corporation power supplies free shipping on most. Jun 05, 2012 2 the current enters a standalone dc power supply.
Using a hipot high voltage 10kv, low current power supply. This power supply produces extremely high voltages. Constant current power supply a regulated power supply that acts to maintain its output current constant in spite of changes in load, line, temperature, etc. Klystron power supply, is a stateoftheart solidstate, regulated power supply for operating low power klystrons. In addition to older technology, klystron and magnetron tube systems also require large highvoltage power supply units housed in the transmitter cabinet. Klystrons make use of the transittime effect by varying the velocity of an electron beam. A klystron is a specialized linearbeam vacuum tube, invented in 1937 by american electrical engineers russell and sigurd varian, which is used as an amplifier for high radio frequencies, from uhf up into the microwave range. Hewlett packard 715a klystron power supply, when plugged in the unit shows it has power but nothing more has been checked. For high power systems, it is normal to have some value of series resistance between the beam supply and the klystron cathode. Klystron power supply skps 610 the model klystron power supply skps610 is. The top countries of suppliers are china, taiwan, china, from which the percentage of 2kw dc power supply supply is 99%, 1% respectively.
Jan 01, 2015 any regulated power supply for rf work basically does what all power supplies do. Features power saver and power tracker optimizing khpa efficiency to meet your. Connect the power supply cables with proper polarity to kit. Agilent e3640a e3649a programmable dc power supply speci. Change the meter switch of klystron power supply to beam voltage position,and rotate the beam voltage knob clockwise up to 300 v deflections in meter. Performance of the power supply as an application of the power supply, the klystron characteristics 2 studied using this power supply are shown in figure 2. Connect the detector output to y input and sawtooth output of the klystron of power supply to xinput of scope fig. The power electronics include a 500 kv multiplier power supply, a 10 kv grid modulator, a multiconcentric high voltage cable and an advanced, reentrant interface between the cable and the klystron figure 1. Electron gun power supply prometheus fusion perfection. Gen iv klystron hpa dbsband cpi dbsband gen iv klystron power amplifier for satellite uplink communications this hpa is equipped with an msdc klystron for high power and high efficiency. Klystron for high gradient accelerator research, in aip conf.
Gen iv klystron hpa dbsband cpi dbsband gen iv klystron. E3765,a is an sband high power amplifier klystron designed for industrial linear accelerators. A filament is a critical component of the klystron used to heat the cathode. Utilizing low power solidstate amplifiers, combined with pulse compression technology, endurance radars do not require these large power supply components and cut the transmitter.
Connect the other end of fiber to detector sfh 551v very carefully as per the instructions in step. While connecting this, ensure that the power supply is off. In microwave test bench, what is the difference between a. I have operated pieces of equipment producing 100mw output, but they required. The new hp model 71 5 a power supply shown in figure 1 has been designed specifically for this purpose. Solid state amplifiers are being increasingly used instead of electronic vacuum tubes to feed accelerating cavities with radio frequency power in the 100 kw range. Unfollow astron power supply to stop getting updates on your ebay feed. This limits tube current to a finite value if the tube should arc from cathode to ground. Reflex klystron working, oscillator and applegate diagram. December, 1950 a new lowpower klystron supply ai more and more types of lowpower klystrons have become available, need has grown for a small, benchtype power supply to operate these klystrons. Ac regulator based hvdc power supply is employed as klystron bias supply for indus2 synchrotron radiation source srs 1. Chand shine technologies offering klystron power supply in chaitanyapuri, hyderabad, telangana. The electrons are originally accelerated to high velocity by a potential of several hundred volts and enter a narrow gap that forms part of a cavity resonator system see figure, where they are acted upon by a radiofrequency field, which causes a. Periodic klystron maintenance if satcom klystrons are to be stored for extended periods, it is recommended that they be periodically checked for vacuum integrity.
The power output of the average klystron was about 10 to 20 milli watts. Marconi sanders type 6597 klystron power supply marconi instruments ltd c1965 acrobat 7 pdf 2. A reflex klystron is an obsolete type in which the electron beam was reflected back along its path by a high potential electrode, used as an oscillator. Regulated beam supply and repeller supply voltages digital lcd meter for beam voltage, current more. A klystron tube makes use of speedcontrolled streams of electrons that pass through a resonating cavity. Since the invention of the klystron in 1937, many different types and designs have been developed. They are velocitymodulated tubes that are used in radars as amplifiers or oscillators. Klystron microwave test bench gunn microwave test bench. Low power klystrons are used as oscillators in terrestrial microwave relay communications links, while high power klystrons are used as output tubes in.
The above power supply was designed and fabricated in nichicon corporation. A simple regulated power supply for characteristics. It operates by putting a short circuit or low resistance path across the voltage output v o, quite like were one to drop a crowbar across the output terminals of the power supply. In this video, i have explained reflex klystron with following points 1.
The klystron is used in television transmission, particle accelerators, and powerful radar, like that in the dew line which defended north america from attack. Klystron cathode heater power supply system based on the. Jan 16, 2017 a klystron is a specialized linearbeam vacuum tube, invented in 1937 by american electrical engineers russell and sigurd varian, which is used as an amplifier for high radio frequencies, from uhf up into the microwave range. The e3712 pulsed klystron is available with peak output power of 80 mw or 100 mw operating at 2,856 mhz. There are totally 44 klystrons in experimental advanced superconducting tokamak east lower hybrid current drive lhcd systems. The system includes two 220 kw switching power supplies, a 110 kv solid state hard switch pulse modulator, mod anode and filament power supplies, klystron fault protection, and interfaces to the isis controls. Telemark st series power supply instruction manual 4 safety warnings this power supply operates at a high enough voltage and possesses sufficient stored energy to be capable of killing a human do not take safety for granted pay strict attention to safety information and warnings in this manual.
Operating voltage 120 kv klystron current a the top duration pulse 1. Instron model 8802, 8803, 8804, 8805 and 8806 load frames. Pdf on apr 20, 2016, michael kempkes and others published pulsed power systems for ess klystrons find, read and cite all the research you need on researchgate. Ishikawa, scss group, rikenspring8, harima 6795148, japan abstract we have developed an inverter type highvoltage power supply for an oilfilled klystron modulator 12. At that moment, the em noise is generated by two mechanisms. Analog seekrets i safety notice no part of this text shall be used as a reason for breaking established safety procedures. Klystron switching power supplies for the international. It is essentially a transformer which steps the voltage down to 24v and then a rectifier which converts it to dc. Klystron power supply, model mw 2030 is a state of art solid state solid state, regulated power supply for operating low power klystrons. The output voltage rating of a power supply operating in the constant current mode analogous to the output current rating of a supply operating in the constant voltage mode. Microwave engineering reflex klystron tutorialspoint. Electrons in a klystron are accelerated to a controlled speed by the application of several hundred volts. The klystron was invented at stanford university in 1937 and originally used as the oscillator in radar receivers during world war ii.
Regulated beam supply and repeller supply voltages led digital meter for beam voltage, current and repeller voltage compact and reliable. Three power supply voltages are required to operate the tube. Feature regulated beam supply, repeller and filament supply voltages. Power transfer has been implemented by resonant way on the frequency of 19. Klystron bias power supplies for indus2 synchrotron. The name klystron comes from the greek verb klyzo referring to the action of waves breaking against a shore, and the suffix. A klystron uses the kinetic energy of an electron beam for the amplification of a highfrequency signal.
The curves are in good agreement with those plotted using conventional power supplies. The microwave power supply serves to operate the microwave transmitter with klystron. It consists of klystron power supply, klystron mount tube, isolator, variable attenuator, frequency meter, slotted line section, vswr meter and load. Regarding the charging method of pfn capacitors, compact modulator is a switching charging type using a capacitorcharging power supply ccps 25,711, and. Several distinguishing features of the astron vsm power supplies are the separate volt and amp meters, adjustable voltage range of 215 volts, and adjustable. Default sort product line az product line za new arrivals. A high power switching inverter unit eliminates the need for expensive and unstable crowbar circuits for the klystron power supply. A digitally controlled current regulated 20 v, 25 a dc power supply employing igbt based chopper is developed as the filament power supply for 1 mw, 352. Led digital meter for beam voltage, current and repeller voltage. Installation and operation of new klystron power supply with.