Many improved methods were used in designing the mode converter. E n e r g y we a p o n h o me ma d e a c ti v e d e n i. Zhang3 this is a preprint of a paper presented at the 10th joint workshop on electron cyclotron emission and electron cyclotron resonance heating, april 61 1. Gyrotrons for plasma experiments dutch institute for fundamental. Cpi mpp provides an extensive line of gyrotrons that cover frequencies from 28140 ghz with power levels ranging from 10 kw to 1. Design of 28 ghz 1 mw gyrotron a set of design parameters of 28 ghz gyrotron is shown in table 1. Gyrotron gaussian beam mode purity 95% loss budget cpi 28 ghz 10 kw industrial gyrotron applications.
Ecrf heating on cs reactors university of california. Design and experimental study of a high power 140 ghz. Cw gyrotrons now generate 110 ghz at megawatt power levels. While power handling of these loads is adequate, heat extraction for calorimetric measurements is relatively slow and reflected power is measur able. The output rf power and its frequency was measured. Commercial version of slac xl5 50 mw peak at 12 ghz designated cpi model vkx8311a 2 units being built for cern for clic. Abstracta short pulse high order mode gyrotron for 300 ghz oscillation was tested. A abstract gyrotrons are proving to be very reliable sources of high power at frequencies in the range of 28 to 170 ghz, where other sources are very limited in power capability. Afundamental link 5 swapan chattopadhyaycockeroftinstitute ofaccelerator. A complex cavity with gradual transition is employed in the gyrotron. Mirrors 1 and 2 were designed using analytic surfaces to shape the general wavefront curvature of the beam radiated from.
For rather high voltage variation of 95100 kv frequency of the 2 mw gyrotron was stable within 2 mhz. Injected rf forms a pulse train with 190 ms rf on and 10 ms off cycle. Progress in increasing gyrotron output power beyond 1 mw. A selfconsistent field nonlinear theory is used and numerical simulation results for electron beam interaction with te02te03 modes are given. Ech system and its application to long pulse discharge in. A gyrotron amplifier at 95 ghz has been demonstrated with a. Cpi shipped its first 527 ghz gyrotron, capable of cw operation with an output power of 25 w. Development and demonstration of a multimegawatt 95 ghz. Frequency stabilization of moderate power 263 ghz gyrotron by pll resulted in ultranarrow record oscillation spectrum width as 1 hz 16.
In the gyrotron, a rotating electron beam is created in a strong magnetic field 34,000 gauss. Their active denial system is basically a 100 kilowatt, 95 ghz gyrotron oscillator cpi vgb8095 feeding a highgain very narrow beamwidth, rotatable parabolic or phasedarray antenna. It operates at the fundamental harmonic with te02 circular mode. Development of 28 ghz1 mw gyrotron for gamma10 ecrh. We report the short pulse and cw operation of a 460 ghz gyrotron oscillator both. Diode magnetron injection gun for a 110 ghz gyrotron. Pdf design of 95 ghz, 100 kw gyrotron for active denial system. Design of transmission line at 28 ghz, 10 kw for ecr ion. Abstract a 95 ghz, multimegawatt continuouswave cw gyrotron oscillator is currently under development at cpi. The gyrotron is a compact tabletop device that allows convenient measurements in a biological setup.
Highpower gyrotrons for electron cyclotron heating and. Six, 110 ghz, 1 mw gyrotrons have been shipped by cpi to general atomics over the period 19992006 for use in ech experiments on the diiid tokamak. Relativistic effectsin microwavevacuumelectronics 1 michaeli. The 95 ghz gyrotron with the output power of 100 kw or. Home made active denial system directed energy weapon. Progress of 300 ghz high order mode gyrotron development. Oct 17, 2007 5 motivation the efficiency of 1 mw cw gyrotrons can be low. The mmwave source is a gyrotron, designed and built by cpi of palo alto, ca. The gyrotron employs a singleanode electron gun that produces a. Characteristics of diamond windows on the 1 mw, 110 ghz.
Request pdf recent tests on a multimegawatt 95 ghz gyrotron form only given. Design of 95 ghz gyrotron based on continuous operation. Cpi and slac have entered a collaborative agreement to expand existing technology into new power and frequency operating regimes, and the commercialization of high power devices. The electromagnetic theory, interaction theory, design processes, and experimental procedures are described in detail. Proceedings wpp 246 ivec 2005 sixth international vacuum electronics conference ivec 200ii 5 2022 april 2005 huis ter duin, noordwijk, the netherlands. Contents foreword m ivec2011 organisingcommittees v edstechnicalcommitteeon vacuumdevices vz inauguralsession pl1. In a recent collaboration between the national laboratories, industry, and universities, a high performance, 94 ghz gyroklystron was. Anderson submitted to the department of electrical engineering and computer science on 14 september 2004, in partial fulfillment of the requirements for the degree of doctor of philosophy abstract. A systematic theoretical and experimental study on 94ghz secondharmonic gyrotron with a superconducting magnet system is presented in this paper. A 1 mw gyrotron and a 10 kw gyrotron tucod05 proceedings of ecris08, chicago, il usa. It is a not lethal, antipersonnel, weapon that uses the directed energy. Felch, communications and power industrie s, palo alto, ca 94303, u.
Recent highpower gyrotron activities at 95, 110 and 170 ghz page 109 kevin felch communications and power industries llc. The gyrotron consists of a singleanode magnetron injection gun designed to operate at 75 a and 90 kv, a te 22,6 mode cylindrical interaction cavity, an internal mode converter to transform the te 22,6 mode to a gausssian beam, an edgecooled cvd diamond output window, and a singlestage. Recent tests on 500 kw and 1 mw, multisecondpulsed. We prepared one cw 84 ghz gyrotron cpi 2r for long time discharge experiments. A varian model vga8050m 28 ghz gyrotron that is capable of 200 kw in 0. The objective of this proposal is to develop a highpower 95 ghz millimeter wave rf vacuum source employing permanent or conventional solenoid magnets. The gyrotron that works on the frequency of 95 ghz and with output power of 100 kw was used as a source of millimetre radiation for ads active denial system. Defense technical information center compilation part.
Midpower 95 ghz gyrotron for measurements of various. Gyrotrons microwave power products division, communications. Figure 5 shows a 1 mw cw, 110 ghz, cpi gyrotron, figure 5. For example, cpi s model vgb8095 95ghz, 100kw gyrotron is part of the us air forces advanced nonlethal vehiclemounted active denial system. Ghz gyrotron operating in te15,1mode omega showed that stable operation can be achieved only in coaxial. The gyrotron produce long seconds to cw output pulses with powers uses a nbti superconducting magnet built by between about 10 kw and 2. During the initial experimental campaign peak output power levels up to 1 mw at 40a beam.
Gyrotrons the state of the art toshiba gycom thales cpi frequency 140 ghz ech system for the stellarator w7x. A mode converter is used to obtain te10 rectangular mode in standard wr10 components. Jaeritoshiba iapgycom fzkthales cpi ga tendencies in the development of highpower gyrotrons g. Gyrotron oscillators continue to be the main source of mmwave power for use in electron cyclotron heating ech experiments in magnetic fusion devices. Design of 95 ghz, 100 kw gyrotron for active denial system. The idea is for the highenergy rf beam to rapidly heat the outside layer of skin up to around f, causing the target to flee the immediate area. Design of transmission line at 28 ghz, 10 kw for ecr ion source in kbsi misook won, seyong choi, byoungseob lee, janghee yoon, jin yong park, byoung chul kim, jungwoo ok, kbsi, busan, korea abstract the 28 ghz gyrotron system was designed to deliver the microwave power from gyrotron oscillator to an. Startup scenario of this device is also studied using the nonstationary code magy, which is a tool for modeling slow and fast microwave sources. Design and experimental demonstration of a 94ghz gyrotron. Multimegawatt operation of a 95 ghz gyrotron1 kevin felch, monica blank, philipp borchard, pat cahalan, steve cauffman, communications and power industries, gyrotron team a 95 ghz gyrotron capable of generating cw power levels in excess of 2 mw is under development at cpi.
High power 95 ghz source with permanent or conventional solenoid magnets for active denial technology. A 10 kw, 28 ghz cpi heatwave model via301 gyrotron was used for the epresent xperiments. Nerves in the skin that cause pain are located at the same depth. Status of the 2 mw, 170 ghz coaxial cavity gyrotron for iter.
Midpower 95 ghz gyrotron for various applications moritz pilossof, roey benmoshe and moshe einat dept. A fourmirror internal quasioptical mode converter designed for a cpi gyrotron is discussed. Development of gyrotron with a coaxial cavity main efforts eu, earlier in russia iap ras gycom tpi hard structure and intense cooling of a gyrotron cavity provide good stability of. The gyrotron operates at te02 mode and second harmonic with output power of 5 kw. In the preliminary experiment, the 520 kw power was obtained at. Cfp09vamprt 9781424435005 2009 ieee international vacuum electronics conference.
Iap ras gycom tpi hard structure and intense cooling of a gyrotron cavity provide good stability of operating frequency. Design of 95 ghz gyrotron based on continuous operation copper solenoid with water cooling. Petelininstitute ofappliedphysics, nizhnynovgorod, russia plenary session1 pl2. Status and initial experimental results minimal mode conversion 4,5. Diiid echeccd experiments the new ability to modulate the gyrotron rf power with a feedback signal from the diiid pcs was used to control the profile of the plasma electron temperature during the early phase of a diiid shot. Here the design approach for 95 ghz gyrotron is slightly different as the combination of various indigenously developed and commercially available design codes is used effectively.
Iap gycom 170ghz gyrotron gycom, russia all inner surfaces. Review of the high power vacuum tube microwave sources. Mirrors 1 and 2 were designed using analytic surfaces to shape the general wavefront curvature of the beam radiated from the launcher. An immediate turnon time 95 ghz long pulse gyrotron with water cooled dc copper electromagnet is presented. Alexander alexandrovich kurayev belarus state university of informatics and radioelectronics.
Ceeri, india considering the application in strategic. The gyrotron consists of a singleanode magnetron injection gun designed to operate at 75 a. The designed oscillation mode is te 32,18 and the gyrotron is operated with a t superconducting magnet. The japan 170ghz iter gyrotron achieved 1 mw, 800 s at 55% efficiency and holds the energy world record of 2. For additional information on gyrotrons, other cpi products, or a copy of.
Recent developmenls on the 110 ghz electron cyclotron installation on the diiid tokamak each gyrotron system includes a 1 mw, 1 s inconellined tank dummy load. The gyrotron increases the total ecrh power on ldx by 60% from 16. Design and experimental study of a high power 140 ghz, te22. Gycom 30 ghz gyrotron and applicator cpi 28 ghz 10 kw industrial gyrotron. A high efficiency launcher and mirror system for use in a. To read and print pdf files, download adobe acrobat reader. Gyrotrons for dnp applications continuouswave gyrotrons first introduced for dnp applications by griffin and temkin at mit, usa. The gyrotron consists of a singleanode magnetron injection gun designed to operate at 75 a and 90 kv, a te 22,6 mode cylindrical interaction cavity, an internal mode converter to transform the te 22,6 mode to a gausssian beam, an edgecooled cvd diamond output window, and a. High power operation of a 170 ghz gyrotron for iter k. High frequency gyrotrons and their applications columbia apam. Michigan institute for plasma science and engineering seminar. Sex as a means of humiliation can be especially productive. Gyroklystrons offer the high power capability of gyrotrons and are appropriate for dods next generation radar and communications applications. Page 69 bonus seen at dayton page 70 the end editorial and rants.
The gyrotwa operates in the he 06 mode of an overmoded quasioptical waveguide using a gyrating electron beam. Temkin plasma fusion center, massachusetts institute of technology, cambridge, ma 029. Jan 22, 2015 a midpower 95 ghz gyrotron was built and used for measuring insertion loss of biological tissue. To obtain the maximum transmission line efficiency for both. The vgb8095 gyrotron provides up to 100 kw of continuous output power at 95 ghz, and employs a compact.
A continuouswave second harmonic gyrotron oscillator at. Demonstration of a 140ghz 1kw confocal gyrotraveling. Cw oscillators, gyrotrons microwave power products. Instruction manual df3 series high voltage power supply. Recenr developments on the 110 ghz electron cyclotron installation on the dilid tokamak 2. Design of transmission line at 28 ghz, 10 kw for ecr ion source in kbsi misook won, seyong choi, byoungseob lee, janghee yoon, jin yong park, byoung chul kim, jungwoo ok, kbsi, busan, korea abstract the 28 ghz gyrotron system was designed to. A fundamental frequency 670 ghz gyrotron with record power 210 kw and efficiency 20%. Tendencies in the development of highpower gyrotrons. A 10 kw, 28 ghz gyrotron has been added to the existing complement of four other ecrh sources consisting of. A 95 ghz gyrotron capable of generating cw power levels in excess of 2 mw is currently under development at cpi. A leading supplier of modernday gyrotrons is cpi, which has supplied the devices for applications as diverse as plasma heating, particle acceleration, highresolution radar systems, and nonlethal weapons.
Sbir navy high power 95 ghz source with permanent or. The gyrotron consists of a singleanode magnetron injection gun designed to operate at 75 a and 90 kv, a te 22,6 mode cylindrical interaction cavity, an internal mode converter to transform the te 22,6 mode to a gausssian beam, an edgecooled cvd diamond output window, and a single. The theory, design, and experimental results of a wideband 140ghz 1kw pulsed gyrotravelingwave amplifier gyrotwa are presented. Recent tests on a multimegawatt 95 ghz gyrotron request pdf. In view of the results, a contract was granted to ted for procurement of the first industrial prototype 3. High power operation of a 170 ghz gyrotron for iter. A 95 ghz midpower gyrotron for medical applications. The launcher was designed and analyzed using the tol and surf3d codes developed by ccr. Design and experimental study of a high power 140 ghz, te 22. A 95 ghz, multimegawatt continuouswave cw gyrotron oscillator is currently under development at cpi. Cpi gyrotrons with diamond windows are also installed and operating.
A 250 ghz photonic band gap gyrotron amplifier emilio a. Cpi 1 mw, 140 ghz gyrotron efficiency is cpi 100 kw, 95 ghz gyrotron efficiency 50%. Active denial technology adt is the term used to describe technology that uses radio frequency millimeter waves to produce an intolerable heating sensation compelling targeted individuals to instinctively move out of the beam. The design and development of 95 ghz gyrotron is planned at. Recent test results on a 95 ghz, 2 mw gyrotron request pdf.
915 1377 457 397 940 1491 1483 1583 112 50 1584 902 1439 1305 986 460 1576 370 1580 498 1054 1286 144 797 1336 47 1375 306 967 726 1182 460 499 1477 1074