Search Results - "Felch, K."

Recent Tests on 117.5 GHz and 170 GHz Gyrotrons by Felch, K, Blank, M, Borchard, P, Cauffman, S

“…Two megawatt-class gyrotrons at frequencies of 117.5 GHz and 170 GHz have recently been fabricated and tested at CPI. The 117.5 GHz gyrotron was designed to…”
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Gyrotrons for magnetic fusion applications at 110 GHz and 170 GHz by Felch, K., Blank, M., Borchard, P., Cahalan, P., Cauffman, S.

“…Two megawatt-class gyrotrons at frequencies of 110 GHz and 170 GHz have recently been fabricated at CPI. The 110 GHz gyrotron is designed to produce 1.2 MW of…”
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Startup scenarios in high-power gyrotrons by Nusinovich, G.S., Sinitsyn, O.V., Velikovich, L., Yeddulla, M., Antonsen, T.M., Vlasov, A.N., Cauffman, S.R., Felch, K.

“…To realize continuous-wave (CW) operation of millimeter-wave gyrotrons at megawatt (MW)-power levels, these devices must operate in very high-order modes. To…”
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Design and emission uniformity studies of a 1.5-MW gyrotron electron gun by Anderson, J.P., Korbly, S.E., Temkin, R.J., Shapiro, M.A., Felch, K.L., Cauffman, S.

“…We present the design and initial operation of a 96-kV 40-A magnetron injection gun for a 1.5-MW 110-GHz gyrotron. A critical parameter for the successful…”
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Demonstration of a high-power long-pulse 140-GHz gyrotron oscillator by Blank, M., Felch, K., Borchard, P., Cahalan, P., Cauffman, S.R., Tak Sum Chu, Jory, H.

“…A high-power long-pulse 140-GHz gyrotron oscillator has been designed, constructed, and tested. Key features of the gyrotron include an internal converter to…”
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Characteristics and applications of fast-wave gyrodevices by Felch, K.L., Danly, B.G., Jory, H.R., Kreischer, K.E., Lawson, W., Levush, B., Temkin, R.J.

“…Gyrodevice oscillators and amplifiers (or gyro-oscillators and gyro-amplifiers) are being utilized in a variety of applications where high power levels are…”
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Development and demonstration of high-average power W-band gyro-amplifiers for radar applications by Blank, M., Felch, K., James, B.G., Borchard, P., Cahalan, P., Chu, T.S., Jory, H., Danly, B.G., Levush, B., Calame, J.P., Nguyen, K.T., Pershing, D.E.

“…The results of a focused program to develop high-power W-band gyro-amplifiers, which culminated in the demonstration of record average output powers from…”
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Demonstration of a 263 GHz gyrotron for Dynamic Nuclear Polarization by Blank, M., Borchard, P., Cahalan, P., Cauffman, S., Felch, K., Rosay, M., Tometich, L.

“…Summary form only given: Dynamic nuclear polarization (DNP) can be used to increase the sensitivity of nuclear magnetic resonance (NMR) experiments by…”
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Electron gun and collector design for 94-GHz gyro-amplifiers by Nguyen, K.T., Danly, B.G., Levush, B., Blank, M., True, R., Good, G.R., Hargreaves, T.A., Felch, K., Borchard, P.

“…This paper presents the electrical design of a magnetron injection gun and collector for high peak and average power TE/sub 01/ W-band gyro-amplifiers. The…”
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Design and testing of a dual-frequency 104/140 GHz megawatt-class gyrotron for fusion plasma heating by Cauffman, S., Blank, M., Borchard, P., Felch, K.

“…Summary form only given. CPI's existing 140 GHz, 900 kW, long-pulse gyrotron design has been adapted to enable operation in an alternative mode at 104 GHz, in…”
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Simulation of beam collector nonuniformities in gyro-amplifiers by Calame, J.P., Danly, B.G., Levush, B., Blank, A., Felch, K.L., Nguyen, K.T.

“…The spiraling beams employed in gyro-amplifiers can create regions of enhanced local heating on the beam collector surface as a result of the turning-point…”
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Long-pulse and CW tests of a 110-GHz gyrotron with an internal, quasi-optical converter by Felch, K., Blank, M., Borchard, P., Tak Sum Chu, Feinstein, J., Jory, H.R., Lorbeck, J.A., Loring, C.M., Mizuhara, Y.M., Neilson, J.M., Schumacher, R., Temkin, R.J.

“…A high-power gyrotron, employing an internal converter that produces a Gaussian-like output mode, has been designed and tested. The tube employed a TE/sub…”
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Development and testing of a high-average power, 94-GHz gyroklystron by Danly, B.G., Blank, M., Calame, J.P., Levush, B., Nguyen, K.T., Pershing, D.E., Parker, R.K., Felch, K.L., James, B.G., Borchard, P., Cahalan, P., Chu, T.S., Jory, H.R., Hargreaves, T.A., True, R.B., Lawson, W.G., Antonsen, T.M.

“…The development of a 10-kW average power, 94-GHz gyroklystron amplifier is described. This average power was obtained with 11% radio frequency (RF) duty factor…”
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Testing of a Dual-Frequency 104/140 GHz Megawatt-Class Gyrotron for Fusion Plasma Heating by Cauffman, S., Blank, M., Borchard, P., Felch, K.

“…A dual-frequency gyrotron allowing operation at either 104 GHz or 140 GHz has been developed for use in plasma heating experiments at the W7-X stellarator at…”
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Gyrotrons for ECH applications by FELCH, K, HUEY, H, JORY, H

“…Gyrotron oscillators have served as effective sources for electron cyclotron heating (ECH) applications in the area of magnetic confinement fusion. Successful…”
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Testing of megawatt-class gyrotrons by Cauffman, S., Blank, M., Borchard, P., Felch, K.

“…CPI is developing gyrotrons for fusion plasma heating and current drive at several frequencies…”
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Testing of megawatt-class gyrotrons by Cauffman, S., Blank, M., Borchard, P., Felch, K.

“…Summary form only given. CPI is developing gyrotrons for fusion plasma heating and current drive at several frequencies. Several of these gyrotrons have…”
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A comparative study of three single-stage, depressed-collector designs for a 1-MW, CW gyrotron by Saraph, G.P., Felch, K.L., Feinstein, J., Borchard, P., Cauffman, S.R., Chu, S.

“…1-MW continuous-wave (CW) gyrotrons operating at 140 GHz are being developed for heating fusion plasmas. Energy recovery using a depressed collector is…”
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Design and tests of a gyrotron with a radially-extracted electron beam by Neilson, J.M., Felch, K., Tak Sum Chu, Feinstein, J., Hess, C., Huey, H.E., Jory, H.R., Mizuhara, Y.M., Schumacher, R.

“…A high-power gyrotron, employing an output coupling concept where the spent electron beam was extracted radially though a slot in the output waveguide, has…”
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Development of fusion gyrotrons at 110 GHz, 117.5 GHz, 140 GHz, AND 170 GHz by Cauffman, S., Blank, M., Borchard, P., Felch, K.

“…Summary form only given. CPI is currently developing megawatt-class gyrotrons for fusion plasma heating and current drive across a range of frequencies. These…”
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