Browsing Office of the President (RIT) by Author "Granatstein, V."
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Absolute instability for enhanced radiation from a high-power plasma filled backward wave oscillator
Minami, K.; Ali, M.; Ogura, K.; Hosokawa, T.; Kazama, H.; Ozawa, T.; Watanabe, T.; Granatstein, V.; Destler, William; Kehs, R.; Carmel, Y.; Lou, W.; Abe, D. (©1990 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE., 1990) -
Analysis of the electromagnetic waves in an overmoded finite length slow wave structure
Amin, Rahul; Ogura, K.; Kitamura, H.; Minami, K.; Watanabe, T.; Carmel, Y.; Main, W.; Weaver, J.; Destler, William; Granatstein, V. (©1995 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE., 1995-04)The electromagnetic fields of the higher order axial resonant modes in a slow wave structure are analyzed and found to have considerably different characteristics from those of the conventional fundamental mode. Here, ... -
Beam conditioning for electron energy recovery systems in devices employing axis-encircling beams
Singh, A.; Lawson, W.; Goutos, D.; Hix, W.; Striffler, C.; Granatstein, V.; Destler, William (Taylor & Francis, 1988)Depressed collectors are extensively used in linear-beam devices. In spiraling beam devices, the motion of the spent beam needs to be converted into axial motion before it can deliver energy to the retarding axial ... -
Can plasma microwave devices revitalize and broaden the scientific and technological base of microwave sources?
Carmel, Y.; Antonsen, T. Jr; Levush, B.; Nusinovich, G.; Destler, William; Granatstein, V. (1994-06) -
Demonstration of efficiency enhancement in a high-power backward-wave oscillator by plasma injection
Carmel, Y.; Minami, K.; Kehs, R.; Destler, William; Granatstein, V.; Abe, D.; Lou, W. (American Physical Society, 1989-05-15)An experimental demonstration of a strong enhancement of the interaction efficiency in a high-power relativistic backward-wave oscillator when plasma is injected is presented. Controlled plasma injection enhances the ... -
Demonstration of efficiency enhancement on a high-power backward-wave oscillator by plasma injection
Carmel, Y.; Minami, K.; Kehs, R.; Destler, William; Granatstein, V.; Abe, D.; Lou, W. (American Physical Society, 1989)An experimental demonstration of a strong enhancement of the interaction efficiency in a high-power relativistic backward-wave oscillator when plasma is injected is presented. Controlled plasma injection enhances the ... -
Depressed collectors for a large orbit gyrotron
Singh, A.; Goutos, D.; Hix, W.; Lawson, W.; Striffler, C.; Granatstein, V.; Destler, William (1987-12)An auxiliary magnetic cusp transforms rotational motion in the spent beam of a Large-Orbit Gyrotron into axial motion. Results regarding the interfacing of this cusp with a depressed collector region and the effects ... -
Design of a short-period-wiggler free electron laser experiment
Booske, J.; Antonsen, T. Jr; Bengston, D.; Bluem, H.; Destler, William; Granatstein, V.; Latham, P.; Mayergoyz, I.; Radack, D.; Rosenbury, T.; Striffler, C. (Institute of Electrical and Electronics Engineers, 1987-06) -
Efficiency enhancement by using depressed collector techniques in devices employing gyrating electron beams
Singh, Amarjit; Chojnacki, E.; Destler, William; Goutos, D.; Granatstein, V.; Lawson, W.; Striffler, C. (Institute of Electrical and Electronics Engineers, 1987-06) -
Electromagentic properties of corrugated and smooth waveguides filled with radially inhomogeneous plasma
Shkvarunets, A.; Kobayashi, S.; Weaver, J.; Carmel, Y.; Rodgers, J.; Antonsen, T. Jr; Granatstein, V.; Destler, William (Institute of Electrical and Electronics Engineers, 1996)No abstract found. -
Electromagnetic properties of open and closed overmoded slow-wave resonators for interaction with relativistic electron beams
Main, W.; Carmel, Y.; Ogura, K.; Weaver, J.; Nusinovich, G.; Kobayashi, S.; Tate, J.; Rodgers, J.; Bromborsky, A.; Watanabe, S.; Amin, M.; Minami, K.; Destler, William; Granatstein, V. (©1994 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE., 1994-10)Specific slow wave structures are needed in order to produce coherent Cherenkov radiation in overmoded relativistic generators. The electromagnetic characteristics of such slow wave, resonant, finite length structures ... -
Experimental development of a millimeter wave free electron laser
Radack, D.; Bidwell, S.; Antonsen, T. Jr; Carmel, Y.; Destler, William; Granatstein, V.; Latham, P.; Levush, B.; Mayergoyz, I.; Rodgers, J.; Zhang, Z. (SPIE, 1990-12)A 1 MW (cw), millimeter wave FEL (X, « 0.5 mm) is currently under development with an application for heating fusion plasmas. Two salient features of the FEL are the use of a short-period wiggler £w < 10 mm) electromagnet and ... -
Experimental high power plasma-filled backward wave oscillator results
Minami, K.; Lou, W.; Destler, William; Kems, R.; Granatstein, V.; Carmel, Y. (Institute of Electrical and Electronics Engineers, 1988-06) -
Experimental realization of millimeter-wave amplification by a sheet beam free electron laser
Zhang, Ze-Xiang; Destler, William; Granatstein, V.; Antonsen, T.; Levush, B.; Rodgers, J.; Cheng, S. (American Institute of Physics, 1994-03-14)We report an observation of millimeter-wave (94 GHz) amplification in a sheet beam, short period, planar wiggler: free electron laser amplifier. The observed gain is about 5 dB for a 530 keV, 4 A beam through a 54 cm ... -
Experimental studies of high power plasma filled backward wave oscillators
Carmel, Y.; Lou, W.; Destler, William; Granatstein, V.; Rodgers, J.; Kehs, R.; Minami, K. (1990-05-22) -
High power plasma filled backward wave oscillators
Destler, William; Minami, K.; Lou, W.; Carmel, Y.; Granatstein, V.; Kehs, R. (SPIE, 1988-01)Relativistic backward wave oscillators (BWOs) have proven to be relatively efficient, high-power microwave sources in the centimeter wavelength range. Recent Soviet results have indicated that the use of a background ... -
High-average-power CW FELs for application to plasma heating designs and experiments
Booske, J.; Granatstein, V.; Radack, D.; Antonsen, T.; Bidwell, S.; Carmel, Y.; Destler, William; Latham, O.; Levush, B.; Mayergoyz, I.; Zhang, Z. (IEEE, 1990)A short-period-wiggler (period - 1 cm), sheet-beam FEL has been proposed as a low-cost source of high-average-power (1 MW) millimeter-wave radiation for plasma heating and space-based radar applications. Recent calculations ... -
Investigations of the electromagnetic properties of finite length x-band slow-wave structures
Main, W.; Carmel, Y.; Ogura, K.; Weaver, J.; Tate, J.; Watanabe, S.; Nusinovitch, G.; Destler, William; Granatstein, V. (1993-06-07) -
Linear analysis of a finite length plasma-filled backward wave oscillator
Ali, M.; Orgura, K.; Minami, K.; Destler, William; Granatstein, V. (American Institute of Physics, 1992-04)Absolute instability in a plasma-filled backward wave oscillator with sinusoidally corrugated slow wave structure driven by an intense relativistic electron beam has been analyzed numerically. The maximum spatial growth ... -
Low-voltage, megawatt free-electron lasers at a frequency near 300 GHz
Booske, J.; Granatstein, V.; Antonsen, T. Jr; Destler, William; Levush, B.; Mayergoyz, I.; Radack, D.; Rodgers, J.; Rosenbury, E.; Segalov, Z.; Serbeto, A. (SPIE, 1988-01)Design procedures and beam transport feasibility experiments Il.re discussed for a novel, millimeter-wave free electron laser (FEL) concept employing short period magnetic undulators and a sheet electron beam. The ...