Browsing William W. Destler--E-prints by Author "Rodgers, J."
Now showing items 1-20 of 33
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Characterization of electron beams generated in a high-voltage pulse-line-driven pseudospark discharge
Ramaswamy, K.; Destler, William; Segalov, Z.; Rodgers, J. (American Institute of Physics, 1994-05-01)Emittance and energy measurements have been performed on a high-brightness electron beam (>1010Nm2 rad2 ) with diameter in the range 1-3 mm and energy in the range 150-170 keY. This electron beam is generated by the ... -
Collective ion acceleration via laser controlled ionization channel
Destler, William; O'Shea, P.; Rodgers, J.; Segalov, Z. (Institute of Electrical and Electronics Engineers, 1987)Initial results from a successful laser-controlled collective ion acceleration experiment at the University of Maryland are presented. In the experiment, positive ions are trapped in the potential well at the head of ... -
Design of a high-efficiency low voltage axially modulated cusp-injected second-harmonic x-band gyrotron amplifier
Lawson, W.; Grigoropoulos, A.; Liu, A.; Saraph, G.; Rodgers, J.; Destler, William (©1996 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., 1996-06)We present the theoretical design of a secondharmonic small-orbit gyrotron amplifier which utilizes the interaction between a 35-kV 4-A beam and a TEoll cavity to produce over 70 kW of amplified power at 9.9 GHz in a ... -
Design of an efficient, low voltage, third harmonic, large-orbit gyrotron amplifier with a vane-resonator output cavity
Lawson, Wes; Destler, William; Fernandez, Anna; Liu, Arnold; Rodgers, J.; Weinstein, Jonathan (©1996 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., 1996-06)We present the design of a 100 kW, J-band, third harmonic large-orbit gyrotron amplifier which utilizes the interaction between a 45 kV, 4 A beam and a vane resonator output cavity operating in the “?r”-mode. An efficiency ... -
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 ... -
Experiemental study of interaction of microwaves with a nonmagnetized pulsed-plasma column
Signh, A.; Destler, William; Catravas, P.; Rodgers, J. (American Institute of Physics, 1992-09-01)The time evolution of backscattered and sidescattered microwaves from a plane conductor covered by a pulsed-plasma column has been studied; transmitted signals along the axial and transverse directions of the column have ... -
Experimental and numerical studies of sheet electron beam propagation through a planar wiggler magnet
Zhang, Ze-Xiang; Granatstein, Victor; Destler, William; Bidwell, Steven; Rodgers, J.; Cheng, S.; Antonsen, T.; Levush, B.; Radack, D. (IEEE, 1993-12)Detailed experimental studies on sheet relativistic electron beam propagation through a long planar wiggler are reported and compared with numerical simulations. The planar wiggler has 56 periods with a period of 9.6 ... -
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 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.R.; Destler, William; Granatstein, V.L.; Rodgers, J.; Kehs, R.A.; Minami, K. (IEEE, 1990-05-21)Summary form only given, as follows. It has previously been demonstrated that a plasma-loaded backward wave oscillator (BWO) powered by a relativistic electron beam can generate hundreds of megawatts of microwave radiation ... -
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) -
Experimental studies of high-power microwave reflection, transmission, and absorption from a plasma-covered plane conducting boundary
Destler, William; DeGrange, J.; Fleischmann, H.; Rodgers, J.; Segalov, Z. (The American Institute of Physics, 1991-05-01)Experimental studies of the reflection, transmission, and absorption of high-power microwave pulses from a plasma-covered plane conducting boundary are presented. Under optimum conditions, backscattered rf power is ... -
Experimental studies of the laser controlled collective ion accelerator
Destler, William; Rodgers, J.; Segalov, Z. (Copyright 1989 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics., 1989-10-01)Detailed experimental studies of a collective acceleration experiment in which a time sequenced laser-generated ionization channel is used to control the propagation of an intense relativistic electron bearnfront are ... -
Free electron laser with small period wiggler and sheet electron beam: A Study of the feasibility of operation at 300 GHz with 1 MW CW output power
Booske, J.; Granatstein, Victor; Antonsen, T.; Destler, William; Finn, J.; Latham, P.; Levush, B.; Mayergoyz, I.; Radack, D.; Rodgers, J. (1989)The use of a small period wiggler (Cw < 1 cm) together with a sheet electron beam has been proposed as a low cost source of power for electron cyclotron resonance heating (ECRH) in magnetic fusion plasmas. Other potential ... -
A fundamental mode, high-power, large-orbit gyrotron using a rectangular interaction region
Radack, D.J.; Ramaswamy, K.; Destler, William; Rodgers, J. (American Institute of Physics, 1993-06-15)This paper reports on experimental and theoretical studies of a fundamental mode, large-orbit gyrotron oscillator designed to produce high-power radiation in the rectangular TE,a mode at about 650 MHz. A basic linear ... -
High power high brightness electron beam generation in a pulse-line driven pseudospark discharge
Destler, William; Segalov, Z.; Rodgers, J.; Ramaswamy, K.; Reiser, M. (IEEE, 1993-05-17)High brightness (~3×1010 A/m2rad2 ), high power density (~1010 W/cm2) electron beams have been generated by the mating of a hollow-cathode discharge device operating in the pseudospark regime to the output of a high power ... -
High power, high brightness electron beam generation in a pulse-line driven pseudospark discharge
Destler, William; Segalov, Z.; Rodgers, J.; Ramaswamy, K.; Reiser, M. (IEEE Institute of Electrical and Electronics, 1993)High brightness (m 3 x 10" A/m2rad2), high power density (- 1O1O W/cm2) electron beams have been generated by the mating of a hollow-cathode discharge device operating in the pseudospark regime to the output of a high ... -
High-power microwave generation by excitation of a plasma-filled rippled boundary resonator
Carmel, Yuval; Minami, K.; Lou, Weiran; Kehs, R.; Destler, William; Granatstein, Victor; Abe, D.; Rodgers, J. (©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., 1990-06)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 ... -
A High-voltage triggered pseudospark discharge experiment
Ramaswamy, K.; Destler, William; Rodgers, J. (American Institute of Physics, 1996-11-01)The design and execution of a pulsed high-voltage (350–400 keV) triggered pseudospark discharge experiment is reported. Experimental studies were carried out to obtain an optimal design for stable and reliable pseudospark ...