Presidents (RIT): Recent submissions

Now showing items 101-120 of 144

    • 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 ...

    • 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 ...

    • A High-power millimeter-wave sheet beam free-electron laser amplifier 

      Cheng, Shiqiu; Destler, William; Granatstein, Victor; Antonsen, Thomas; Levush, Baruch; Rodgers, John; Zhang, Z. (©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)
      The results of experiments with a short period (9.6 mm) wiggler sheet electron beam (1.0 mm x 2.0 cm) millimeter-wave free electron laser (FEL) amplifier are presented. This FEL amplifier utilized a strong wiggler field ...

    • 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 ...

    • Microwave radiation from a low-energy rotating electron beam in an azimuthally periodic magnetic wiggler field 

      Chojnacki, R.; Destler, William (©1987 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., 1987-09)
      The generation of microwave radiation by the interaction of a low-energy rotating electron beam (25 kV, 0.5 A, 5 ps) with an azimuthally periodic magnetic wiggler field has been studied experimentally. Narrow-band ...

    • Short-pulse high-power microwave propagation in the atmosphere 

      Sullivan, C.; Destler, William; Rodgers, J.; Segalov, Z. (American Institute of Physics, 1988-02-12)
      The propagation of high-power 00-200 kW/cm2 ) short-burst (3-30 ns) microwave pulses in the atmosphere has been studied experimentally. Microwave power from a large orbit gyrotron operating at 9.6 GHz is focused by a ...

    • Propagation of wiggler focused relativistic sheet electron beams 

      Booske, J.; Destler, William; Segalov, Z.; Radack, D.; Rosenbury, E.; Rodgers, J.; Antonsen, T.; Granatstein, V.; Mayergoyz, I. (American Institute of Physics, 1988-02-09)
      A recent design concept for millimeter-wave free-electron lasers [J. Appl, Phys, 60, 521 ( 1986)] would require the stable propagation of a sheet electron beam through a narrow waveguide channel. Experimental results ...

    • Observation of a resonant enhancement of microwave radiation from a gas-filled backward wave oscillator 

      Minami, K.; Lou, W.; Destler, William; Kehs, R.; Granatstein, V.; Carmel, Y. (American Institute of Physics, 1988-08-15)
      High-power microwave radiation at 8 GHz from a gas-fined backward wave oscillator driven by an intense relativistic electron beam has been measured. It has been observed that an order of magnitude resonant increase in ...

    • 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 ...

    • Shielded-source, short-pulse microwave propagation experiments 

      Destler, William; Segalov, Z.; Rodgers, J. (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., 1989-08-01)
      The propagation of short-pulse, high-power microwaves through a neutral gas has been studied and breakdown limits determined in an experimental configuration in which the neutral gas test cell was carefully shielded from ...

    • 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 ...

    • Wiggler focused relativistic sheet beam propagation in a planar free-electron laser configuration 

      Radack, D.; Booske, J.; Carmel, Y.; Destler, William (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., 1989-11-13)
      The propagation of a relativistic sheet electron beam through a spatially periodic magnetic field (wiggler) has been studied experimentally. The wiggler serves two purposes; it provides beam focusing as well as the ...

    • 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 ...

    • Novel method for determining the elctromagnetic dispersion relation of periodic slow wave structures 

      Carmel, Y.; Guo, H.; Lou, R.; Abe, D.; Granatstein, V.; Destler, William (©1990 American Institute of Physics, 1990-09-24)
      A novel method for calculating the dispersion relation of electromagnetic modes in an arbitrary periodic slow wave structure is reported. In this method it is sufficient to know the frequencies corresponding to three special ...

    • 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)

    • Design of high-average-power near-millimeter free electron laser oscillators using short-period wigglers and sheet electron beams 

      Booske, John; Radack, Daniel; Antonsen, Thomas; Bidwell, Steven; Carmel, Yuval; Destler, William; Freund, Henry; Granatsein, Victor; Latham, Peter; Levush, Baruch; Mayergoyz, Isaak; Serbeto, A. (©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)
      The design and feasibility of a I-MW continuous wave (CW) free electron laser (FEL) oscillator are reviewed. The proposed configuration will include a short-period (1" - I cm) planar wiggler. a sheet electron beam, a ...

    • 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 ...

    • Free electron laser pumped by a powerful traveling electromagnetic wave 

      Kehs, R.; Carmel, Yuval; Granatstein, Victor; Destler, William (©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)
      A three-wave free-electron laser (FEL) was operated with a powerful 8.4-GHz electromagnetic “pump” wave replacing the usual magnetostatic wiggler. The presence of a uniform axial magnetic field B,, produced cyclotron-harmonic ...

    • Questions and Answers with Dr. A. Simone 

      Simone, Albert (2005-07)

    • Questions and Answers with Dr. A. Simone 

      Simone, Albert (2006-01)