Search Results - "Gamzina, Diana"

Nano-CNC Machining of Sub-THz Vacuum Electron Devices by Gamzina, Diana, Himes, Logan G., Barchfeld, Robert, Yuan Zheng, Popovic, Branko K., Paoloni, Claudio, EunMi Choi, Luhmann, Neville C.

“…Nano-computer numerical control (CNC) machining technology is employed for the fabrication of sub-THz (100-1000 GHz) vacuum electron devices. Submicron feature…”
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Characteristics and Processing of Hydrogen-Treated Copper Powders for EB-PBF Additive Manufacturing by Ledford, Christopher, Rock, Christopher, Carriere, Paul, Frigola, Pedro, Gamzina, Diana, Horn, Timothy

“…The fabrication of high purity copper using additive manufacturing has proven difficult because of oxidation of the powder feedstock. Here, we present work on…”
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UV Lithography and Molding Fabrication of Ultrathick Micrometallic Structures Using a KMPR Photoresist by Young-Min Shin, Gamzina, Diana, Barnett, Larry R, Yaghmaie, Frank, Baig, Anisullah, Luhmann, Neville C

“…By using a novel negative-tone photoresist, KMPR, we have investigated ultraviolet (UV) lithographic microelectroforming fabrication of ultrathick metallic…”
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Thermomechanical Fatigue in Sub-THz Vacuum Electron Devices by Gamzina, Diana, Ravani, Bahram

“…The transient temperature and stress distributions during the turn-on cycle of sub-THz vacuum electron devices (VEDs) are evaluated, thereby providing an…”
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Millimeter wave traveling wave tubes for the 21st Century by Paoloni, Claudio, Gamzina, Diana, Letizia, Rosa, Zheng, Yuan, Luhmann, Neville C.

“…Traveling wave tubes are rapidly evolving to provide unprecedented power level in comparison to solid state devices in the millimeter waves region of the…”
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Performance of a Nano-CNC Machined 220-GHz Traveling Wave Tube Amplifier by Baig, Anisullah, Gamzina, Diana, Kimura, Takuji, Atkinson, John, Domier, Calvin, Popovic, Branko, Himes, Logan, Barchfeld, Robert, Field, Mark, Luhmann, Neville C.

“…We report on hot test measurements of a wide-bandwidth, 220-GHz sheet beam traveling wave tube amplifier developed under the Defense advanced research projects…”
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Mechanical Design and Manufacturing of W-Band Sheet Beam Klystron by Gamzina, Diana, Barnett, Larry R., Ravani, Bahram, Luhmann, Neville C.

“…Development of high frequency, high-average power linear beam devices is hindered by the slow progress in advancement of suitable mechanical design and…”
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Compact \textit -Band Sheet Beam Folded Waveguide Traveling Wave Tube for High Data Rate Communication by Zheng, Yuan, Qiu, Shasha, Griffin, Blake, Kowalczyk, Rich, Luhmann, N. C., Gamzina, Diana

“…The design of a compact <inline-formula> <tex-math notation="LaTeX">\textit{E}</tex-math> </inline-formula>-band (71-76 GHz) sheet beam (SB) folded waveguide…”
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Compact E -Band Sheet Beam Folded Waveguide Traveling Wave Tube for High Data Rate Communication by Zheng, Yuan, Qiu, Shasha, Griffin, Blake, Kowalczyk, Rich, Luhmann, N. C., Gamzina, Diana

“…The design of a compact [Formula Omitted]-band (71–76 GHz) sheet beam (SB) folded waveguide (FWG) traveling wave tube (TWT) for high data rate communications…”
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Electron Beam Transport System for 263-GHz Sheet Beam TWT by Yuan Zheng, Gamzina, Diana, Popovic, Branko, Luhmann, Neville C.

“…The efficient transport of high current density electron beams is essential for the success of millimeter wave and terahertz vacuum devices. To achieve high…”
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Multioutput Circuit for Low Voltage Ultracompact W-Band Klystron by Zheng, Yuan, Sy, Ann, Weatherford, Brandon, Luhmann, N. C., Gamzina, Diana

“…In this article, the design, characterization, and manufacture of a circuit for a W-band, ultracompact continuous wave sheet beam klystron are described. This…”
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0.2-THz Dual Mode Sheet Beam Traveling Wave Tube by Yuan Zheng, Gamzina, Diana, Luhmann, Neville C.

“…Equipping the adjustable horizontal focusing electrodes (FEs), a dual mode electron gun providing different current beams, has been proposed and evaluated…”
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Development of a 100-W 200-GHz High Bandwidth mm-Wave Amplifier by Field, Mark, Kimura, Takuji, Atkinson, John, Gamzina, Diana, Luhmann, Neville C., Stockwell, Brad, Grant, Thomas J., Griffith, Zachary, Borwick, Robert, Hillman, Christopher, Brar, Berinder, Reed, Thomas, Rodwell, Mark, Shin, Young-Min, Barnett, Larry R., Baig, Anisullah, Popovic, Branko, Domier, Calvin, Barchfield, Robert, Zhao, Jinfeng, Higgins, John Aiden, Goren, Yehuda

“…A millimeter (mm) wave amplifier that combines both high-power output and a wide bandwidth would enable dramatic improvements in areas where high-power radio…”
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Fabrication of a 0.346-THz BWO for Plasma Diagnostics by Feng, Jinjun, Tang, Ye, Gamzina, Diana, Li, Xiang, Popovic, Branko, Gonzalez, Michelle, Himes, Logan, Barchfeld, Robert, Li, Hanyan, Pan, Pan, Letizia, Rosa, Paoloni, Claudio, Luhmann, Neville C.

“…Nuclear fusion energy is perhaps one of the most demanding challenges that the scientific community is facing. Unfortunately, the plasma is affected by…”
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Thermo-Mechanical Stress in High-Frequency Vacuum Electron Devices by Gamzina, Diana, Luhmann, Neville C., Ravani, Bahram

“…Analysis of the thermo-mechanical performance of high-frequency vacuum electron devices is essential to the advancement of RF sources towards high-power…”
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Design and Analysis of the Staggered Double Grating Slow Wave Circuit for 263 GHz Sheet Beam TWT by Zheng, Yuan, Gamzina, Diana, Himes, Logan, Gonzalez, Michelle, Luhmann, Neville C.

“…The complete design process of a high-frequency circuit for a 263 GHz staggered double grating, sheet beam traveling wave tube is presented in this article…”
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Terahertz vacuum electronic circuits fabricated by UV lithographic molding and deep reactive ion etching by Shin, Young-Min, Barnett, Larry R., Gamzina, Diana, Luhmann, Neville C., Field, Mark, Borwick, Robert

“…The 0.22 THz vacuum electronic circuits fabricated by UV lithography molding and deep reactive ion etching processes are under investigation for submillimeter…”
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Millimeter wave traveling wave tubes for the 21st Century by Paoloni, Claudio, Gamzina, Diana, Letizia, Rosa, Zheng, Yuan, Luhmann, Neville C.

“…Traveling wave tubes are rapidly evolving to provide unprecedented power level in comparison to solid state devices in the millimeter waves region of the…”
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THz Backward-Wave Oscillators for Plasma Diagnostic in Nuclear Fusion by Paoloni, Claudio, Gamzina, Diana, Himes, Logan, Popovic, Branko, Barchfeld, Robert, Lingna Yue, Yuan Zheng, Xiaopin Tang, Ye Tang, Pan Pan, Hanyan Li, Letizia, Rosa, Mineo, Mauro, Jinjun Feng, Luhmann, Neville C.

“…Understanding of the anomalous transport attributed to short-scale length microturbulence through collective scattering diagnostics is key to the development…”
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Nanoscale Surface Roughness Effects on THz Vacuum Electron Device Performance by Gamzina, Diana, Hanyan Li, Himes, Logan, Barchfeld, Robert, Popovic, Branko, Pan Pan, Letizia, Rosa, Mineo, Mauro, Jinjun Feng, Paoloni, Claudio, Luhmann, Neville C.

“…Vacuum electron devices are the most promising solution for the generation of watt-level power at millimeter wave and terahertz frequencies. However, the…”
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