Search Results - "Tantawi, S. G."

High gradient experiments with X -band cryogenic copper accelerating cavities by Cahill, A. D., Rosenzweig, J. B., Dolgashev, V. A., Tantawi, S. G., Weathersby, S.

“…Vacuum radio-frequency (rf) breakdown is one of the major factors that limit operating accelerating gradients in rf particle accelerators. The occurrence of rf…”
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rf losses in a high gradient cryogenic copper cavity by Cahill, A. D., Rosenzweig, J. B., Dolgashev, V. A., Li, Z., Tantawi, S. G., Weathersby, S.

“…The development of high brightness electron sources can enable an increase in performance and reduction in size of extreme X-ray sources such as free electron…”
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X -band active-passive rf pulse compressor with plasma switches by Vikharev, A. L., Ivanov, O. A., Gorbachev, A. M., Lobaev, M. A., Isaev, V. A., Tantawi, S. G., Lewandowski, J. R., Hirshfield, J. L.

“…As proposed by SLAC, the efficiency of a pulse compressor of the SLED-II type could be increased by changing both the phase of the microwave source and the…”
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A Novel Circular TE01-Mode Bend for Ultra-High-Power Applications by Tantawi, S. G.

“…Future Linear Colliders and Accelerators require rf systems and components that are capable of handling hundreds of megawatts power levels at x-band…”
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Multimoded rf delay line distribution system for the Next Linear Collider by Tantawi, S. G., Nantista, C., Kroll, N., Li, Z., Miller, R., Ruth, R., Wilson, P., Neilson, J.

“…The delay line distribution system is an alternative to conventional pulse compression, which enhances the peak power of rf sources while matching the long…”
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Technological issues and high gradient test results on X-band molybdenum accelerating structures by Spataro, B., Alesini, D., Chimenti, V., Dolgashev, V., Haase, A., Tantawi, S.G., Higashi, Y., Marrelli, C., Mostacci, A., Parodi, R., Yeremian, A.D.

“…Two 11.424 GHz single cell standing wave accelerating structures have been fabricated for high gradient RF breakdown studies. Both are brazed structures: one…”
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High-power comparison among brazed, clamped and electroformed X-band cavities by Spataro, B., Alesini, D., Chimenti, V., Dolgashev, V., Higashi, Y., Migliorati, M., Mostacci, A., Parodi, R., Tantawi, S.G., Yeremian, A.D.

“…We report the building procedure of X-band copper structures using the electroforming and electroplating techniques. These techniques allow the deposition of…”
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Progress Toward Externally Powered X-Band Dielectric-Loaded Accelerating Structures by Chunguang Jing, Wei Gai, Power, John G, Konecny, Richard, Wanming Liu, Gold, Steven H, Kinkead, Allen K, Tantawi, Sami G, Dolgashev, Valery, Kanareykin, Alexei

“…We summarize recent progress in a program to develop externally powered dielectric-loaded accelerating (DLA) structures that can sustain high accelerating…”
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High power tests of normal conducting single-cell structures by Dolgashev, V.A., Tantawi, S.G., Nantista, C., Higashi, Y., Higo, T.

“…We report the results of the first high power tests of single-cell traveling-wave and standing-wave structures. These tests are part of an experimental and…”
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Superconducting materials testing with a high-Q copper RF cavity by Tantawi, S.G., Dolgashev, V., Bowden, G., Lewandowski, J., Nantista, C., Canabal, A., Tajima, T., Campisi, I.E.

“…Superconducting RF is of increasing importance in particle accelerators. We have developed a resonant cavity with high quality factor and an interchangeable…”
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Active high-power RF pulse compression using optically switched resonant delay lines by Tantawi, S.G., Ruth, R.D., Vlieks, A.E., Zolotorev, M.

“…We present the design and a proof of principle experimental results of an optically controlled high-power RP pulse-compression system. In principle, the design…”
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The generation of 400-MW RF pulses at X-band using resonant delay lines by Tantawi, S.G., Loewen, R.J., Nantista, C.D., Vlieks, A.E.

“…In this paper, we present theory and experimental data for a resonant-delay-line pulse-compression system. The system is fed by two high-power klystrons at…”
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X-band accelerator structures: On going R&D at the INFN by Gatti, G., Marcelli, A., Spataro, B., Dolgashev, V., Lewandowski, J., Tantawi, S.G., Yeremian, A.D., Higashi, Y., Rosenzweig, J., Sarti, S., Caliendo, C., Castorina, G., Cibin, G., Carfora, L., Leonardi, O., Rigato, V., Campostrini, M.

“…The next generation of accelerators, from the compact to the large infrastructure dedicated to high energy physics, is highly demanding in terms of…”
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A compact, planar, eight-port waveguide power divider/combiner: the cross potent superhybrid by Nantista, C.D., Tantawi, S.G.

“…We present a novel four-way divider/combiner in rectangular waveguide. The design is completely two-dimensional (2-D) in the h-plane, with eight-fold mirror…”
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The development of a diamond switch for RF pulse compression systems by Xiaoxi Xu, Schein, J., Niansheng Qi, Prasad, R.R., Krishnan, M., Fumihiko, T., Tantawi, S.G.

“…The use of a diamond RF switch for super-highpower microwave/millimeter wave generation has been evaluated. An X-band chemical vapor deposition (CVD) diamond…”
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VELOCIRAPTOR: An X-band photoinjector and linear accelerator for the production of Mono-Energetic γ - rays by Anderson, S.G., Albert, F., Bayramian, A.J., Beer, G., Bonanno, R.E., Cross, R.R., Deis, G., Ebbers, C.A., Gibson, D.J., Hartemann, F.V., Houck, T.L., Marsh, R.A., McNabb, D.P., Messerly, M.J., Scarpetti, R.D., Shverdin, M.Y., Siders, C.W., Wu, S.S., Barty, C.P.J., Adolphsen, C.E., Chu, T.S., Jongewaard, E.N., Li, Z., Limborg, C., Tantawi, S.G., Vlieks, A.E., Wang, F., Wang, J.W., Zhou, F., Raubenheimer, T.O.

“…The rf photoinjector and linear accelerator in the Mono-Energetic Gamma-ray (MEGa-ray) facility at LLNL is presented. This machine uses 11.4 GHz rf technology…”
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VELOCIRAPTOR: An X-band photoinjector and linear accelerator for the production of Mono-Energetic [gamma]-rays by Anderson, S G, Albert, F, Bayramian, A J, Beer, G, Bonanno, R E, Cross, R R, Deis, G, Ebbers, CA, Gibson, D J, Hartemann, F V, Houck, T L, Marsh, R A, McNabb, D P, Messerly, MJ, Scarpetti, R D, Shverdin, MY, Siders, C W, Wu, S S, Barty, CPJ, Adolphsen, CE, Chu, T S, Jongewaard, EN, Li, Z, Limborg, C, Tantawi, S G, Vlieks, A E, Wang, F, Wang, J W, Zhou, F, Raubenheimer, TO

“…The rf photoinjector and linear accelerator in the Mono-Energetic Gamma-ray (MEGa-ray) facility at LLNL is presented. This machine uses 11.4 GHz rf technology…”
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Interpretation of multifrequency complex resistivity data for a layered Earth model by Mahmoud, S.F., Tantawi, S.G., Wait, J.R.

“…A method is proposed for interpreting data obtained by measuring mutual impedances of dipole-dipole configurations on the surface of a layered Earth. Such data…”
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Mode selective directional coupler for NLC by Tantawi, S.G.

“…The design method for a high power, X-band 50 dB, circular to rectangular directional coupler is presented. The circular guide is over moded and is intended to…”
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RF Breakdown in Normal Conducting Single-Cell Structures by Dolgashev, V.A., Tantawi, S.G., Nantista, C.D., Higashi, Y., Higo, T.

“…Operating accelerating gradient in normal conducting accelerating structures is often limited by rf breakdown. The limit depends on multiple parameters,…”
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