Search Results - "Nantista, C."

Advances in Superconducting RF Technology for the ILC by Yamamoto, A., Adolphsen, C., Carwardine, J., Fukuda, S., Geng, R., Ginsburg, C., Harms, E., Hayano, H., Kako, E., Kerby, J., Lilje, L., Nantista, C., Ohuchi, N., Peterson, T., Pierini, P., Ross, M., Shidara, T., Walker, N.

“…Superconducting radio frequency (RF) is an enabling technology for the International Linear Collider (ILC); the ILC Global Design Effort has led R&D programs…”
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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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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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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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Experimental study of rf pulsed heating by Laurent, Lisa, Tantawi, Sami, Dolgashev, Valery, Nantista, Christopher, Higashi, Yasuo, Aicheler, Markus, Heikkinen, Samuli, Wuensch, Walter

“…Cyclic thermal stresses produced by rf pulsed heating can be the limiting factor on the attainable reliable gradients for room temperature linear accelerators…”
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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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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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High power tests of a multimode X-band rf distribution system by Tantawi, S., Nantista, C.

“…We present a multimode X-band rf pulse compression system suitable for the Next Linear Collider (NLC). The NLC main linacs operate at 11.424 GHz. A single NLC…”
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Low-field accelerator structure couplers and design techniques by Nantista, Christopher, Tantawi, Sami, Dolgashev, Valery

“…Recent experience with X-band accelerator structure development has shown the rf input coupler to be the region most prone to rf breakdown and degradation,…”
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RF Distribution optimization in the main linacs of the ILC by Bane, K.L.F., Adolphsen, C., Nantista, C.

“…The nominal design gradient in the main linacs of the International Linear Collider (ILC) is 31.5 MV/m for a beam current of 9.0 mA. However, the…”
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MgB@@d2@ for Application to RF Cavities for Accelerators by Tajima, T, Canabal, A, Zhao, Yue, Romanenko, A, Moeckly, B H, Nantista, C D, Tantawi, S, Phillips, L, Iwashita, Y, Campisi, I E

“…Magnesium diboride (MgB@@d2@) has a transition temperature of (T@@dc@) approx. 40 K, i.e., about 4 times as high as that of niobium (Nb). We have been…”
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MgB sub(2) for Application to RF Cavities for Accelerators by Tajima, T, Canabal, A, Zhao, Yue, Romanenko, A, Moeckly, B H, Nantista, C D, Tantawi, S, Phillips, L, Iwashita, Y, Campisi, I E

“…Magnesium diboride (MgB sub(2)) has a transition temperature of (T sub(c)) ~40 K, i.e., about 4 times as high as that of niobium (Nb). We have been evaluating…”
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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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Test Bed for Superconducting Materials by Nantista, C., Tantawi, S., Weisend, J., Siemann, R., Dolgashev, V., Campisi, I.

“…Superconducting rf cavities are increasingly used in accelerators. Gradient is a parameter of particular importance for the ILC. Much progress in gradient has…”
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An RF waveguide distribution system for the ILC test accelerator at Fermilab's NML by Nantista, C., Adolphsen, C., Bowden, G., Swent, R., McKee, B.

“…An ILC R&D facility is being constructed in the NML building at Fermilab which, in addition to an injector and beam dump with spectrometer, will contain up to…”
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High Gradient Performance of NLC/GLC X-Band Accelerating Structures by Dobert, S., Adolphsen, C., Bowden, G., Burke, D., Chan, J., Dolgashev, V., Frisch, J., Jobe, K., Jones, R., Lewandowski, J., Kirby, R., Li, Z., McCormick, D., Miller, R., Nantista, C., Nelson, J., Pearson, C., Ross, M., Schultz, D., Smith, T., Tantawi, S., Wang, J., Arkan, T., Boffo, C., Carter, H., Gonin, I., Khabiboulline, T., Mishra, S., Romanov, G., Solyak, N., Funahashi, Y., Hayano, H., Higashi, N., Higashi, Y., Higo, T., Kawamata, H., Kume, T., Morozumi, Y., Takata, K., Takatomi, T., Toge, N., Ueno, K., Watanabe, Y.

“…During the past five years, there has been an concerted program at SLAC and KEK to develop accelerator structures that meet the high gradient (65 MV/m)…”
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High-power RF pulse compression with SLED-II at SLAC by Hantista, C., Farkas, Z.D., Kroll, N.M., Lavine, T.L., Menegat, A., Ruth, R.D., Tantawi, S.G., Vlieks, A.E., Wilson, P.B.

“…Increasing the peak RF power available from X-band microwave tubes by means of RF pulse compression is envisioned as a way of achieving the…”
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High-power coupler component test stand status and results by Rusnak, B., Wang, F., Adolphsen, C., Bowden, G., Nantista, C., Swent, R., Tice, J., McKee, B., Jobe, K., Li, Z., Ge, L.

“…Fundamental power couplers for superconducting accelerator applications like the ILC are complicated transmission line assemblies that must simultaneously…”
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Development of a dielectric-loaded test accelerator by Gold, S.H., Kinkead, A.K., Gai, W., Power, J.G., Konecny, R., Long, J., Jing, C., Tantawi, S.G., Nantista, C.D.

“…This paper presents a progress report on a joint project by the Naval Research Laboratory (NRL) and Argonne National Laboratory (ANL), in collaboration with…”
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Untrapped HOM Radiation Absorption in the LCLS-II Cryomodules by Bane, K, Nantista, C, Adolphsen, C, Raubenheimer, T, Saini, A, Solyak, N, Yakovlev, V

“…The superconducting cavities in the continuous wave (CW) linacs of LCLS-II are designed to operate at 2 K, where cooling costs are very expensive. One source…”
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