Search Results - "Calaga, R."

Luminosity reduction caused by phase modulations at the HL-LHC crab cavities by Yamakawa, E., Apsimon, R., Baudrenghien, P., Calaga, R., Dexter, A.C.

“…The design of the High-Luminosity Large Hadron Collider (HL-LHC) requires two pairs of crab cavities to be installed either side of Interaction Points (IPs) 1…”
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Impact of beam coupling impedance on crab cavity noise induced emittance growth by Triantafyllou, N., Antoniou, F., Bartosik, H., Baudrenghien, P., Buffat, X., Calaga, R., Papaphilippou, Y., Mastoridis, T., Wolski, A.

“…Crab cavities will be deployed as a part of the High Luminosity Large Hadron Collider (HL-LHC) upgrade to mitigate the luminosity reduction induced by the…”
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Record low β beating in the LHC by Tomás, R., Bach, T., Calaga, R., Langner, A., Levinsen, Y. I., Maclean, E. H., Persson, T. H. B., Skowronski, P. K., Strzelczyk, M., Vanbavinckhove, G., Miyamoto, R.

“…The LHC is currently operating with a proton energy of 4 TeVand beta* functions at the ATLAS and CMS interaction points of 0.6 m. This is close to the design…”
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The European Spallation Source by Lindroos, M., Bousson, S., Calaga, R., Danared, H., Devanz, G., Duperrier, R., Eguia, J., Eshraqi, M., Gammino, S., Hahn, H., Jansson, A., Oyon, C., Pape-Møller, S., Peggs, S., Ponton, A., Rathsman, K., Ruber, R., Satogata, T., Trahern, G.

“…In 2003 the joint European effort to design a European Spallation Source (ESS) resulted in a set of reports, and in May 2009 Lund was agreed to be the ESS…”
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HOM identification by bead pulling in the Brookhaven ERL cavity by Hahn, H., Calaga, R., Jain, Puneet, Johnson, Elliott C., Xu, Wencan

“…Exploratory measurements of the Brookhaven Energy Recovery Linac (ERL) cavity at superconducting temperature produced a long list of high order modes (HOMs)…”
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CERN Large Hadron Collider optics model, measurements, and corrections by Tomás, R., Brüning, O., Giovannozzi, M., Hagen, P., Lamont, M., Schmidt, F., Vanbavinckhove, G., Aiba, M., Calaga, R., Miyamoto, R.

“…Optics stability during all phases of operation is crucial for the LHC. Tools and procedures have been developed for rapid checks of beta beating, dispersion,…”
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First demonstration of the use of crab cavities on hadron beams by Calaga, R., Alekou, A., Antoniou, F., Appleby, R. B., Arnaudon, L., Artoos, K., Arduini, G., Baglin, V., Barriere, S., Bartosik, H., Baudrenghien, P., Ben-Zvi, I., Bohl, T., Boucherie, A., Brüning, O. S., Brodzinski, K., Butterworth, A., Burt, G., Capatina, O., Calvo, S., Capelli, T., Carlà, M., Carra, F., Carver, L. R., Castilla-Loeza, A., Daly, E., Dassa, L., Delayen, J., De Silva, S. U., Dexter, A., Garlasche, M., Gerigk, F., Giordanino, L., Glenat, D., Guinchard, M., Harrison, A., Jensen, E., Julie, C., Jones, T., Killing, F., Krawczyk, A., Levens, T., Leuxe, R., Lindstrom, B., Li, Z., MacEwen, A., Macpherson, A., Menendez, P., Mikkola, T., Minginette, P., Mitchell, J., Montesinos, E., Papotti, G., Park, H., Pasquino, C., Pattalwar, S., Pleite, E. C., Powers, T., Prochal, B., Ratti, A., Rossi, L., Rude, V., Therasse, M., Tomás, R., Stapley, N., Santillana, I., Shipman, N., Simonin, J., Sosin, M., Swieszek, J., Templeton, N., Vandoni, G., Verdú-Andrés, S., Wartak, M., Welsch, C., Wollman, D., Wu, Q., Xiao, B., Yamakawa, E., Zanoni, C., Zimmermann, F., Zwozniak, A.

“…Many future particle colliders require beam crabbing to recover geometric luminosity loss from the nonzero crossing angle at the interaction point (IP). A…”
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Long-range beam-beam experiments in the Relativistic Heavy Ion Collider by Calaga, R., Fischer, W., Robert-Demolaize, G., Milas, N.

“…Long-range beam-beam effects are a potential limit to the LHC performance with the nominal design parameters, and certain upgrade scenarios under discussion…”
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Design and vertical tests of double-quarter wave cavity prototypes for the high-luminosity LHC crab cavity system by Verdú-Andrés, S., Artoos, K., Belomestnykh, S., Ben-Zvi, I., Boulware, C., Burt, G., Calaga, R., Capatina, O., Carra, F., Castilla, A., Clemens, W., Grimm, T., Kuder, N., Leuxe, R., Li, Z., McEwen, E. A., Park, H., Powers, T., Ratti, A., Shipman, N., Skaritka, J., Wu, Q., Xiao, B. P., Yancey, J., Zanoni, C.

“…Crab crossing is essential for high-luminosity colliders. The high-luminosity Large Hadron Collider (HL-LHC) will equip one of its interaction points (IP1)…”
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Design and testing of a four rod crab cavity for High Luminosity LHC by Hall, B., Burt, G., Apsimon, R., Lingwood, C. J., Tutte, A., Grudiev, A., Macpherson, A., Navarro-Tapia, M., Calaga, R., Hernández-Chahín, K. G., Appleby, R. B., Goudket, P.

“…A 4-rod deflecting structure is proposed as a possible crab cavity design for the LHC high luminosity upgrade. Crab cavities are required for the LHC…”
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Response of colliding beam-beam system to harmonic excitation due to crab-cavity rf phase modulation by Ohmi, K., Tomás, R., Funakoshi, Y., Calaga, R., Ieiri, T., Morita, Y., Nakanishi, K., Oide, K., Ohnishi, Y., Sun, Y., Tobiyama, M., Zimmermann, F.

“…During 2008 and 2009 dedicated beam experiments with crab cavities were performed in the KEKB. The goal was to measure the impact of crab-cavity radio…”
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First β -beating measurement and optics analysis for the CERN Large Hadron Collider by Aiba, M., Fartoukh, S., Franchi, A., Giovannozzi, M., Kain, V., Lamont, M., Tomás, R., Vanbavinckhove, G., Wenninger, J., Zimmermann, F., Calaga, R., Morita, A.

“…Proton beams were successfully steered through the entire ring of the CERN Large Hadron Collider (LHC) on September the 10th of 2008. A reasonable lifetime was…”
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Statistical analysis of RHIC beam position monitors performance by Calaga, R., Tomás, R.

“…A detailed statistical analysis of beam position monitors (BPM) performance at RHIC is a critical factor in improving regular operations and future runs…”
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Dependence of the electron-cloud instability on the beam energy by Rumolo, G, Arduini, G, Métral, E, Shaposhnikova, E, Benedetto, E, Calaga, R, Papotti, G, Salvant, B

“…The electron cloud (EC) can be formed in the beam pipe of a circular accelerator if the secondary emission yield (SEY) of the inner surface is larger than 1,…”
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Betatron coupling: Merging Hamiltonian and matrix approaches by Calaga, R., Tomás, R., Franchi, A.

“…Betatron coupling is usually analyzed using either matrix formalism or Hamiltonian perturbation theory. The latter is less exact but provides a better physical…”
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Measurement of global and local resonance terms by Tomás, R., Bai, M., Calaga, R., Fischer, W., Franchi, A., Rumolo, G.

“…Recently, resonance driving terms were successfully measured in the CERN SPS and the BNL RHIC from the Fourier spectrum of beam position monitor (BPM) data…”
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Higher-order-mode absorbers for energy recovery linac cryomodules at Brookhaven National Laboratory by Hahn, H., Ben-Zvi, I., Calaga, R., Hammons, L., Johnson, E. C., Kewisch, J., Litvinenko, V. N., Xu, Wencan

“…Several future accelerator projects at Brookhaven for the Relativistic Heavy Ion Collider (RHIC) are based on energy recovery linacs (ERLs) with high-charge…”
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Beam dynamics aspects of crab cavities in the CERN Large Hadron Collider by Sun, Yi-Peng, Assmann, Ralph, Barranco, Javier, Tomás, Rogelio, Weiler, Thomas, Zimmermann, Frank, Calaga, Rama, Morita, Akio

“…Modern colliders bring into collision a large number of bunches to achieve a high luminosity. The long-range beam-beam effects arising from parasitic…”
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High current superconducting gun at 703.75 MHz by Calaga, R., Ben-Zvi, I., Blaskiewicz, M., Chang, X., Kayran, D., Litvinenko, V.

“…A half-cell superconducting RF (SRF) electron gun has been proposed as an injector to the 20 MeV energy recovery linac (ERL) prototype at Brookhaven National…”
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R-square impedance of ERL ferrite HOM absorber by Hahn, H., Burrill, A., Calaga, R., Kayran, D., Zhao, Y.

“…An R&D facility for an energy recovery linac (ERL) intended as part of an electron-cooling project for RHIC is being constructed at this laboratory. The center…”
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