P. Bambade - Orsay and KEK, Tsukuba

P. Bambade
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Name
P. Bambade
Affiliation
Orsay and KEK, Tsukuba
City
Tsukuba
Country
Japan

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Physics - Accelerator Physics (19)
 
High Energy Physics - Phenomenology (6)
 
High Energy Physics - Experiment (5)
 
Physics - Instrumentation and Detectors (5)

Publications Authored By P. Bambade

Halo distribution is a key topic for background study. This paper has developed an analytical method to give an estimation of ATF beam halo distribution. The equilibrium particle distribution of the beam tail in the ATF damping ring is calculated analytically with different emittance and different vacuum degree. Read More

2016Aug
Authors: The CLIC, CLICdp collaborations, :, M. J. Boland, U. Felzmann, P. J. Giansiracusa, T. G. Lucas, R. P. Rassool, C. Balazs, T. K. Charles, K. Afanaciev, I. Emeliantchik, A. Ignatenko, V. Makarenko, N. Shumeiko, A. Patapenka, I. Zhuk, A. C. Abusleme Hoffman, M. A. Diaz Gutierrez, M. Vogel Gonzalez, Y. Chi, X. He, G. Pei, S. Pei, G. Shu, X. Wang, J. Zhang, F. Zhao, Z. Zhou, H. Chen, Y. Gao, W. Huang, Y. P. Kuang, B. Li, Y. Li, J. Shao, J. Shi, C. Tang, X. Wu, L. Ma, Y. Han, W. Fang, Q. Gu, D. Huang, X. Huang, J. Tan, Z. Wang, Z. Zhao, T. Laštovička, U. Uggerhoj, T. N. Wistisen, A. Aabloo, K. Eimre, K. Kuppart, S. Vigonski, V. Zadin, M. Aicheler, E. Baibuz, E. Brücken, F. Djurabekova, P. Eerola, F. Garcia, E. Haeggström, K. Huitu, V. Jansson, V. Karimaki, I. Kassamakov, A. Kyritsakis, S. Lehti, A. Meriläinen, R. Montonen, T. Niinikoski, K. Nordlund, K. Österberg, M. Parekh, N. A. Törnqvist, J. Väinölä, M. Veske, W. Farabolini, A. Mollard, O. Napoly, F. Peauger, J. Plouin, P. Bambade, I. Chaikovska, R. Chehab, M. Davier, W. Kaabi, E. Kou, F. LeDiberder, R. Pöschl, D. Zerwas, B. Aimard, G. Balik, J. -P. Baud, J. -J. Blaising, L. Brunetti, M. Chefdeville, C. Drancourt, N. Geoffroy, J. Jacquemier, A. Jeremie, Y. Karyotakis, J. M. Nappa, S. Vilalte, G. Vouters, A. Bernard, I. Peric, M. Gabriel, F. Simon, M. Szalay, N. van der Kolk, T. Alexopoulos, E. N. Gazis, N. Gazis, E. Ikarios, V. Kostopoulos, S. Kourkoulis, P. D. Gupta, P. Shrivastava, H. Arfaei, M. K. Dayyani, H. Ghasem, S. S. Hajari, H. Shaker, Y. Ashkenazy, H. Abramowicz, Y. Benhammou, O. Borysov, S. Kananov, A. Levy, I. Levy, O. Rosenblat, G. D'Auria, S. Di Mitri, T. Abe, A. Aryshev, T. Higo, Y. Makida, S. Matsumoto, T. Shidara, T. Takatomi, Y. Takubo, T. Tauchi, N. Toge, K. Ueno, J. Urakawa, A. Yamamoto, M. Yamanaka, R. Raboanary, R. Hart, H. van der Graaf, G. Eigen, J. Zalieckas, E. Adli, R. Lillestøl, L. Malina, J. Pfingstner, K. N. Sjobak, W. Ahmed, M. I. Asghar, H. Hoorani, S. Bugiel, R. Dasgupta, M. Firlej, T. A. Fiutowski, M. Idzik, M. Kopec, M. Kuczynska, J. Moron, K. P. Swientek, W. Daniluk, B. Krupa, M. Kucharczyk, T. Lesiak, A. Moszczynski, B. Pawlik, P. Sopicki, T. Wojtoń, L. Zawiejski, J. Kalinowski, M. Krawczyk, A. F. Żarnecki, E. Firu, V. Ghenescu, A. T. Neagu, T. Preda, I-S. Zgura, A. Aloev, N. Azaryan, J. Budagov, M. Chizhov, M. Filippova, V. Glagolev, A. Gongadze, S. Grigoryan, D. Gudkov, V. Karjavine, M. Lyablin, A. Olyunin, A. Samochkine, A. Sapronov, G. Shirkov, V. Soldatov, A. Solodko, E. Solodko, G. Trubnikov, I. Tyapkin, V. Uzhinsky, A. Vorozhtov, E. Levichev, N. Mezentsev, P. Piminov, D. Shatilov, P. Vobly, K. Zolotarev, I. Bozovic Jelisavcic, G. Kacarevic, S. Lukic, G. Milutinovic-Dumbelovic, M. Pandurovic, U. Iriso, F. Perez, M. Pont, J. Trenado, M. Aguilar-Benitez, J. Calero, L. Garcia-Tabares, D. Gavela, J. L. Gutierrez, D. Lopez, F. Toral, D. Moya, A. Ruiz Jimeno, I. Vila, T. Argyropoulos, C. Blanch Gutierrez, M. Boronat, D. Esperante, A. Faus-Golfe, J. Fuster, N. Fuster Martinez, N. Galindo Muñoz, I. García, J. Giner Navarro, E. Ros, M. Vos, R. Brenner, T. Ekelöf, M. Jacewicz, J. Ögren, M. Olvegård, R. Ruber, V. Ziemann, D. Aguglia, N. Alipour Tehrani, A. Andersson, F. Andrianala, F. Antoniou, K. Artoos, S. Atieh, R. Ballabriga Sune, M. J. Barnes, J. Barranco Garcia, H. Bartosik, C. Belver-Aguilar, A. Benot Morell, D. R. Bett, S. Bettoni, G. Blanchot, O. Blanco Garcia, X. A. Bonnin, O. Brunner, H. Burkhardt, S. Calatroni, M. Campbell, N. Catalan Lasheras, M. Cerqueira Bastos, A. Cherif, E. Chevallay, B. Constance, R. Corsini, B. Cure, S. Curt, B. Dalena, D. Dannheim, G. De Michele, L. De Oliveira, N. Deelen, J. P. Delahaye, T. Dobers, S. Doebert, M. Draper, F. Duarte Ramos, A. Dubrovskiy, K. Elsener, J. Esberg, M. Esposito, V. Fedosseev, P. Ferracin, A. Fiergolski, K. Foraz, A. Fowler, F. Friebel, J-F. Fuchs, C. A. Fuentes Rojas, A. Gaddi, L. Garcia Fajardo, H. Garcia Morales, C. Garion, L. Gatignon, J-C. Gayde, H. Gerwig, A. N. Goldblatt, C. Grefe, A. Grudiev, F. G. Guillot-Vignot, M. L. Gutt-Mostowy, M. Hauschild, C. Hessler, J. K. Holma, E. Holzer, M. Hourican, D. Hynds, Y. Inntjore Levinsen, B. Jeanneret, E. Jensen, M. Jonker, M. Kastriotou, J. M. K. Kemppinen, R. B. Kieffer, W. Klempt, O. Kononenko, A. Korsback, E. Koukovini Platia, J. W. Kovermann, C-I. Kozsar, I. Kremastiotis, S. Kulis, A. Latina, F. Leaux, P. Lebrun, T. Lefevre, L. Linssen, X. Llopart Cudie, A. A. Maier, H. Mainaud Durand, E. Manosperti, C. Marelli, E. Marin Lacoma, R. Martin, S. Mazzoni, G. Mcmonagle, O. Mete, L. M. Mether, M. Modena, R. M. Münker, T. Muranaka, E. Nebot Del Busto, N. Nikiforou, D. Nisbet, J-M. Nonglaton, F. X. Nuiry, A. Nürnberg, M. Olvegard, J. Osborne, S. Papadopoulou, Y. Papaphilippou, A. Passarelli, M. Patecki, L. Pazdera, D. Pellegrini, K. Pepitone, E. Perez Codina, A. Perez Fontenla, T. H. B. Persson, M. Petrič, F. Pitters, S. Pittet, F. Plassard, R. Rajamak, S. Redford, Y. Renier, S. F. Rey, G. Riddone, L. Rinolfi, E. Rodriguez Castro, P. Roloff, C. Rossi, V. Rude, G. Rumolo, A. Sailer, E. Santin, D. Schlatter, H. Schmickler, D. Schulte, N. Shipman, E. Sicking, R. Simoniello, P. K. Skowronski, P. Sobrino Mompean, L. Soby, M. P. Sosin, S. Sroka, S. Stapnes, G. Sterbini, R. Ström, I. Syratchev, F. Tecker, P. A. Thonet, L. Timeo, H. Timko, R. Tomas Garcia, P. Valerio, A. L. Vamvakas, A. Vivoli, M. A. Weber, R. Wegner, M. Wendt, B. Woolley, W. Wuensch, J. Uythoven, H. Zha, P. Zisopoulos, M. Benoit, M. Vicente Barreto Pinto, M. Bopp, H. H. Braun, M. Csatari Divall, M. Dehler, T. Garvey, J. Y. Raguin, L. Rivkin, R. Zennaro, A. Aksoy, Z. Nergiz, E. Pilicer, I. Tapan, O. Yavas, V. Baturin, R. Kholodov, S. Lebedynskyi, V. Miroshnichenko, S. Mordyk, I. Profatilova, V. Storizhko, N. Watson, A. Winter, J. Goldstein, S. Green, J. S. Marshall, M. A. Thomson, B. Xu, W. A. Gillespie, R. Pan, M. A Tyrk, D. Protopopescu, A. Robson, R. Apsimon, I. Bailey, G. Burt, D. Constable, A. Dexter, S. Karimian, C. Lingwood, M. D. Buckland, G. Casse, J. Vossebeld, A. Bosco, P. Karataev, K. Kruchinin, K. Lekomtsev, L. Nevay, J. Snuverink, E. Yamakawa, V. Boisvert, S. Boogert, G. Boorman, S. Gibson, A. Lyapin, W. Shields, P. Teixeira-Dias, S. West, R. Jones, N. Joshi, R. Bodenstein, P. N. Burrows, G. B. Christian, D. Gamba, C. Perry, J. Roberts, J. A. Clarke, N. A. Collomb, S. P. Jamison, B. J. A. Shepherd, D. Walsh, M. Demarteau, J. Repond, H. Weerts, L. Xia, J. D. Wells, C. Adolphsen, T. Barklow, M. Breidenbach, N. Graf, J. Hewett, T. Markiewicz, D. McCormick, K. Moffeit, Y. Nosochkov, M. Oriunno, N. Phinney, T. Rizzo, S. Tantawi, F. Wang, J. Wang, G. White, M. Woodley

The Compact Linear Collider (CLIC) is a multi-TeV high-luminosity linear e+e- collider under development. For an optimal exploitation of its physics potential, CLIC is foreseen to be built and operated in a staged approach with three centre-of-mass energy stages ranging from a few hundred GeV up to 3 TeV. The first stage will focus on precision Standard Model physics, in particular Higgs and top-quark measurements. Read More

The investigation of beam halo transverse distributions is important for the understanding of beam losses and the control of backgrounds in Future Linear Colliders (FLC). A novel in vacuum diamond sensor (DSv) scanner with four strips has been designed and developed for the investigation of the beam halo transverse distributions and also for the diagnostics of Compton recoil electrons after the interaction point (IP) of ATF2, a low energy (1.3 GeV) prototype of the final focus system for the ILC and CLIC linear collider projects. Read More

The Oide effect considers the synchrotron radiation in the final focusing quadrupole and it sets a lower limit on the vertical beam size at the Interaction Point, particularly relevant for high energy linear colliders. The theory of the Oide effect was derived considering only the radiation in the focusing plane of the magnet. This article addresses the theoretical calculation of the radiation effect on the beam size consider- ing both focusing and defocusing planes of the quadrupole, refered to as 2D-Oide. Read More

The requirements on the Final Focusing System (FFS) for a new linear collider has lead to lattice designs where chromaticity is corrected either locally or non-locally. Here, we present the status of an alternative lattice design developed for the current CLIC 500GeV beam parameters where chromaticity is corrected upstream the Final Doublet (FD) and the geometrical components in the vertical plane are corrected locally. The diagnose of this design showed to possible variations two the lattice : the second order dispersion and its derivative with respect to $s$ must be cancelled before the FD, or some dispersion must be tolerated at the sextupole located inside the FD. Read More

Two special calorimeters are foreseen for the instrumentation of the very forward region of an ILC or CLIC detector; a luminometer (LumiCal) designed to measure the rate of low angle Bhabha scattering events with a precision better than 10$^{-3}$ at the ILC and 10$^{-2}$ at CLIC, and a low polar-angle calorimeter (BeamCal). The latter will be hit by a large amount of beamstrahlung remnants. The intensity and the spatial shape of these depositions will provide a fast luminosity estimate, as well as determination of beam parameters. Read More

The role of the ILC final focus system (FFS) is to demagnify the beam to the sizes at the IP required to meet the ILC luminosity goals. The current design of final focus performs perfect chromaticity correction in both horizontal and vertical planes. Based on this design a set of alternative optical configurations were studied in which the horizontal beam size at the IP is increased while at the same time the vertical one is decreased, with the goal of reducing beamsstrahlung emission. Read More

In order to study the background status in the ATF2 beam line and the interaction point (IP), this paper developed an analytical method to give the estimation of ATF beam halo distribution based on K. Hirata and K. Yokoya's theory. Read More

2013Jun
Authors: SuperB Collaboration, M. Baszczyk, P. Dorosz, J. Kolodziej, W. Kucewicz, M. Sapor, A. Jeremie, E. Grauges Pous, G. E. Bruno, G. De Robertis, D. Diacono, G. Donvito, P. Fusco, F. Gargano, F. Giordano, F. Loddo, F. Loparco, G. P. Maggi, V. Manzari, M. N. Mazziotta, E. Nappi, A. Palano, B. Santeramo, I. Sgura, L. Silvestris, V. Spinoso, G. Eigen, J. Zalieckas, Z. Zhuo, L. Jenkovszky, G. Balbi, M. Boldini, D. Bonacorsi, V. Cafaro, I. D'Antone, G. M. Dallavalle, R. Di Sipio, F. Fabbri, L. Fabbri, A. Gabrielli, D. Galli, P. Giacomelli, V. Giordano, F. M. Giorgi, C. Grandi, I. Lax, S. Lo Meo, U. Marconi, A. Montanari, G. Pellegrini, M. Piccinini, T. Rovelli, N. Semprini Cesari, G. Torromeo, N. Tosi, R. Travaglini, V. M. Vagnoni, S. Valentinetti, M. Villa, A. Zoccoli, J. -F. Caron, C. Hearty, P. F. -T. Lu, T. S. Mattison, J. A. McKenna, R. Y. -C. So, M. Yu. Barnyakov, V. E. Blinov, A. A. Botov, V. P. Druzhinin, V. B. Golubev, S. A. Kononov, E. A. Kravchenko, E. B. Levichev, A. P. Onuchin, S. I. Serednyakov, D. A. Shtol, Y. I. Skovpen, E. P. Solodov, A. Cardini, M. Carpinelli, D. S. -T. Chao, C. H. Cheng, D. A. Doll, B. Echenard, K. Flood, J. Hanson, D. G. Hitlin, P. Ongmongkolkul, F. C. Porter, R. Y. Zhu, N. Randazzo, E. De La Cruz Burelo, Y. Zheng, P. Campos, M. De Silva, A. Kathirgamaraju, B. Meadows, B. Pushpawela, Y. Shi, M. Sokoloff, G. Lopez Castro, V. Ciaschini, P. Franchini, F. Giacomini, A. Paolini, G. A. Calderon Polania, S. Laczek, P. Romanowicz, B. Szybinski, M. Czuchry, L. Flis, D. Harezlak, J. Kocot, M. Radecki, M. Sterzel, T. Szepieniec, T. Szymocha, P. Wójcik, M. Andreotti, W. Baldini, R. Calabrese, V. Carassiti, G. Cibinetto, A. Cotta Ramusino, F. Evangelisti, A. Gianoli, E. Luppi, R. Malaguti, M. Manzali, M. Melchiorri, M. Munerato, C. Padoan, V. Santoro, L. Tomassetti, M. M. Beretta, M. Biagini, M. Boscolo, E. Capitolo, R. de Sangro, M. Esposito, G. Felici, G. Finocchiaro, M. Gatta, C. Gatti, S. Guiducci, S. Lauciani, P. Patteri, I. Peruzzi, M. Piccolo, P. Raimondi, M. Rama, C. Sanelli, S. Tomassini, P. Fabbricatore, D. Delepine, M. A. Reyes Santos, M. Chrzaszcz, R. Grzymkowski, P. Knap, J. Kotula, T. Lesiak, J. Ludwin, J. Michalowski, B. Pawlik, B. Rachwal, M. Stodulski, J. Wiechczynski, M. Witek, L. Zawiejski, M. Zdybal, V. Y. Aushev, A. Ustynov, N. Arnaud, P. Bambade, C. Beigbeder, F. Bogard, M. Borsato, D. Breton, J. Brossard, L. Burmistrov, D. Charlet, V. Chaumat, O. Dadoun, M. El Berni, J. Maalmi, V. Puill, C. Rimbault, A. Stocchi, V. Tocut, A. Variola, S. Wallon, G. Wormser, F. Grancagnolo, E. Ben-Haim, S. Sitt, M. Baylac, O. Bourrion, J. -M. Deconto, Y. Gomez Martinez, N. Monseu, J. -F. Muraz, J. -S. Real, C. Vescovi, R. Cenci, A. Jawahery, D. Roberts, E. W. Twedt, R. Cheaib, D. Lindemann, S. Nderitu, P. Patel, S. H. Robertson, D. Swersky, A. Warburton, E. Cuautle Flores, G. Toledo Sanchez, P. Biassoni, L. Bombelli, M. Citterio, S. Coelli, C. Fiorini, V. Liberali, M. Monti, B. Nasri, N. Neri, F. Palombo, F. Sabatini, A. Stabile, A. Berra, A. Giachero, C. Gotti, D. Lietti, M. Maino, G. Pessina, M. Prest, J. -P. Martin, M. Simard, N. Starinski, P. Taras, A. Drutskoy, S. Makarychev, A. V. Nefediev, A. Aloisio, S. Cavaliere, G. De Nardo, M. Della Pietra, A. Doria, R. Giordano, A. Ordine, S. Pardi, G. Russo, C. Sciacca, I. I. Bigi, C. P. Jessop, W. Wang, M. Bellato, M. Benettoni, M. Corvo, A. Crescente, F. Dal Corso, U. Dosselli, C. Fanin, A. Gianelle, S. Longo, M. Michelotto, F. Montecassiano, M. Morandin, R. Pengo, M. Posocco, M. Rotondo, G. Simi, R. Stroili, L. Gaioni, A. Manazza, M. Manghisoni, L. Ratti, V. Re, G. Traversi, S. Zucca, S. Bizzaglia, M. Bizzarri, C. Cecchi, S. Germani, M. Lebeau, P. Lubrano, E. Manoni, A. Papi, A. Rossi, G. Scolieri, G. Batignani, S. Bettarini, G. Casarosa, A. Cervelli, A. Fella, F. Forti, M. Giorgi, L. Lilli, A. Lusiani, B. Oberhof, A. Paladino, F. Pantaleo, E. Paoloni, A. L. Perez Perez, G. Rizzo, J. Walsh, A. Fernández Téllez, G. Beck, M. Berman, A. Bevan, F. Gannaway, G. Inguglia, A. J. Martin, J. Morris, V. Bocci, M. Capodiferro, G. Chiodi, I. Dafinei, N. V. Drenska, R. Faccini, F. Ferroni, C. Gargiulo, P. Gauzzi, C. Luci, R. Lunadei, G. Martellotti, F. Pellegrino, V. Pettinacci, D. Pinci, L. Recchia, D. Ruggeri, A. Zullo, P. Camarri, R. Cardarelli, C. De Santis, A. Di Ciaccio, V. Di Felice, F. Di Palma, A. Di Simone, L. Marcelli, R. Messi, D. Moricciani, R. Sparvoli, S. Tammaro, P. Branchini, A. Budano, S. Bussino, M. Ciuchini, F. Nguyen, A. Passeri, F. Ruggieri, E. Spiriti, F. Wilson, I. Leon Monzon, J. R. Millan-Almaraz, P. L. M. Podesta-Lerma, D. Aston, B. Dey, A. Fisher, P. D. Jackson, D. W. G. S. Leith, S. Luitz, D. MacFarlane, M. McCulloch, S. Metcalfe, A. Novokhatski, S. Osier, R. Prepost, B. Ratcliff, J. Seeman, M. Sullivan, J. Va'vra, U. Wienands, W. Wisniewski, B. D. Altschul, M. V. Purohit, J. Baudot, I. Ripp-Baudot, G. A. P. Cirrone, G. Cuttone, O. Bezshyyko, G. Dolinska, A. Soffer, F. Bianchi, F. De Mori, A. Filippi, D. Gamba, S. Marcello, M. Bomben, L. Bosisio, P. Cristaudo, L. Lanceri, B. Liberti, I. Rashevskaya, C. Stella, E. S. Vallazza, L. Vitale, G. Auriemma, C. Satriano, F. Martinez Vidal, J. Mazorra de Cos, A. Oyanguren, P. Ruiz Valls, A. Beaulieu, S. Dejong, J. Franta, M. J. Lewczuk, M. Roney, R. Sobie

In this Technical Design Report (TDR) we describe the SuperB detector that was to be installed on the SuperB e+e- high luminosity collider. The SuperB asymmetric collider, which was to be constructed on the Tor Vergata campus near the INFN Frascati National Laboratory, was designed to operate both at the Upsilon(4S) center-of-mass energy with a luminosity of 10^{36} cm^{-2}s^{-1} and at the tau/charm production threshold with a luminosity of 10^{35} cm^{-2}s^{-1}. This high luminosity, producing a data sample about a factor 100 larger than present B Factories, would allow investigation of new physics effects in rare decays, CP Violation and Lepton Flavour Violation. Read More

2012Jul
Affiliations: 1Orsay and KEK, Tsukuba, 2Valencia U., IFIC, 3SLAC, 4Daresbury, 5Oxford U., JAI, 6KEK, Tsukuba, 7KEK, Tsukuba, 8Beijing, Inst. High Energy Phys., 9SLAC, 10Oxford U., JAI, 11Royal Holloway, U. of London, 12Savoie U., 13Royal Holloway, U. of London, 14Royal Holloway, U. of London, 15Oxford U., JAI, 16Oxford U., JAI, 17Oxford U., JAI, 18Oxford U., JAI, 19CERN, 20Royal Holloway, U. of London, 21DESY, 22Valencia U., IFIC, 23KEK, Tsukuba, 24Beijing, Inst. High Energy Phys., 25Savoie U., 26Fermilab, 27Ecole Polytechnique, 28KEK, Tsukuba, 29Kyungpook Natl. U., 30KEK, Tsukuba, 31Pohang Accelerator Lab., 32Pohang Accelerator Lab., 33Kyoto U., Inst. Chem. Res., 34Savoie U., 35Daresbury, 36Tokyo U., 37Royal Holloway, U. of London, 38Kyungpook Natl. U., 39Kyungpook Natl. U., 40Pohang Accelerator Lab., 41Tokyo U., 42KEK, Tsukuba, 43KEK, Tsukuba, 44KEK, Tsukuba, 45SLAC, 46University Coll. London, 47KEK, Tsukuba, 48SLAC, 49Royal Holloway, U. of London, 50KEK, Tsukuba, 51Tokyo U., 52SLAC, 53Tohoku U., 54KEK, Tsukuba, 55Tokyo U., 56Pohang Accelerator Lab., 57Brookhaven, 58SLAC, 59Oxford U., JAI, 60SLAC, 61SLAC, 62Orsay and KEK, Tsukuba, 63Oxford U., JAI, 64Orsay, 65Fermilab, 66Tohoku U., 67Manchester U., 68CERN, 69SLAC, 70SLAC, 71Tokyo U., 72KEK, Tsukuba, 73Oxford U., JAI, 74Hiroshima U., 75KEK, Tsukuba, 76KEK, Tsukuba, 77CERN, 78KEK, Tsukuba, 79Oxford U., JAI, 80Ecole Polytechnique, 81SLAC, 82Oxford U., JAI, 83Fermilab, 84SLAC, 85SLAC, 86Liverpool U., 87SLAC, 88Tokyo U., 89Tokyo U., 90SLAC, 91Tokyo U., 92KEK, Tsukuba, 93SLAC, 94CERN

ATF2 is a final-focus test beam line which aims to focus the low emittance beam from the ATF damping ring to a vertical size of about 37 nm and to demonstrate nanometer level beam stability. Several advanced beam diagnostics and feedback tools are used. In December 2008, construction and installation were completed and beam commissioning started, supported by an international team of Asian, European, and U. Read More

Two special calorimeters are foreseen for the instrumentation of the very forward region of the ILC detector, a luminometer designed to measure the rate of low angle Bhabha scattering events with a precision better than 10-3 and a low polar angle calorimeter, adjacent to the beam-pipe. The latter will be hit by a large amount of beamstrahlung remnants. The amount and shape of these depositions will allow a fast luminosity estimate and the determination of beam parameters. Read More

More than twenty institutes join the FCAL Collaboration in study of design of the very forward region of a detector for ILC and CLIC. Of particular importance is an accurate luminosity measurement to the level of 10-3, a requirement driven by the potential for precision physics at a future linear collider. In this paper, the method for luminosity measurement, requirements on luminometer and its integration in the forward region are presented. Read More

The intense beam-beam effect at the interaction point of the International Linear Collider (ILC) causes large disruption of the beams and the production of photons. These photons, arising dominantly through beamstrahlung emission, are problematic for the machine design as they need to be transported and dumped in a controlled way. In this work, we perform simulations of the beam-beam interaction to predict photon production rates and distributions for the different beam parameters considered at ILC. Read More

This document is meant to provide semi-quantitative arguments to evaluate the luminosity needed at ILC to achieve a precise measurement of the Higgs mass, width and invisible decays. It is shown that for mH=120 GeV, one can save an order of magnitude on the luminosity needed to achieve a given precision on the Higgs mass, as compared to what can be obtained at \sqrt s=350 GeV, by running near threshold. Since the recoil mass resolution near threshold is independent of the Higgs mass, one can also access the Higgs width for masses above 170 GeV. Read More

The ILC accelerator parameters and detector concepts are still under discussion in the world-wide community. As will be shown, the performance of the BeamCal, the calorimeter in the very forward area of the ILC detector, is very sensitive to the beam parameter and crossing angle choices. We propose here BeamCal designs for a small (0 or 2 mrad) and large (20 mrad) crossing angles and report about the veto performance study done. Read More

In this paper we use current and proposed final doublet magnet technologies to reoptimise the interaction region of the International Linear Collider and reduce the power losses. The result is a set of three new final doublet layouts with improved beam transport properties. The effect of localised power deposition is considered, and its reduction using Tungsten liners. Read More

An interaction region (IR) with head-on collisions is considered as an alternative to the baseline configuration of the International Linear Collider (ILC) which includes two IRs with finite crossing-angles (2 and 20 mrad). Although more challenging for the beam extraction, the head-on scheme is favoured by the experiments because it allows a more convenient detector configuration, particularly in the forward region. The optics of the head-on extraction is revisited by separating the e+ and e- beams horizontally, first by electrostatic separators operated at their LEP nominal field and then using a defocusing quadrupole of the final focus beam line. Read More

The e-e- running mode is one of the interesting physics options at the International Linear Collider (ILC). The luminosity for e-e- collisions is reduced by the beam-beam effects. The resulting beamstrahlung energy loss and beam-beam deflection angles as function of the vertical transverse offset are different compared to the e+e- collisions. Read More

2006Jul
Affiliations: 1Cockcroft Inst.-UK, 2LAL-France, 3LAL-France, 4Uppsala Univ.-Sweden

The study of beam transport is of central importance to the design and performance assessment of modern particle accelerators. In this work, we benchmark two contemporary codes - DIMAD and BDSIM, the latter being a relatively new tracking code built within the framework of GEANT4. We consider both the 20 mrad and 2 mrad extraction lines of the International Linear Collider (ILC) and we perform tracking studies of heavily disrupted post-collision electron beams. Read More

2006Jul
Affiliations: 1Cockcroft Inst.-UK, 2CCLRC-UK, 3LAL-France, 4LAL-France, 5BNL-USA, 6SLAC-USA, 7SLAC-USA, 8SLAC-USA, 9SLAC-USA, 10SLAC-USA, 11John Adams Inst.-UK, 12CEA-France

A complete optics design for the 2mrad crossing angle interaction region and extraction line was presented at Snowmass 2005. Since this time, the design task force has been working on developing and improving the performance of the extraction line. The work has focused on optimising the final doublet parameters and on reducing the power losses resulting from the disrupted beam transport. Read More

2006Jul
Affiliations: 1Cockcroft Inst.-UK, 2LAL-France, 3LAL-France, 4Uppsala Univ.-Sweden

The study of beam transport is of central importance to the design and performance assessment of modern particle accelerators. In this paper, we benchmark two contemporary codes, DIMAD and BDSIM, the latter being a relatively new tracking code built within the framework of GEANT4. We consider both the 20 mrad and 2 mrad extraction lines of the 500 GeV International Linear Collider (ILC) and we perform particle tracking studies of heavily disrupted post-collision electron beams. Read More

The ILC baseline consists of two interaction regions, one with a 20mrad crossing angle and the other with a 2mrad crossing angle. It is known that the outgoing beam losses in the final doublet and subsequent extraction line are larger in the 2mrad than in the 20mrad layout. In this work, we exploit NbTi and Nb$_3$Sn superconducting magnet technologies to redesign and optimise the final doublet, with the aim of providing satisfactory outgoing disrupted beam power losses in this region. Read More

The current status of the 2mrad crossing angle layout for the ILC is reviewed. The scheme developed in the UK and France is described and the performance discussed for a TeV machine. Secondly, the scheme developed at SLAC and BNL is then studied and modified for a TeV machine. Read More

The formulation of hybrid crossing angle schemes has been a recent development of the TESLA collision geometry debate. Here we report on two such schemes, characterised by either a small vertical or horizontal beam crossing angle. Read More

This paper presents the detection issues for the lightest slepton \tilde{\tau}_1 at a future e^+e^- TeV collider given the dark matter constraints set on the SUSY mass spectrum by the WMAP results. It intends to illustrate the importance of an optimal detection of energetic electrons in the very forward region for an efficient rejection of the \gamma\gamma background. The TESLA parameters have been used in the case of head-on collisions and in the case of a 10, mrad half crossing angle. Read More

Electroweak processes with four fermions in the final state were measured extensively at LEP-2 in e+e- collisions with centre-of-mass energies up to 209 GeV. By combining the results obtained by Aleph, Delphi, L3 and Opal, the predictions from the Standard Model were probed at the level of their present accuracy. An important outcome was the possibility to measure the predicted charged triple gauge boson self-couplings with a precision of a few percent. Read More

Using recent measurements of the b-quark fragmentation distribution obtained in $e^+e^- \to b \bar{b}$ events registered at the Z pole, the non-perturbative QCD component of the distribution has been extracted independently of any hadronic physics modelling. This distribution depends only on the way the perturbative QCD component has been defined. When the perturbative QCD component is taken from a parton shower Monte-Carlo, the non-perturbative QCD component is rather similar with those obtained from the Lund or Bowler models. Read More

The activities of the QCD working group concentrated on improving the understanding and Monte Carlo simulation of multi-jet final states due to hard QCD processes at LEP, i.e. quark-antiquark plus multi-gluon and/or secondary quark production, with particular emphasis on four-jet final states and b-quark mass effects. Read More

This report summarises the results of the four-fermion working group of the LEP2-MC workshop, held at CERN from 1999 to 2000. Recent developments in the calculation of four-fermion processes in electron-positron collisions at LEP-2 centre-of-mass energies are presented, concentrating on predictions for four main reactions: W-pair production, visible photons in four-fermion events, single-W production and Z-pair production. Based on a comparison of results derived within different approaches, theoretical uncertainties on these predictions are established. Read More

In this report we review the prospects for Higgs physics at LEP2. The theoretical aspects and the phenomenology of Higgs particles are discussed within the Standard Model (SM) and the Minimal Supersymmetric Standard Model (MSSM). The experimental search techniques are described and the discovery limits for Higgs bosons in the LEP2 energy range are summarized. Read More