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  1. Book ; Online: Challenges and Lessons Learned from fabrication, testing and analysis of eight MQXFA Low Beta Quadrupole magnets for HL-LHC

    Ambrosio, G. / Amm, K. / Anerella, M. / Apollinari, G. / Izquierdo, G. Arnau / Baldini, M. / Ballarino, A. / Barth, C. / Yahia, A. Ben / Blowers, J. / De Sousa, P. Borges / Bossert, R. / Bulat, B. / Carcagno, R. / Cheng, D. W. / Chlachidze, G. / Cooley, L. / Crouvizier, M. / Devred, A. /
    DiMarco, J. / Feher, S. / Ferracin, P. / Troitino, J. Ferradas / Fajardo, L. Garcia / Gourlay, S. / Hocker, H. M. / Bermudez, S. Izquierdo / Joshi, P. / Krave, S. / Lee, E. M. / Levitan, J. / Lombardo, V. / Lu, J. / Marchevsky, M. / Marinozzi, V. / Moros, A. / Muratore, J. / Naus, M. / Nobrega, F. / Page, T. / Pong, I. / Perez, J. C. / Prestemon, S. / Ravaioli, E. / Ray, K. L. / Sabbi, G. / Schmalzle, J. / Seyl, J. / Sgobba, S. / Stoynev, S. / Strauss, T. / Todesco, E. / Turrioni, D. / Vallone, G. / Van Weelderen, R. / Wanderer, P. / Wang, X. / Yu, M.

    2023  

    Abstract: By the end of October 2022, the US HL-LHC Accelerator Upgrade Project (AUP) had completed fabrication of ten MQXFA magnets and tested eight of them. The MQXFA magnets are the low beta quadrupole magnets to be used in the Q1 and Q3 Inner Triplet elements ... ...

    Abstract By the end of October 2022, the US HL-LHC Accelerator Upgrade Project (AUP) had completed fabrication of ten MQXFA magnets and tested eight of them. The MQXFA magnets are the low beta quadrupole magnets to be used in the Q1 and Q3 Inner Triplet elements of the High Luminosity LHC. This AUP effort is shared by BNL, Fermilab, and LBNL, with strand verification tests at NHMFL. An important step of the AUP QA plan is the testing of MQXFA magnets in a vertical cryostat at BNL. The acceptance criteria that could be tested at BNL were all met by the first four production magnets (MQXFA03-MQXFA06). Subsequently, two magnets (MQXFA07 and MQXFA08) did not meet some criteria and were disassembled. Lessons learned during the disassembly of MQXFA07 caused a revision to the assembly specifications that were used for MQXFA10 and subsequent magnets. In this paper, we present a summary of: 1) the fabrication and test data of all the MQXFA magnets; 2) the analysis of MQXFA07/A08 test results with characterization of the limiting mechanism; 3) the outcome of the investigation, including the lessons learned during MQXFA07 disassembly; and 4) the finite element analysis correlating observations with test performance.
    Keywords Physics - Accelerator Physics
    Subject code 621
    Publishing date 2023-01-23
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Experimental Demonstration of Hadron Beam Cooling Using Radio-Frequency Accelerated Electron Bunches.

    Fedotov, A V / Altinbas, Z / Belomestnykh, S / Ben-Zvi, I / Blaskiewicz, M / Brennan, M / Bruno, D / Brutus, C / Costanzo, M / Drees, A / Fischer, W / Fite, J / Gaowei, M / Gassner, D / Gu, X / Halinski, J / Hamdi, K / Hammons, L / Harvey, M /
    Hayes, T / Hulsart, R / Inacker, P / Jamilkowski, J / Jing, Y / Kewisch, J / Kankiya, P / Kayran, D / Lehn, R / Liaw, C J / Litvinenko, V / Liu, C / Ma, J / Mahler, G / Mapes, M / Marusic, A / Mernick, K / Mi, C / Michnoff, R / Miller, T / Minty, M / Narayan, G / Nayak, S / Nguyen, L / Paniccia, M / Pinayev, I / Polizzo, S / Ptitsyn, V / Rao, T / Robert-Demolaize, G / Roser, T / Sandberg, J / Schoefer, V / Schultheiss, C / Seletskiy, S / Severino, F / Shrey, T / Smart, L / Smith, K / Song, H / Sukhanov, A / Than, R / Thieberger, P / Trabocchi, S / Tuozzolo, J / Wanderer, P / Wang, E / Wang, G / Weiss, D / Xiao, B / Xin, T / Xu, W / Zaltsman, A / Zhao, H / Zhao, Z

    Physical review letters

    2019  Volume 124, Issue 8, Page(s) 84801

    Abstract: Cooling of beams of gold ions using electron bunches accelerated with radio-frequency systems was recently experimentally demonstrated in the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. Such an approach is new and opens the ... ...

    Abstract Cooling of beams of gold ions using electron bunches accelerated with radio-frequency systems was recently experimentally demonstrated in the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. Such an approach is new and opens the possibility of using this technique at higher energies than possible with electrostatic acceleration of electron beams. The challenges of this approach include generation of electron beams suitable for cooling, delivery of electron bunches of the required quality to the cooling sections without degradation of beam angular divergence and energy spread, achieving the required small angles between electron and ion trajectories in the cooling sections, precise velocity matching between the two beams, high-current operation of the electron accelerator, as well as several physics effects related to bunched-beam cooling. Here we report on the first demonstration of cooling hadron beams using this new approach.
    Language English
    Publishing date 2019-04-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.124.084801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Indication of electron neutrino appearance from an accelerator-produced off-axis muon neutrino beam.

    Abe, K / Abgrall, N / Ajima, Y / Aihara, H / Albert, J B / Andreopoulos, C / Andrieu, B / Aoki, S / Araoka, O / Argyriades, J / Ariga, A / Ariga, T / Assylbekov, S / Autiero, D / Badertscher, A / Barbi, M / Barker, G J / Barr, G / Bass, M /
    Bay, F / Bentham, S / Berardi, V / Berger, B E / Bertram, I / Besnier, M / Beucher, J / Beznosko, D / Bhadra, S / Blaszczyk, F d M M / Blondel, A / Bojechko, C / Bouchez, J / Boyd, S B / Bravar, A / Bronner, C / Brook-Roberge, D G / Buchanan, N / Budd, H / Calvet, D / Cartwright, S L / Carver, A / Castillo, R / Catanesi, M G / Cazes, A / Cervera, A / Chavez, C / Choi, S / Christodoulou, G / Coleman, J / Coleman, W / Collazuol, G / Connolly, K / Curioni, A / Dabrowska, A / Danko, I / Das, R / Davies, G S / Davis, S / Day, M / De Rosa, G / de André, J P A M / de Perio, P / Delbart, A / Densham, C / Di Lodovico, F / Di Luise, S / Dinh Tran, P / Dobson, J / Dore, U / Drapier, O / Dufour, F / Dumarchez, J / Dytman, S / Dziewiecki, M / Dziomba, M / Emery, S / Ereditato, A / Escudero, L / Esposito, L S / Fechner, M / Ferrero, A / Finch, A J / Frank, E / Fujii, Y / Fukuda, Y / Galymov, V / Gannaway, F C / Gaudin, A / Gendotti, A / George, M A / Giffin, S / Giganti, C / Gilje, K / Golan, T / Goldhaber, M / Gomez-Cadenas, J J / Gonin, M / Grant, N / Grant, A / Gumplinger, P / Guzowski, P / Haesler, A / Haigh, M D / Hamano, K / Hansen, C / Hansen, D / Hara, T / Harrison, P F / Hartfiel, B / Hartz, M / Haruyama, T / Hasegawa, T / Hastings, N C / Hastings, S / Hatzikoutelis, A / Hayashi, K / Hayato, Y / Hearty, C / Helmer, R L / Henderson, R / Higashi, N / Hignight, J / Hirose, E / Holeczek, J / Horikawa, S / Hyndman, A / Ichikawa, A K / Ieki, K / Ieva, M / Iida, M / Ikeda, M / Ilic, J / Imber, J / Ishida, T / Ishihara, C / Ishii, T / Ives, S J / Iwasaki, M / Iyogi, K / Izmaylov, A / Jamieson, B / Johnson, R A / Joo, K K / Jover-Manas, G V / Jung, C K / Kaji, H / Kajita, T / Kakuno, H / Kameda, J / Kaneyuki, K / Karlen, D / Kasami, K / Kato, I / Kearns, E / Khabibullin, M / Khanam, F / Khotjantsev, A / Kielczewska, D / Kikawa, T / Kim, J / Kim, J Y / Kim, S B / Kimura, N / Kirby, B / Kisiel, J / Kitching, P / Kobayashi, T / Kogan, G / Koike, S / Konaka, A / Kormos, L L / Korzenev, A / Koseki, K / Koshio, Y / Kouzuma, Y / Kowalik, K / Kravtsov, V / Kreslo, I / Kropp, W / Kubo, H / Kudenko, Y / Kulkarni, N / Kurjata, R / Kutter, T / Lagoda, J / Laihem, K / Laveder, M / Lee, K P / Le, P T / Levy, J M / Licciardi, C / Lim, I T / Lindner, T / Litchfield, R P / Litos, M / Longhin, A / Lopez, G D / Loverre, P F / Ludovici, L / Lux, T / Macaire, M / Mahn, K / Makida, Y / Malek, M / Manly, S / Marchionni, A / Marino, A D / Marteau, J / Martin, J F / Maruyama, T / Maryon, T / Marzec, J / Masliah, P / Mathie, E L / Matsumura, C / Matsuoka, K / Matveev, V / Mavrokoridis, K / Mazzucato, E / McCauley, N / McFarland, K S / McGrew, C / McLachlan, T / Messina, M / Metcalf, W / Metelko, C / Mezzetto, M / Mijakowski, P / Miller, C A / Minamino, A / Mineev, O / Mine, S / Missert, A D / Mituka, G / Miura, M / Mizouchi, K / Monfregola, L / Moreau, F / Morgan, B / Moriyama, S / Muir, A / Murakami, A / Murdoch, M / Murphy, S / Myslik, J / Nakadaira, T / Nakahata, M / Nakai, T / Nakajima, K / Nakamoto, T / Nakamura, K / Nakayama, S / Nakaya, T / Naples, D / Navin, M L / Nelson, B / Nicholls, T C / Nishikawa, K / Nishino, H / Nowak, J A / Noy, M / Obayashi, Y / Ogitsu, T / Ohhata, H / Okamura, T / Okumura, K / Okusawa, T / Oser, S M / Otani, M / Owen, R A / Oyama, Y / Ozaki, T / Pac, M Y / Palladino, V / Paolone, V / Paul, P / Payne, D / Pearce, G F / Perkin, J D / Pettinacci, V / Pierre, F / Poplawska, E / Popov, B / Posiadala, M / Poutissou, J-M / Poutissou, R / Przewlocki, P / Qian, W / Raaf, J L / Radicioni, E / Ratoff, P N / Raufer, T M / Ravonel, M / Raymond, M / Retiere, F / Robert, A / Rodrigues, P A / Rondio, E / Roney, J M / Rossi, B / Roth, S / Rubbia, A / Ruterbories, D / Sabouri, S / Sacco, R / Sakashita, K / Sánchez, F / Sarrat, A / Sasaki, K / Scholberg, K / Schwehr, J / Scott, M / Scully, D I / Seiya, Y / Sekiguchi, T / Sekiya, H / Shibata, M / Shimizu, Y / Shiozawa, M / Short, S / Siyad, M / Smith, R J / Smy, M / Sobczyk, J T / Sobel, H / Sorel, M / Stahl, A / Stamoulis, P / Steinmann, J / Still, B / Stone, J / Strabel, C / Sulak, L R / Sulej, R / Sutcliffe, P / Suzuki, A / Suzuki, K / Suzuki, S / Suzuki, S Y / Suzuki, Y / Szeglowski, T / Szeptycka, M / Tacik, R / Tada, M / Takahashi, S / Takeda, A / Takenaga, Y / Takeuchi, Y / Tanaka, K / Tanaka, H A / Tanaka, M / Tanaka, M M / Tanimoto, N / Tashiro, K / Taylor, I / Terashima, A / Terhorst, D / Terri, R / Thompson, L F / Thorley, A / Toki, W / Tomaru, T / Totsuka, Y / Touramanis, C / Tsukamoto, T / Tzanov, M / Uchida, Y / Ueno, K / Vacheret, A / Vagins, M / Vasseur, G / Wachala, T / Walding, J J / Waldron, A V / Walter, C W / Wanderer, P J / Wang, J / Ward, M A / Ward, G P / Wark, D / Wascko, M O / Weber, A / Wendell, R / West, N / Whitehead, L H / Wikström, G / Wilkes, R J / Wilking, M J / Wilson, J R / Wilson, R J / Wongjirad, T / Yamada, S / Yamada, Y / Yamamoto, A / Yamamoto, K / Yamanoi, Y / Yamaoka, H / Yanagisawa, C / Yano, T / Yen, S / Yershov, N / Yokoyama, M / Zalewska, A / Zalipska, J / Zambelli, L / Zaremba, K / Ziembicki, M / Zimmerman, E D / Zito, M / Żmuda, J

    Physical review letters

    2011  Volume 107, Issue 4, Page(s) 41801

    Abstract: The T2K experiment observes indications of ν(μ) → ν(e) appearance in data accumulated with 1.43×10(20) protons on target. Six events pass all selection criteria at the far detector. In a three-flavor neutrino oscillation scenario with |Δm(23)(2)| = 2.4× ... ...

    Abstract The T2K experiment observes indications of ν(μ) → ν(e) appearance in data accumulated with 1.43×10(20) protons on target. Six events pass all selection criteria at the far detector. In a three-flavor neutrino oscillation scenario with |Δm(23)(2)| = 2.4×10(-3)  eV(2), sin(2)2θ(23) = 1 and sin(2)2θ(13) = 0, the expected number of such events is 1.5±0.3(syst). Under this hypothesis, the probability to observe six or more candidate events is 7×10(-3), equivalent to 2.5σ significance. At 90% C.L., the data are consistent with 0.03(0.04) < sin(2)2θ(13) < 0.28(0.34) for δ(CP) = 0 and a normal (inverted) hierarchy.
    Language English
    Publishing date 2011-07-22
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.107.041801
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

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