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9 results on '"D. Neuffer"'

1. Operation of normal-conducting rf cavities in multi-Tesla magnetic fields for muon ionization cooling: A feasibility demonstration

Author

D. Bowring, A. Bross, P. Lane, M. Leonova, A. Moretti, D. Neuffer, R. Pasquinelli, D. Peterson, M. Popovic, D. Stratakis, K. Yonehara, A. Kochemirovskiy, Y. Torun, C. Adolphsen, L. Ge, A. Haase, Z. Li, D. Martin, M. Chung, D. Li, T. Luo, B. Freemire, A. Liu, and M. Palmer

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Ionization cooling is the preferred method for producing bright muon beams. This cooling technique requires the operation of normal conducting, radio-frequency (rf) accelerating cavities within the multi-tesla fields of dc solenoid magnets. Under these conditions, cavities exhibit increased susceptibility to rf breakdown, which can damage cooling channel components and imposes limits on channel length and transmission efficiency. We report, for the first time, stable high-vacuum, normal-conducting cavity operation at gradients of 50 MV/m in an external magnetic field of three tesla, through the use of beryllium cavity elements. This eliminates a significant technical risk that has previously been inherent in ionization cooling channel designs.

Published
2020
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2. Lattice design and expected performance of the Muon Ionization Cooling Experiment demonstration of ionization cooling

Author

M. Bogomilov, R. Tsenov, G. Vankova-Kirilova, Y. Song, J. Tang, Z. Li, R. Bertoni, M. Bonesini, F. Chignoli, R. Mazza, V. Palladino, A. de Bari, G. Cecchet, D. Orestano, L. Tortora, Y. Kuno, S. Ishimoto, F. Filthaut, D. Jokovic, D. Maletic, M. Savic, O. M. Hansen, S. Ramberger, M. Vretenar, R. Asfandiyarov, A. Blondel, F. Drielsma, Y. Karadzhov, G. Charnley, N. Collomb, K. Dumbell, A. Gallagher, A. Grant, S. Griffiths, T. Hartnett, B. Martlew, A. Moss, A. Muir, I. Mullacrane, A. Oates, P. Owens, G. Stokes, P. Warburton, C. White, D. Adams, R. J. Anderson, P. Barclay, V. Bayliss, J. Boehm, T. W. Bradshaw, M. Courthold, V. Francis, L. Fry, T. Hayler, M. Hills, A. Lintern, C. Macwaters, A. Nichols, R. Preece, S. Ricciardi, C. Rogers, T. Stanley, J. Tarrant, M. Tucker, A. Wilson, S. Watson, R. Bayes, J. C. Nugent, F. J. P. Soler, R. Gamet, G. Barber, V. J. Blackmore, D. Colling, A. Dobbs, P. Dornan, C. Hunt, A. Kurup, J.-B. Lagrange, K. Long, J. Martyniak, S. Middleton, J. Pasternak, M. A. Uchida, J. H. Cobb, W. Lau, C. N. Booth, P. Hodgson, J. Langlands, E. Overton, M. Robinson, P. J. Smith, S. Wilbur, A. J. Dick, K. Ronald, C. G. Whyte, A. R. Young, S. Boyd, P. Franchini, J. R. Greis, C. Pidcott, I. Taylor, R. B. S. Gardener, P. Kyberd, J. J. Nebrensky, M. Palmer, H. Witte, A. D. Bross, D. Bowring, A. Liu, D. Neuffer, M. Popovic, P. Rubinov, A. DeMello, S. Gourlay, D. Li, S. Prestemon, S. Virostek, B. Freemire, P. Hanlet, D. M. Kaplan, T. A. Mohayai, D. Rajaram, P. Snopok, V. Suezaki, Y. Torun, Y. Onel, L. M. Cremaldi, D. A. Sanders, D. J. Summers, G. G. Hanson, and C. Heidt

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

Muon beams of low emittance provide the basis for the intense, well-characterized neutrino beams necessary to elucidate the physics of flavor at a neutrino factory and to provide lepton-antilepton collisions at energies of up to several TeV at a muon collider. The international Muon Ionization Cooling Experiment (MICE) aims to demonstrate ionization cooling, the technique by which it is proposed to reduce the phase-space volume occupied by the muon beam at such facilities. In an ionization-cooling channel, the muon beam passes through a material in which it loses energy. The energy lost is then replaced using rf cavities. The combined effect of energy loss and reacceleration is to reduce the transverse emittance of the beam (transverse cooling). A major revision of the scope of the project was carried out over the summer of 2014. The revised experiment can deliver a demonstration of ionization cooling. The design of the cooling demonstration experiment will be described together with its predicted cooling performance.

Published
2017
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3. Publisher’s Note: High intensity neutrino oscillation facilities in Europe [Phys. Rev. Accel. Beams 16, 021002 (2013)]

Author

T. R. Edgecock, O. Caretta, T. Davenne, C. Densam, M. Fitton, D. Kelliher, P. Loveridge, S. Machida, C. Prior, C. Rogers, M. Rooney, J. Thomason, D. Wilcox, E. Wildner, I. Efthymiopoulos, R. Garoby, S. Gilardoni, C. Hansen, E. Benedetto, E. Jensen, A. Kosmicki, M. Martini, J. Osborne, G. Prior, T. Stora, T. Melo Mendonca, V. Vlachoudis, C. Waaijer, P. Cupial, A. Chance, A. Longhin, J. Payet, M. Zito, E. Baussan, C. Bobeth, E. Bouquerel, M. Dracos, G. Gaudiot, B. Lepers, F. Osswald, P. Poussot, N. Vassilopoulos, J. Wurtz, V. Zeter, J. Bielski, M. Kozien, L. Lacny, B. Skoczen, B. Szybinski, A. Ustrzycka, A. Wroblewski, M. Marie-Jeanne, P. Balint, C. Fourel, J. Giraud, J. Jacob, T. Lamy, L. Latrasse, P. Sortais, T. Thuillier, S. Mitrofanov, M. Loiselet, Th. Keutgen, Th. Delbar, F. Debray, C. Trophine, S. Veys, C. Daversin, V. Zorin, I. Izotov, V. Skalyga, G. Burt, A. C. Dexter, V. L. Kravchuk, T. Marchi, M. Cinausero, F. Gramegna, G. De Angelis, G. Prete, G. Collazuol, M. Laveder, M. Mazzocco, M. Mezzetto, C. Signorini, E. Vardaci, A. Di Nitto, A. Brondi, G. La Rana, P. Migliozzi, R. Moro, V. Palladino, N. Gelli, D. Berkovits, M. Hass, T. Y. Hirsh, M. Schaumann, A. Stahl, J. Wehner, A. Bross, J. Kopp, D. Neuffer, R. Wands, R. Bayes, A. Laing, P. Soler, S. K. Agarwalla, A. Cervera Villanueva, A. Donini, T. Ghosh, J. J. Gomez Cadenas, P. Hernandez, J. Martin-Albo, O. Mena, J. Burguet-Castell, L. Agostino, M. Buizza-Avanzini, M. Marafini, T. Patzak, A. Tonazzo, D. Duchesneau, L. Mosca, M. Bogomilov, Y. Karadzhov, R. Matev, R. Tsenov, E. Akhmedov, M. Blennow, M. Lindner, T. Schwetz, E. Fernandez Martinez, M. Maltoni, J. Menendez, C. Giunti, M. C. Gonzalez Garcia, J. Salvado, P. Coloma, P. Huber, T. Li, J. Lopez Pavon, C. Orme, S. Pascoli, D. Meloni, J. Tang, W. Winter, T. Ohlsson, H. Zhang, L. Scotto-Lavina, F. Terranova, M. Bonesini, L. Tortora, A. Alekou, M. Aslaninejad, C. Bontoiu, A. Kurup, L. J. Jenner, K. Long, J. Pasternak, J. Pozimski, J. J. Back, P. Harrison, K. Beard, A. Bogacz, J. S. Berg, D. Stratakis, H. Witte, P. Snopok, N. Bliss, M. Cordwell, A. Moss, S. Pattalwar, and M. Apollonio

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Published
2016
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4. Neutrino factory

Author

M. Bogomilov, R. Matev, R. Tsenov, M. Dracos, M. Bonesini, V. Palladino, L. Tortora, Y. Mori, T. Planche, J. B. Lagrange, Y. Kuno, E. Benedetto, I. Efthymiopoulos, R. Garoby, S. Gilardoini, M. Martini, E. Wildner, G. Prior, A. Blondel, Y. Karadzhow, M. Ellis, P. Kyberd, R. Bayes, A. Laing, F. J. P. Soler, A. Alekou, M. Apollonio, M. Aslaninejad, C. Bontoiu, L. J. Jenner, A. Kurup, K. Long, J. Pasternak, A. Zarrebini, J. Poslimski, V. Blackmore, J. Cobb, C. Tunnell, C. Andreopoulos, J. R. J. Bennett, S. Brooks, O. Caretta, T. Davenne, C. Densham, T. R. Edgecock, M. Fitton, D. Kelliher, P. Loveridge, A. McFarland, S. Machida, C. Prior, G. Rees, C. Rogers, M. Rooney, J. Thomason, D. Wilcox, C. Booth, G. Skoro, J. J. Back, P. Harrison, J. S. Berg, R. Fernow, J. C. Gallardo, R. Gupta, H. Kirk, N. Simos, D. Stratakis, N. Souchlas, H. Witte, A. Bross, S. Geer, C. Johnstone, N. Makhov, D. Neuffer, M. Popovic, J. Strait, S. Striganov, J. G. Morfín, R. Wands, P. Snopok, S. A. Bagacz, V. Morozov, Y. Roblin, D. Cline, X. Ding, C. Bromberg, T. Hart, R. J. Abrams, C. M. Ankenbrandt, K. B. Beard, M. A. C. Cummings, G. Flanagan, R. P. Johnson, T. J. Roberts, C. Y. Yoshikawa, V. B. Graves, K. T. McDonald, L. Coney, and G. Hanson

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

The properties of the neutrino provide a unique window on physics beyond that described by the standard model. The study of subleading effects in neutrino oscillations, and the race to discover CP-invariance violation in the lepton sector, has begun with the recent discovery that θ_{13}>0. The measured value of θ_{13} is large, emphasizing the need for a facility at which the systematic uncertainties can be reduced to the percent level. The neutrino factory, in which intense neutrino beams are produced from the decay of muons, has been shown to outperform all realistic alternatives and to be capable of making measurements of the requisite precision. Its unique discovery potential arises from the fact that only at the neutrino factory is it practical to produce high-energy electron (anti)neutrino beams of the required intensity. This paper presents the conceptual design of the neutrino factory accelerator facility developed by the European Commission Framework Programme 7 EUROν Design Study consortium. EUROν coordinated the European contributions to the International Design Study for the Neutrino Factory (the IDS-NF) collaboration. The EUROν baseline accelerator facility will provide 10^{21} muon decays per year from 12.6 GeV stored muon beams serving a single neutrino detector situated at a source-detector distance of between 1 500 km and 2 500 km. A suite of near detectors will allow definitive neutrino-scattering experiments to be performed.

Published
2014
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5. Muon front end for the neutrino factory

Author

C. T. Rogers, D. Stratakis, G. Prior, S. Gilardoni, D. Neuffer, P. Snopok, A. Alekou, and J. Pasternak

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

In the neutrino factory, muons are produced by firing high-energy protons onto a target to produce pions. The pions decay to muons and pass through a capture channel known as the muon front end, before acceleration to 12.6 GeV. The muon front end comprises a variable frequency rf system for longitudinal capture and an ionization cooling channel. In this paper we detail recent improvements in the design of the muon front end.

Published
2013
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6. High intensity neutrino oscillation facilities in Europe

Author

T. R. Edgecock, O. Caretta, T. Davenne, C. Densam, M. Fitton, D. Kelliher, P. Loveridge, S. Machida, C. Prior, C. Rogers, M. Rooney, J. Thomason, D. Wilcox, E. Wildner, I. Efthymiopoulos, R. Garoby, S. Gilardoni, C. Hansen, E. Benedetto, E. Jensen, A. Kosmicki, M. Martini, J. Osborne, G. Prior, T. Stora, T. Melo Mendonca, V. Vlachoudis, C. Waaijer, P. Cupial, A. Chancé, A. Longhin, J. Payet, M. Zito, E. Baussan, C. Bobeth, E. Bouquerel, M. Dracos, G. Gaudiot, B. Lepers, F. Osswald, P. Poussot, N. Vassilopoulos, J. Wurtz, V. Zeter, J. Bielski, M. Kozien, L. Lacny, B. Skoczen, B. Szybinski, A. Ustrzycka, A. Wroblewski, M. Marie-Jeanne, P. Balint, C. Fourel, J. Giraud, J. Jacob, T. Lamy, L. Latrasse, P. Sortais, T. Thuillier, S. Mitrofanov, M. Loiselet, Th. Keutgen, Th. Delbar, F. Debray, C. Trophine, S. Veys, C. Daversin, V. Zorin, I. Izotov, V. Skalyga, G. Burt, A. C. Dexter, V. L. Kravchuk, T. Marchi, M. Cinausero, F. Gramegna, G. De Angelis, G. Prete, G. Collazuol, M. Laveder, M. Mazzocco, M. Mezzetto, C. Signorini, E. Vardaci, A. Di Nitto, A. Brondi, G. La Rana, P. Migliozzi, R. Moro, V. Palladino, N. Gelli, D. Berkovits, M. Hass, T. Y. Hirsh, M. Schaumann, A. Stahl, J. Wehner, A. Bross, J. Kopp, D. Neuffer, R. Wands, R. Bayes, A. Laing, P. Soler, S. K. Agarwalla, A. Cervera Villanueva, A. Donini, T. Ghosh, J. J. Gómez Cadenas, P. Hernández, J. Martín-Albo, O. Mena, J. Burguet-Castell, L. Agostino, M. Buizza-Avanzini, M. Marafini, T. Patzak, A. Tonazzo, D. Duchesneau, L. Mosca, M. Bogomilov, Y. Karadzhov, R. Matev, R. Tsenov, E. Akhmedov, M. Blennow, M. Lindner, T. Schwetz, E. Fernández Martinez, M. Maltoni, J. Menéndez, C. Giunti, M. C. González García, J. Salvado, P. Coloma, P. Huber, T. Li, J. López Pavón, C. Orme, S. Pascoli, D. Meloni, J. Tang, W. Winter, T. Ohlsson, H. Zhang, L. Scotto-Lavina, F. Terranova, M. Bonesini, L. Tortora, A. Alekou, M. Aslaninejad, C. Bontoiu, A. Kurup, L. J. Jenner, K. Long, J. Pasternak, J. Pozimski, J. J. Back, P. Harrison, K. Beard, A. Bogacz, J. S. Berg, D. Stratakis, H. Witte, P. Snopok, N. Bliss, M. Cordwell, A. Moss, S. Pattalwar, and M. Apollonio

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

The EUROnu project has studied three possible options for future, high intensity neutrino oscillation facilities in Europe. The first is a Super Beam, in which the neutrinos come from the decay of pions created by bombarding targets with a 4 MW proton beam from the CERN High Power Superconducting Proton Linac. The far detector for this facility is the 500 kt MEMPHYS water Cherenkov, located in the Fréjus tunnel. The second facility is the Neutrino Factory, in which the neutrinos come from the decay of μ^{+} and μ^{-} beams in a storage ring. The far detector in this case is a 100 kt magnetized iron neutrino detector at a baseline of 2000 km. The third option is a Beta Beam, in which the neutrinos come from the decay of beta emitting isotopes, in particular ^{6}He and ^{18}Ne, also stored in a ring. The far detector is also the MEMPHYS detector in the Fréjus tunnel. EUROnu has undertaken conceptual designs of these facilities and studied the performance of the detectors. Based on this, it has determined the physics reach of each facility, in particular for the measurement of CP violation in the lepton sector, and estimated the cost of construction. These have demonstrated that the best facility to build is the Neutrino Factory. However, if a powerful proton driver is constructed for another purpose or if the MEMPHYS detector is built for astroparticle physics, the Super Beam also becomes very attractive.

Published
2013
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7. Low-energy neutrino factory design

Author

C. Ankenbrandt, S. A. Bogacz, A. Bross, S. Geer, C. Johnstone, D. Neuffer, and M. Popovic

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

The design of a low-energy (4 GeV) neutrino factory (NF) is described, along with its expected performance. The neutrino factory uses a high-energy proton beam to produce charged pions. The π^{±} decay to produce muons (μ^{±}), which are collected, accelerated, and stored in a ring with long straight sections. Muons decaying in the straight sections produce neutrino beams. The scheme is based on previous designs for higher energy neutrino factories, but has an improved bunching and phase rotation system, and new acceleration, storage ring, and detector schemes tailored to the needs of the lower energy facility. Our simulations suggest that the NF scheme we describe can produce neutrino beams generated by ∼1.4×10^{21} μ^{+} per year decaying in a long straight section of the storage ring, and a similar number of μ^{-} decays.

Published
2009
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8. Cost-effective design for a neutrino factory

Author

J. S. Berg, S. A. Bogacz, S. Caspi, J. Cobb, R. C. Fernow, J. C. Gallardo, S. Kahn, H. Kirk, D. Neuffer, R. Palmer, K. Paul, H. Witte, and M. Zisman

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

There have been active efforts in the U.S., Europe, and Japan on the design of a neutrino factory. This type of facility produces intense beams of neutrinos from the decay of muons in a high-energy storage ring. In the U.S., a second detailed feasibility study (FS2) for a neutrino factory was completed in 2001. Since that report was published, new ideas in bunching, cooling, and acceleration of muon beams have been developed. We have incorporated these ideas into a new facility design, which we designate as study 2B (ST2B), that should lead to significant cost savings over the FS2 design.

Published
2006
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9. Synchrotron frequency spread independence of bunched-beam stochastic cooling at the Fermilab Recycler

Author

D. Broemmelsiek, A. Burov, S. Nagaitsev, and D. Neuffer

Subjects
Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

It is generally accepted that longitudinal stochastic cooling of bunched beams is not possible without a synchrotron frequency spread. Experiments in the Fermilab Recycler storage ring demonstrate the opposite: with an antiproton bunch in a parabolic potential well (no synchrotron frequency spread), the cooling was almost as efficient as in a trapezoidal potential well (with a relative synchrotron frequency spread of ∼100%). A possible explanation is that, at Recycler parameters, diffusion processes are sufficient to provide particle mixing.

Published
2005
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