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Physics & Astronomy Department, Northwestern University, Evanston, IL 60201-3112 Fermi National Accelerator Laboratory, Batavia, IL 60510 CERN, Esplande des Particules, 1211 Geneva 23, Switzerland Center for Neutrino Physics, Physics... more
Physics & Astronomy Department, Northwestern University, Evanston, IL 60201-3112 Fermi National Accelerator Laboratory, Batavia, IL 60510 CERN, Esplande des Particules, 1211 Geneva 23, Switzerland Center for Neutrino Physics, Physics Department, Virginia Tech, Blacksburg, VA 24061 Perimeter Institute for Theoretical Physics, Waterloo, ON N2J 2W9, Canada School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA Imperial College London, Exhibition Road, London, SW7 2AZ, UK STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX, UK Brookhaven National Laboratory, Upton, NY 11973
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TThe MuCool RF Program focuses on the study of normal conducting RF structures operating in high magnetic field for applications in muon ionization cooling for Neutrino Factories and Muon Colliders. This paper will give an overview of the... more
TThe MuCool RF Program focuses on the study of normal conducting RF structures operating in high magnetic field for applications in muon ionization cooling for Neutrino Factories and Muon Colliders. This paper will give an overview of the program, which will include a description of the test facility and its capabilities, the current test program, and the status of a cavity that can be rotated in the magnetic field which allows for a more detailed study of the maximum stable operating gradient vs. magnetic field strength and angle.
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Muon ionization cooling is the only practical method for preparing high-brilliance beams needed for a neutrino factoryor muon collider. The muon ionization cooling experiment (MICE) under development at the Rutherford AppletonLaboratory... more
Muon ionization cooling is the only practical method for preparing high-brilliance beams needed for a neutrino factoryor muon collider. The muon ionization cooling experiment (MICE) under development at the Rutherford AppletonLaboratory comprises a dedicated beamline to generate a range of input emittance and momentum, with time-of-ight and Cherenkov detectors to ensure a pure muon beam. A rst measurement of emittance is performed in theupstream magnetic spectrometer with a scintillating- ber tracker. A cooling cell will then follow, alternating energyloss in liquid hydrogen with RF acceleration. A second spectrometer identical to the rst and a particle identi cationsystem will measure the outgoing emittance. Plans for measurements of emittance and cooling are described.
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Use of optical fiber techniques particularly in particle tracking is discussed. Fundamental aspects of scintillating tracking detectors using the fiber-optic waveguide are described, including candidate core materials, fiber manufacture,... more
Use of optical fiber techniques particularly in particle tracking is discussed. Fundamental aspects of scintillating tracking detectors using the fiber-optic waveguide are described, including candidate core materials, fiber manufacture, properties of the scintillation materials and waveguides, attenuation length, and radiation resistance. The general consensus is expressed that most of the basic building blocks needed for fiber detector readout exist but
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Backward meson production in the reaction pi-p-->ppi-pi+pi- has been studied with use of a streamer chamber triggered by the detection of a fast forward proton. For... more
Backward meson production in the reaction pi-p-->ppi-pi+pi- has been studied with use of a streamer chamber triggered by the detection of a fast forward proton. For theta*<-0.98 we find no evidence of A1 or A2 production, and we determine total backward cross-section upper limits (95% confidence) of 0.93 and 0.72 mub, respectively. At m3pi=1.9 GeV/c2 we observe a broad enhancement
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In this paper we describe the studies of the main parameters needed for optimal operation of Visible Light Photon Counters (VLPCs) when used in quantum information systems. The isolation of the single photon signal is analyzed through the... more
In this paper we describe the studies of the main parameters needed for optimal operation of Visible Light Photon Counters (VLPCs) when used in quantum information systems. The isolation of the single photon signal is analyzed through the definition of a contamination parameter. A compromise in the minimization of this parameter for temperature, bias voltage and dark count variation must be achieved and this depends on the experimental conditions.
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We present measurements of light signals using visible light photon counters (VLPC), that indicate an increase in gain dispersion as the counting rate increases. We show that this dispersion can be understood on the basis of a recent... more
We present measurements of light signals using visible light photon counters (VLPC), that indicate an increase in gain dispersion as the counting rate increases. We show that this dispersion can be understood on the basis of a recent observation of localized field reduction in VLPCs at high input rates.
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PoS(Nufact08)043 For baselines of O(1000 km), the rich oscillation pattern at a Low-Energy Neutrino Factory (E ν = 0.5- ≈ 3 GeV) provides unique performance with regard to sensitivity to CP violation and the determination of the neutrino... more
PoS(Nufact08)043 For baselines of O(1000 km), the rich oscillation pattern at a Low-Energy Neutrino Factory (E ν = 0.5- ≈ 3 GeV) provides unique performance with regard to sensitivity to CP violation and the determination of the neutrino mass hierarchy [1]. A unique neutrino detector is needed, however, in order to exploit this oscillation pattern. The Totally Active Scintillator Detector (TASD) is particularly well suited for this facility. In this paper we give an update on the performance of TASD and discuss the detector R&D program. 10th International Workshop on Neutrino Factories, Super beams and Beta beams
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The Neutrino Factory and Muon Collider Collaboration and the Fermilab Muon Collider Task Force have recently submitted a proposal to the US Department of Energy Office of High Energy Physics to deliver a Design Feasibility Study for a... more
The Neutrino Factory and Muon Collider Collaboration and the Fermilab Muon Collider Task Force have recently submitted a proposal to the US Department of Energy Office of High Energy Physics to deliver a Design Feasibility Study for a Muon Collider after a 5 year R&D program. This paper presents a brief physics motivation for and the description of a Muon Collider facility and then discusses in some detail the technical components of the proposal with respect to the muon ionization cooling R&D needed for an Energy-Frontier, high luminosity
Muon-based accelerators have the potential to enable facilities at both the Intensity and the Energy Frontiers. Muon storage rings can serve as high precision neutrino sources, and a muon collider is an ideal technology for a TeV or... more
Muon-based accelerators have the potential to enable facilities at both the Intensity and the Energy Frontiers. Muon storage rings can serve as high precision neutrino sources, and a muon collider is an ideal technology for a TeV or multi-TeV collider. Progress in muon accelerator designs has advanced steadily in recent years. In regard to 6D muon cooling, detailed and realistic designs now exist that provide more than 5 order-of-magnitude emittance reduction. Furthermore, detector performance studies indicate that with suitable pixelation and timing resolution, backgrounds in the collider detectors can be significantly reduced thus enabling high quality physics results. Thanks to these and other advances in design & simulation of muon systems, technology development, and systems demonstrations, muon storage-ring-based neutrino sources and a muon collider appear more feasible than ever before. A muon collider is now arguably among the most compelling approaches to a multi-TeV lepton...
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This talk will present arguments that the Neutrino Factory — an extremely intense source of flavor-tagged neutrinos from muon decays in a storage ring — gives the best physics reach for CP violation, as well as virtually all parameters in... more
This talk will present arguments that the Neutrino Factory — an extremely intense source of flavor-tagged neutrinos from muon decays in a storage ring — gives the best physics reach for CP violation, as well as virtually all parameters in the neutrino oscillation parameter space. It will describe the physics capabilities of a baseline Neutrino Factory as compared to other possible future facilities (beta-beam and super-beam facilities), give an overview of the accelerator complex, describe the current international R&D program and present a potential time line for the design and construction of the facility. Although the baseline study focuses on a facility with muon energy of 25 GeV, a concept for a Low-Energy (~ 4 GeV) Neutrino Factory has been developed and its physics reach will also be discussed. Finally, it will be shown that a facility of this type is unique in that it can present a physics program that can be staged, addressing exciting new physics at each step. Eventually i...
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This paper reports on the progress of the design and construction of a retro-fitted return yoke for the international Muon Ionization Cooling Experiment (MICE). MICE is a proof-of-principle experiment aiming to demonstrate ionization... more
This paper reports on the progress of the design and construction of a retro-fitted return yoke for the international Muon Ionization Cooling Experiment (MICE). MICE is a proof-of-principle experiment aiming to demonstrate ionization cooling experimentally. In earlier studies we outlined how a partial return yoke can be used to mitigate stray magnetic field in the experimental hall; we report on the progress of the construction of the partial return yoke for MICE Step IV. We also discuss an extension of the Partial Return Yoke for the final step of MICE; we show simulation results of the expected performance.
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ABSTRACT
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Research Interests: Physics, Hydrogen, Heat Exchanger, Safety, Controls, and 3 moreLow Temperature, Liquid Nitrogen, and Absorbers
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Muon ionization cooling is the only practical method for preparing high-brilliance beams needed for a neutrino factory or muon collider. The muon ionization cooling experiment (MICE) under development at the Rutherford Appleton Laboratory... more
Muon ionization cooling is the only practical method for preparing high-brilliance beams needed for a neutrino factory or muon collider. The muon ionization cooling experiment (MICE) under development at the Rutherford Appleton Laboratory comprises a dedicated beamline to generate a range of input emittance and momentum, with time-of-flight and Cherenkov detectors to ensure a pure muon beam. A first measurement of emittance is performed in the upstream magnetic spectrometer with a scintillating-fiber tracker. A cooling cell will then follow, alternating energy loss in liquid hydrogen with RF acceleration. A second spectrometer identical to the first and a particle identification system will measure the outgoing emittance. Plans for measurements of emittance and cooling are described.