Publications
349 results found
Bogomilov M, Long KR, The MICE collaboration, 2017, Lattice design and expected performance of the Muon Ionization Cooling Experiment demonstration of ionization cooling, Physical Review Accelerators and Beams, Vol: 20, ISSN: 2469-9888
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.
Dobbs A, Hunt C, Long K, et al., 2016, The reconstruction software for the MICE scintillating fibre trackers, Journal of Instrumentation, Vol: 11, ISSN: 1748-0221
The Muon Ionization Cooling Experiment (MICE) will demonstrate the principle of muon beam phase-space reduction via ionization cooling. Muon beam cooling will be required for the proposed Neutrino Factory or Muon Collider. The phase-space before and after the cooling cell must be measured precisely. This is achieved using two scintillating-fibre trackers, each placed in a solenoidal magnetic field. This paper describes the software reconstruction for the fibre trackers: the GEANT4 based simulation; the implementation of the geometry; digitisation; space-point reconstruction; pattern recognition; and the final track fit based on a Kalman filter. The performance of the software is evaluated by means of Monte Carlo studies and the precision of the final track reconstruction is evaluated.
Edgecock TR, Caretta O, Davenne T, et al., 2016, Publisher’s Note: High intensity neutrino oscillation facilities in Europe [Phys. Rev. Accel. Beams 16, 021002 (2013)], Physical Review Accelerators and Beams, Vol: 19, ISSN: 2469-9888
Long K, 2016, The status of the construction of MICE Step IV, 37th International Conference on High Energy Physics (ICHEP), Publisher: Elsevier, Pages: 162-169, ISSN: 2405-6014
Muon beams of low emittance provide the basis for the intense, well-characterised neutrino beams necessary toelucidate the physics of flavour at the Neutrino Factory and to provide lepton-anti-lepton collisions at energies of upto several TeV at the Muon Collider. The International Muon Ionization Cooling Experiment (MICE) will demonstrateionization cooling; the technique by which it is proposed to reduce the phase-space volume occupied by the muonbeam at such facilities. In an ionization-cooling channel, the muon beam is caused to pass through a material (theabsorber) in which it looses energy, the energy lost is then replaced using RF cavities. The combined effect of energyloss and re-acceleration is to reduce the transverse emittance of the beam (transverse cooling).MICE is being constructed in a series of Steps. At Step IV, MICE will be able to study the properties of liquidhydrogen and lithium hydride that affect cooling. A solenoidal spectrometer will measure emittance upstream anddownstream of the absorber vessel. The muon beam will be focused at the absorber by a focusing coil. The construc-tion of Step IV at the Rutherford Appleton Laboratory is well advanced and is scheduled to be complete early in 2015.The status of the construction project will be described together with the performance of the principal components.Once the Step IV programme has been completed, the apparatus will be reconfigured to allow the MICE collaborationto demonstrate ionization cooling. This will require two single-cavity modules to be inserted one upstream and onedownstream of a central absorber. The status of the preparations for the MICE demonstration of ionization coolingwill also be described briefly.
Booth CN, Hodgson P, Langlands J, et al., 2016, The design and performance of an improved target for MICE, Journal of Instrumentation, Vol: 11, Pages: P05006-P05006, ISSN: 1748-0221
The linear motor driving the target for the Muon Ionisation Cooling Experiment hasbeen redesigned to improve its reliability and performance. A new coil-winding technique is de-scribed which produces better magnetic alignment and improves heat transport out of the windings.Improved field-mapping has allowed the more precise construction to be demonstrated, and anenhanced controller exploits the full features of the hardware, enabling increased acceleration andprecision. The new user interface is described and analysis of performance data to monitor frictionis shown to allow quality control of bearings and a measure of the ageing of targets during use.
Adams D, Alekou A, Apollonio M, et al., 2016, Pion contamination in the MICE muon beam, Journal of Instrumentation, Vol: 11, ISSN: 1748-0221
The international Muon Ionization Cooling Experiment (MICE) will perform a systematic investigation of ionization cooling with muon beams of momentum between 140 and 240 MeV/c at the Rutherford Appleton Laboratory ISIS facility. The measurement of ionization cooling in MICE relies on the selection of a pure sample of muons that traverse the experiment. To make this selection, the MICE Muon Beam is designed to deliver a beam of muons with less than ~1% contamination. To make the final muon selection, MICE employs a particle-identification (PID) system upstream and downstream of the cooling cell. The PID system includes time-of-flight hodoscopes, threshold-Cherenkov counters and calorimetry. The upper limit for the pion contamination measured in this paper is fπ < 1.4% at 90% C.L., including systematic uncertainties. Therefore, the MICE Muon Beam is able to meet the stringent pion-contamination requirements of the study of ionization cooling.
Adams D, Alekou A, Apollonio M, et al., 2015, Electron-muon ranger: performance in the MICE muon beam, Journal of Instrumentation, Vol: 10, ISSN: 1748-0221
Long K, 2015, ICFA Neutrino Panel Report, 26th International Conference on Neutrino Physics and Astrophysics (Neutrino), Publisher: AMER INST PHYSICS, ISSN: 0094-243X
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- Citations: 1
Bogomilov M, Matev R, Tsenov R, et al., 2014, Neutrino factory, PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS, Vol: 17, ISSN: 1098-4402
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- Citations: 11
Adey D, Agarwalla SK, Ankenbrandt CM, et al., 2014, Light sterile neutrino sensitivity at the nuSTORM facility, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 89, ISSN: 1550-7998
A facility that can deliver beams of electron and muon neutrinos from the decay of a stored muon beam has the potential to unambiguously resolve the issue of the evidence for light sterile neutrinos that arises in short-baseline neutrino oscillation experiments and from estimates of the effective number of neutrino flavors from fits to cosmological data. In this paper, we show that the nuSTORM facility, with stored muons of 3.8 GeV/c ± 10%, will be able to carry out a conclusive muon neutrino appearance search for sterile neutrinos and test the LSND and MiniBooNE experimental signals with 10σ sensitivity, even assuming conservative estimates for the systematic uncertainties. This experiment would add greatly to our knowledge of the contribution of light sterile neutrinos to the number of effective neutrino flavors from the abundance of primordial helium production and from constraints on neutrino energy density from the cosmic microwave background. The appearance search is complemented by a simultaneous muon neutrino disappearance analysis that will facilitate tests of various sterile neutrino models.
Derrick M, Krakauer D, Magill S, et al., 2014, Search for lepton flavor violation in ep collisions at 300 GeV center of mass energy, ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, Vol: 73, Pages: 613-628, ISSN: 0170-9739
Using the ZEUS detector at the HERA electronproton collider, we have searched for lepton flavor violation in ep collisions at a center—of—mass energy ($sqrt S$) of 300 GeV. Events of the type e + p → ℓ + X with a final—state lepton of high transverse momentum, ℓ = μ or τ, were sought. No evidence was found for lepton flavor violation in the combined 1993 and 1994 data samples, for which the integrated luminosities were 0.84 pb{−1}for e{∼p collisions and 2.94 pb{−1} for e+p collisions. Limits on coupling vs. mass are provided for leptoquarks and R—parity violating squarks. For flavor violating couplings of electromagnetic strength, we set 95% confidence level lower limits on leptoquark masses between 207 GeV and 272 GeV, depending on the leptoquark species and final—state lepton. For leptoquark masses larger than 300 GeV, limits on flavor—changing couplings are determined, many of which supersede prior limits from rare decay processes.
Abramowicz H, Abt I, Adamczyk L, et al., 2014, Measurement of D*<SUP>±</SUP> production in deep inelastic scattering at HERA (vol , 097, 2013), JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
Martyniak J, 2014, MICE data handling on the Grid, 20th International Conference on Computing in High Energy and Nuclear Physics (CHEP), Publisher: IOP PUBLISHING LTD, ISSN: 1742-6588
Dobbs A, Long K, Santos E, et al., 2014, The Reconstruction Software for the Muon Ionization Cooling Experiment Trackers, 20th International Conference on Computing in High Energy and Nuclear Physics (CHEP), Publisher: IOP PUBLISHING LTD, ISSN: 1742-6588
Adams D, Collaboration M, Adey D, et al., 2013, Characterisation of the muon beams for the Muon Ionisation Cooling Experiment, EUROPEAN PHYSICAL JOURNAL C, Vol: 73, ISSN: 1434-6044
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- Citations: 19
Abramowicz H, Abt I, Adamczyk L, et al., 2013, Measurement of charm fragmentation fractions in photoproduction at HERA, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
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- Citations: 37
Bravar U, Bogomilov M, Karadzhov Y, et al., 2013, MICE: the muon ionization cooling experiment. step I: first measurement of emittance with particle physics detectors, Proceedings, Meeting of the Division of the American Physical Society, DPF 2011, Publisher: arXiv, Pages: 1-9
The Muon Ionization Cooling Experiment (MICE) is a strategic R&D project intended to demonstrate the only practical solution to providing high brilliance beams necessary for a neutrino factory or muon collider. MICE is under development at the Rutherford Appleton Laboratory (RAL) in the United Kingdom. It comprises a dedicated beamline to generate a range of input muon emittances and momenta, with time-of-flight and Cherenkov detectors to ensure a pure muon beam. The emittance of the incoming beam will be measured in the upstream magnetic spectrometer with a scintillating fiber tracker. A cooling cell will then follow, alternating energy loss in Liquid Hydrogen (LH2) absorbers to RF cavity acceleration. A second spectrometer, identical to the first, and a second muon identification system will measure the outgoing emittance. In the 2010 run at RAL the muon beamline and most detectors were fully commissioned and a first measurement of the emittance of the muon beam with particle physics (time-of-flight) detectors was performed. The analysis of these data was recently completed and is discussed in this paper. Future steps for MICE, where beam emittance and emittance reduction (cooling) are to be measured with greater accuracy, are also presented.
Thomason JWG, Garoby R, Gilardoni S, et al., 2013, Proton driver scenarios at CERN and Rutherford Appleton Laboratory, PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS, Vol: 16, ISSN: 1098-4402
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- Citations: 6
Abramowicz H, Abt I, Adamczyk L, et al., 2013, Measurement of <i>D</i><SUP>±</SUP> production in deep inelastic <i>ep</i> scattering with the ZEUS detector at HERA, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
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- Citations: 9
Abramowicz H, Abt I, Adalllzyk L, et al., 2013, Measurement of D*<SUP>±</SUP> production in deep inelastic scattering at HERA, JOURNAL OF HIGH ENERGY PHYSICS, ISSN: 1029-8479
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- Citations: 9
Rogers CT, Stratakis D, Prior G, et al., 2013, Muon front end for the neutrino factory, PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS, Vol: 16, ISSN: 1098-4402
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- Citations: 16
Edgecock TR, Caretta O, Davenne T, et al., 2013, High intensity neutrino oscillation facilities in Europe, PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS, Vol: 16, ISSN: 1098-4402
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- Citations: 31
Abramowicz H, Abt I, Adamczyk L, et al., 2013, Combination and QCD analysis of charm production cross section measurements in deep-inelastic <i>ep</i> scattering at HERA, EUROPEAN PHYSICAL JOURNAL C, Vol: 73, ISSN: 1434-6044
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- Citations: 149
Abramowicz H, Abt I, Adamczyk L, et al., 2013, Production of the excited charm mesons <i>D</i><sub>1</sub> and <i>D</i><sub>2*</sub> at HERA, NUCLEAR PHYSICS B, Vol: 866, Pages: 229-254, ISSN: 0550-3213
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- Citations: 13
Abramowicz H, Abt I, Adamczyk L, et al., 2013, Production of Z<SUP>0</SUP> bosons in elastic and quasi-elastic <i>ep</i> collisions at HERA, PHYSICS LETTERS B, Vol: 718, Pages: 915-921, ISSN: 0370-2693
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- Citations: 6
Booth CN, Hodgson P, Howlett L, et al., 2013, The design, construction and performance of the MICE target, JINST, Vol: 8, Pages: P03006-P03006
Abramowicz H, Abt I, Adamczyk L, et al., 2012, Inclusive-jet photoproduction at HERA and determination of α<i><sub>s</sub></i>, NUCLEAR PHYSICS B, Vol: 864, Pages: 1-37, ISSN: 0550-3213
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- Citations: 35
Aaron FD, Abramowicz H, Abt I, et al., 2012, Combined inclusive diffractive cross sections measured with forward proton spectrometers in deep inelastic <i>ep</i> scattering at HERA, EUROPEAN PHYSICAL JOURNAL C, Vol: 72, ISSN: 1434-6044
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- Citations: 38
Abramowicz H, Abt I, Adamczyk L, et al., 2012, Measurement of isolated photons accompanied by jets in deep inelastic <i>ep</i> scattering, PHYSICS LETTERS B, Vol: 715, Pages: 88-97, ISSN: 0370-2693
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- Citations: 14
Long K, 2012, Steps towards the Neutrino Factory, 24th International Conference on Neutrino Physics and Astrophysics Neutrino, Publisher: ELSEVIER SCIENCE BV, Pages: 232-239, ISSN: 0920-5632
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