1,501 results on '"muon collider"'
Search Results
102. Detector Performances Studies at Muon Collider
- Author
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Nazar Bartosik, Lorenzo Sestini, Donatella Lucchesi, Nadia Pastrone, Massimo Casarsa, A. Ferrari, Nikolai Mokhov, Alessio Gianelle, Paola Sala, Francesco Collamati, Alessandro Bertolin, and Sergei Striganov
- Subjects
Physics ,Particle physics ,Luminosity (scattering theory) ,Muon ,Physics::Instrumentation and Detectors ,Order (ring theory) ,law.invention ,Muon collider ,law ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Detectors and Experimental Techniques ,Collider ,Realization (systems) ,Energy (signal processing) ,Lepton - Abstract
The Muon Collider is a possible option for the next generation of high energy collider machines. It would permit to achieve the energy frontier in lepton collisions, without occurring in significant synchrotron radiation losses as in electrons rings.Among the technological challenges in the realization of such a machine, the treatment of the beam-induced background is one of the most critical issues for the detectors.Beams with intensity of the order of $10^{12}$ muons per bunch are necessary to obtain the desired luminosity, therefore the muons decay rate is very high. Beam decay products and subsequent particles from secondary interactions with the machine elements can reach the interaction point, limiting the physical performance of the detector. A study of the beam-induced background is presented together with possible strategies for its reduction. Preliminary results on the reconstruction of a benchmark process, $\mu^+\mu^-\to H\nu\bar{\nu}\to b \bar{b}\nu\bar{\nu}$, including the beam-induced background are illustrated as demonstration of physics measurements feasibility in this harsh environment.
- Published
- 2020
103. Nanometric muon beam emittance from e^{+} annihilation on multiple thin targets
- Author
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A. Ciarma and O. R. Blanco-García
- Subjects
Nuclear and High Energy Physics ,low emittance ,Physics and Astronomy (miscellaneous) ,Physics::Instrumentation and Detectors ,Population ,01 natural sciences ,Radiation length ,Nuclear physics ,muon collider ,0103 physical sciences ,Thermal emittance ,lcsh:Nuclear and particle physics. Atomic energy. Radioactivity ,010306 general physics ,education ,Physics ,education.field_of_study ,Muon ,Annihilation ,010308 nuclear & particles physics ,Scattering ,Surfaces and Interfaces ,muon collider, muon production, low emittance ,Muon collider ,muon production ,Physics::Accelerator Physics ,lcsh:QC770-798 ,High Energy Physics::Experiment ,Beam emittance - Abstract
The production of a low emittance muon beam is interesting for muon collider projects. In such context we study the production of positive and negative muon beams at 22 GeV, from ${e}^{+}$ beam-vs-fixed target collisions, with a very small transverse and longitudinal emittance of $25\text{ }\text{ }\ensuremath{\pi}\text{ }\mathrm{nm}\text{ }\mathrm{rad}$ and $3\ifmmode\times\else\texttimes\fi{}1\text{ }\text{ }\ensuremath{\pi}\text{ }\mathrm{mm}\text{ }\mathrm{GeV}$, respectively. In order to cope with the small conversion efficiency of positrons into muon pairs and the divergence of the beams, we connect thin targets by a quadrupole-only transport line common to three beams (${\ensuremath{\mu}}^{+}$, ${\ensuremath{\mu}}^{\ensuremath{-}}$, and ${e}^{+}$) at two different energies ($\ensuremath{\mu}$ at 22 GeV and ${e}^{+}$ at 44 GeV), where the line is specially designed to match the muon beam phase space over $\ifmmode\pm\else\textpm\fi{}5%$ energy spread and to mitigate the effect of multiple scattering with the targets on all beams. The transport line allows us to use a larger fraction of target material, increasing the muon population by a factor of 10 per positron bunch and splitting the power deposition over 20 to 40 targets, while keeping the muon beam emittance equal or similar to one from a single thin target of 1% of a radiation length. It might be possible to integrate this line into an accumulator ring in order to increase the muon bunch population over hundreds of positron bunches.
- Published
- 2020
104. Muon Collider. A Path to the Future?
- Author
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Jean-Pierre Delahaye, Andrea Wulzer, Bruno Mansoulié, Daniel Schulte, Kenneth Long, Alexander Skrinsky, Lenny Rivkin, Nadia Patrone, and Marcella Diemoz
- Subjects
Physics ,Particle physics ,Muon ,Luminosity (scattering theory) ,Physics::Instrumentation and Detectors ,Collision ,Accelerators and Storage Rings ,law.invention ,Bunches ,law ,Muon collider ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Thermal emittance ,Collider ,Particle Physics - Experiment ,Lepton - Abstract
A muon collider would be both a precision and a powerful discovery machine, because it can offer collisions of point-like particles at very high energies, strongly exceeding the energy reach of other lepton colliders. It can even match the discovery of a proton collider with much higher energy, since the muon collision energy is fully available at constituent level unlike for the protons. However, the need for high luminosity faces technical challenges which arise from the short muon lifetime at rest and the difficulty of producing large numbers of muons in bunches with small emittance. Addressing these challenges requires the development of innovative concepts and demanding technologies. In view of the potential importance of muon colliders for the future of high-energy physics it is timely to start an R&D; programme now. A high-energy muon collider is receiving renewed attention as a possible frontier-exploration machine. Daniel Schulte, Nadia Pastrone and Ken Long describe the possible paths ahead.
- Published
- 2020
105. Emittance exchange in MICE
- Author
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Maurizio Bonesini
- Subjects
Physics ,Nuclear physics ,Transverse plane ,Muon collider ,Physics::Accelerator Physics ,Ionization cooling ,Thermal emittance ,Wedge (geometry) - Abstract
For a muon collider a 6D cooling is necessary. Emittance exchange using wedge absorbers may be employed for the required longitudinal ionization cooling. A polyethilene wedge has been manufactured and placed in MICE for such a scope. Data have been collected for both direct emittance exchange (longitudinal emittance decreases) and reverse emittance exchange (transverse emittance decreases). Simulation has shown the soundness of the method, while data analysis is in progress.
- Published
- 2020
106. Study of the production of a low emittance muon beam for the LEMMA project
- Author
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Ciarma, Andrea
- Subjects
Muon collider ,accelerator physics ,beam dynamics ,Monte Carlo ,simulations - Published
- 2020
107. Measuring the quartic Higgs self-coupling at a multi-TeV muon collider
- Author
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Luca Mantani, Barbara Mele, Mauro Chiesa, Xiaoran Zhao, Fulvio Piccinini, Fabio Maltoni, UCL - SST/IRMP - Institut de recherche en mathématique et physique, Laboratoire d'Annecy-le-Vieux de Physique Théorique (LAPTH), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Chiesa M., Maltoni F., Mantani L., Mele B., Piccinini F., and Zhao X.
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Nuclear and High Energy Physics ,Particle physics ,Higgs Physics ,Physics::Instrumentation and Detectors ,FOS: Physical sciences ,01 natural sciences ,law.invention ,High Energy Physics - Experiment ,High Energy Physics - Experiment (hep-ex) ,High Energy Physics - Phenomenology (hep-ph) ,muon+ muon ,law ,Quartic function ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,lcsh:Nuclear and particle physics. Atomic energy. Radioactivity ,010306 general physics ,Collider ,Higgs particle: multiple production ,Effective Field Theorie ,Physics ,Coupling ,Higgs particle: coupling ,010308 nuclear & particles physics ,High Energy Physics::Phenomenology ,Effective Field Theories ,coupling: Higgs ,High Energy Physics - Phenomenology ,Muon collider ,[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] ,Beyond Standard Model ,Higgs boson ,lcsh:QC770-798 ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Center of mass ,linear collider ,potential: Higgs ,muon+ muon-: scattering - Abstract
Measuring the shape of the Higgs boson potential is of paramount importance and will be a challenging task at current as well as future colliders. While the expectations for the measurement of the trilinear Higgs self-coupling are rather promising, an accurate measurement of the quartic self-coupling interaction is presently considered extremely challenging even at a future 100 TeV proton-proton collider. In this work we explore the sensitivity that a muon collider with a center of mass energy in the multi-TeV range, and luminosities of the order of 10^35cm^-2s^-1, as presently under discussion, might provide thanks to a rather large three Higgs-boson production and to a limited background. By performing a first and simple analysis, we find a clear indication that a muon collider could provide a determination of the quartic Higgs self-coupling that is significantly better than what is currently considered attainable at other future colliders., Table 3 and figs.14-18 added. Matches version published on JHEP
- Published
- 2020
108. Muon production and accumulation from positrons on target
- Author
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Mario Antonelli, Manuela Boscolo, A. Ciarma, Pantaleo Raimondi, and European Synchrotron Radiation Facility (ESRF)
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Nuclear and High Energy Physics ,low emittance ,beam dynamics ,Physics and Astronomy (miscellaneous) ,muon collider, low emittance, muon production ,Physics::Instrumentation and Detectors ,[PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph] ,Population ,01 natural sciences ,chromaticity: correction ,Nuclear physics ,muon collider ,Positron ,High-Energy Accelerators and Colliders ,0103 physical sciences ,Thermal emittance ,lcsh:Nuclear and particle physics. Atomic energy. Radioactivity ,muon: particle source ,High order ,010306 general physics ,education ,Physics ,education.field_of_study ,Muon ,010308 nuclear & particles physics ,Scattering ,muon: beam ,scattering ,Surfaces and Interfaces ,accumulator ,Accumulator (energy) ,beam emittance ,beam optics ,quality ,lcsh:QC770-798 ,muon production ,Physics::Accelerator Physics ,positron ,High Energy Physics::Experiment ,target: design ,Beam emittance ,acceptance - Abstract
International audience; In this paper we investigate the production of a muon beam by positrons on target. We describe the characteristics of the muon beam as produced by different target configurations. We present an optics for the muon accumulator ring, discussing how it fulfils the large energy acceptance requirement and the high order chromaticity correction at the target, as well as other parameters relevant to enhance the muon bunch quality. We discuss the muon beam dynamics through the ring for the configuration of the single-pass LEMMA scheme, and the optimization study performed with the goals of maximizing the muon bunch population and minimizing its emittance.
- Published
- 2020
109. The ESSnuSB project
- Author
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Budimir Klicek
- Subjects
Physics ,Muon ,Physics::Instrumentation and Detectors ,High Energy Physics::Phenomenology ,neutrino ,CP violation ,7. Clean energy ,Nuclear physics ,Neutrino detector ,13. Climate action ,Muon collider ,Physics::Accelerator Physics ,Neutron ,Neutrino Factory ,High Energy Physics::Experiment ,Neutrino ,Spallation Neutron Source - Abstract
Considering the relatively large value of the last measured neutrino mixing angle $\theta_{; ; ; 13}; ; ; $, the way is now open to observe for the first time a possible CP violation in the leptonic sector. The measured value of $\theta_{; ; ; 13}; ; ; $ also privileges the \nth{; ; ; 2}; ; ; oscillation maximum for the discovery of CP violation instead of the usually used \nth{; ; ; 1}; ; ; oscillation maximum. The sensitivity to the CP violation signal at this \nth{; ; ; 2}; ; ; oscillation maximum is significantly higher than at the \nth{; ; ; 1}; ; ; oscillation maximum thereby making the measurement significantly less sensitive to the systematic errors. Going to the \nth{; ; ; 2}; ; ; oscillation maximum necessitates a very intense neutrino beam with the appropriate energy. The world’s most intense pulsed spallation neutron source, the European Spallation Source, will have a proton linac with the unprecedented power of 5 MW and 2 GeV energy. This linac, currently under construction, also has the potential to become the proton driver of the world’s most intense neutrino beam with high potential to discover and well measure a neutrino CP violation. The physics performance of that neutrino Super Beam in conjunction with a megaton underground Water Cherenkov neutrino detector installed at a distance of about \SI{; ; ; 500}; ; ; {; ; ; km}; ; ; from ESS has been evaluated. In addition, the choice of such detector will extend the physics program to proton–decay, atmospheric neutrinos and astrophysics searches. The ESS proton linac upgrades, the accumulator ring needed for proton pulse compression, the target station optimization, and the physics potential are described. In addition to neutrinos, this facility will also produce at the same time a copious number of muons which could be used by a low energy nuSTORM facility, a Neutrino Factory or/and a muon collider. The ESS neutron facility will be ready by 2025 at which moment the upgrades for the neutrino facility could start.
- Published
- 2020
- Full Text
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110. Detector and Physics Performance at a Muon Collider
- Author
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N. Bartosik, A. Bertolin, L. Buonincontri, M. Casarsa, F. Collamati, A. Ferrari, A. Gianelle, D. Lucchesi, N. Mokhov, M. Palmer, N. Pastrone, P. Sala, L. Sestini, and S. Striganov
- Subjects
Physics ,Muon ,hep-ex ,Physics::Instrumentation and Detectors ,High Energy Physics::Phenomenology ,Bremsstrahlung ,FOS: Physical sciences ,Synchrotron radiation ,Elementary particle ,Fermion ,High Energy Physics - Experiment ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,Muon collider ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Instrumentation ,Particle Physics - Experiment ,Mathematical Physics ,Lepton ,Boson - Abstract
A muon collider represents the ideal machine to reach very high center-of-mass energies and luminosities by colliding elementary particles. This is the result of the low level of beamstrahlung and synchrotron radiation compared to linear or circular electron-positron colliders. In contrast with other lepton machines, the design of a detector for a multi-TeV muon collider requires detailed knowledge of the interaction region due to the significant backgrounds created by muon beam decays in the collider ring. The physics reach can be properly evaluated only when the detector performance in such an environment is determined. In this work, the backgrounds generated by muon beams of 750 GeV are characterized and the performance of the tracking system and the calorimeter detector is illustrated. Solutions to minimize the effect of the beam-induced backgrounds are discussed and applied to obtain track and jet reconstruction performance. The μ+μ−→ Hν&barnu;→ b&barb; ν&barnu; process is fully simulated and reconstructed to demonstrate that physics measurements are possible in this harsh environment. The measurement precision for the Higgs boson coupling to b&barb; is evaluated for &surd;s=1.5, 3, and 10 TeV and compared to other proposed machines. A muon collider represents the ideal machine to reach very high center-of-mass energies and luminosities by colliding elementary particles. This is the result of the low level of beamstrahlung and synchrotron radiation compared to linear or circular electron-positron colliders. In contrast with other lepton machines, the design of a detector for a multi-TeV muon collider requires the knowledge of the interaction region due to the presence of a large amount of background induced by muon beam decays. The physics reaches can be properly evaluated only when the detector performance is determined. In this work, the background generated by muon beams of $750$ GeV is characterized and the performance of the tracking system and the calorimeter detector are illustrated. Solutions to minimize the effect of the beam-induced background are discussed and applied to obtain track and jet reconstruction performance. The $\mu^+\mu^-\to H\nu\bar{\nu}\to b\bar b \nu\bar{\nu}$ process is fully simulated and reconstructed to demonstrate that physics measurements are possible in this harsh environment. The precision on Higgs boson coupling to $b\bar b$ is evaluated for $\sqrt{s}=1.5$, 3, and 10 TeV and compared to other proposed machines.
- Published
- 2020
111. Vector boson fusion at multi-TeV muon colliders
- Author
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Fabio Maltoni, Antonio Costantini, Olivier Mattelaer, Federico De Lillo, Xiaoran Zhao, Richard Ruiz, Luca Mantani, Costantini, Antonio, De Lillo, Federico, Maltoni, Fabio, Mantani, Luca, Mattelaer, Olivier, Ruiz, Richard, and Zhao, Xiaoran
- Subjects
Nuclear and High Energy Physics ,Particle physics ,Higgs Physics ,Physics beyond the Standard Model ,FOS: Physical sciences ,01 natural sciences ,7. Clean energy ,Standard Model ,law.invention ,Vector boson ,High Energy Physics - Experiment ,High Energy Physics - Experiment (hep-ex) ,Beyond Standard Model, Effective Field Theories, Higgs Physics ,High Energy Physics - Phenomenology (hep-ph) ,law ,0103 physical sciences ,lcsh:Nuclear and particle physics. Atomic energy. Radioactivity ,010306 general physics ,Collider ,Physics ,010308 nuclear & particles physics ,Electroweak interaction ,High Energy Physics::Phenomenology ,Effective Field Theories ,High Energy Physics - Phenomenology ,Muon collider ,Beyond Standard Model ,Higgs boson ,lcsh:QC770-798 ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Lepton - Abstract
High-energy lepton colliders with a centre-of-mass energy in the multi-TeV range are currently considered among the most challenging and far-reaching future accelerator projects. Studies performed so far have mostly focused on the reach for new phenomena in lepton-antilepton annihilation channels. In this work we observe that starting from collider energies of a few TeV, electroweak (EW) vector boson fusion/scattering (VBF) at lepton colliders becomes the dominant production mode for all Standard Model processes relevant to studying the EW sector. In many cases we find that this also holds for new physics. We quantify the size and the growth of VBF cross sections with collider energy for a number of SM and new physics processes. By considering luminosity scenarios achievable at a muon collider, we conclude that such a machine would effectively be a "high-luminosity weak boson collider," and subsequently offer a wide range of opportunities to precisely measure EW and Higgs coupling as well as to discover new particles., Comment: 58 pages, 17 figures, 9 tables. A contribution to Snowmass 2021
- Published
- 2020
- Full Text
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112. High Energy Leptonic Collisions and Electroweak Parton Distribution Functions
- Author
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Yang Ma, Tao Han, and Keping Xie
- Subjects
Physics ,Gauge boson ,Particle physics ,Physics::Instrumentation and Detectors ,Electroweak interaction ,High Energy Physics::Phenomenology ,FOS: Physical sciences ,Parton ,High Energy Physics - Experiment ,High Energy Physics - Phenomenology ,High Energy Physics - Experiment (hep-ex) ,Distribution function ,High Energy Physics - Phenomenology (hep-ph) ,Gauge group ,Muon collider ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Electroweak scale ,Lepton - Abstract
In high-energy leptonic collisions well above the electroweak scale, the collinear splitting mechanism of the electroweak gauge bosons becomes the dominant phenomena via the initial state radiation and the final state showering. We point out that at future high-energy lepton colliders, such as a multi-TeV muon collider, the electroweak parton distribution functions (EW PDFs) should be adopted as the proper description for partonic collisions of the initial states. The leptons and electroweak gauge bosons are the EW partons, that evolve according to the unbroken Standard Model (SM) gauge group and that effectively resum potentially large collinear logarithms. We present a formalism for the EW PDFs at the Next-to-Leading-Log (NLL) accuracy. We calculate semi-inclusive cross sections for some important SM processes at a future multi-TeV muon collider. We conclude that it is appropriate to adopt the EW PDF formalism for future high-energy lepton colliders., Comment: Replace one plot to correct a typo in label
- Published
- 2020
- Full Text
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113. WIMPs at High Energy Muon Colliders
- Author
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Lian-Tao Wang, Zhen Liu, Xing Wang, and Tao Han
- Subjects
Physics ,Particle physics ,Muon ,010308 nuclear & particles physics ,Physics::Instrumentation and Detectors ,Dark matter ,Electroweak interaction ,High Energy Physics::Phenomenology ,Massive particle ,FOS: Physical sciences ,01 natural sciences ,law.invention ,Vector boson ,High Energy Physics - Experiment ,High Energy Physics - Phenomenology ,High Energy Physics - Experiment (hep-ex) ,High Energy Physics - Phenomenology (hep-ph) ,WIMP ,Muon collider ,law ,0103 physical sciences ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,010306 general physics ,Collider - Abstract
The Weakly Interacting Massive Particle (WIMP) paradigm is one of the most compelling scenarios for particle dark matter (DM). We show in this paper that a high energy muon collider can make decisive statements about the WIMP DM, and this should serve as one of its main physics driver cases. We demonstrate this by employing the DM as the lightest member of an electroweak (EW) multiplet, which is a simple, yet one of the most challenging WIMP scenarios given its minimal collider signature and high thermal target mass scale of 1 TeV$-$23 TeV. We perform a first study of the reach of high energy muon colliders, focusing on the simple, inclusive and conservative signals with large missing mass, through the mono-photon, VBF di-muon and a novel mono-muon channel. Using these inclusive signals, it is possible to cover the thermal targets of doublet and triplet with a 10 TeV muon collider. Higher energies, 14 TeV$-$75 TeV, would ensure a $5 \sigma$ reach above the thermal targets for the higher EW multiplets. We also estimate the reach of a search for disappearing tracks, demonstrating the potential significant enhancement of the sensitivity., Comment: v1: 33 pages, 16 figures, 3 tables; v2: minor updates, matches PRD published version; v3: doublet disappearing track numerical results corrected, conclusions improves; also matches PRD errata
- Published
- 2020
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114. Accelerator Backgrounds in a Muon Collider.
- Author
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Cummings, Mary Anne and Kahn, Stephen
- Subjects
PARTICLE accelerators ,COLLIDERS (Nuclear physics) ,MUONS ,SYNCHROTRON radiation ,HIGGS bosons ,COLLISIONS (Nuclear physics) - Abstract
Abstract: Muon colliders are considered to be an important future energy frontier accelerator. It is possible to build a large muon collider as a circular machine, even at multi-TeV energies, due to the greatly reduced synchrotron radiation expected from muons. In addition to the same physics processes present in an electron collider, a muon collider will have the potential to produce s-channel resonances such as the various Higgs states at an enhanced rate. For a muon collider with 750GeV/c μ+μ− with 2×10
12 muons per bunch we would expect 8.6×105 muon decays per meter for the two beams. The energetic electrons from muon decays will produce detector backgrounds that can affect the physics. These backgrounds include electrons from muon decays, synchrotron radiation from the decay electrons, hadrons produced by photo-nuclear interactions, coherent and incoherent beam-beam pair production and Bethe-Heitler muon production. In this paper we will discuss these processes and calculate particle fluxes into the detector volume from these background processes. [Copyright &y& Elsevier]- Published
- 2012
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115. Detector Backgrounds at Muon Colliders.
- Author
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Mokhov, N.V. and Striganov, S.I.
- Subjects
NUCLEAR counters ,MUONS ,COLLISIONS (Nuclear physics) ,SELF-consistent field theory ,SUPERCONDUCTING magnets - Abstract
Abstract: The physics goals of a Muon Collider (MC) can only be achieved with appropriate, self-consistent designs of the ring, interaction region (IR), high-field superconducting magnets, machine-detector interface (MDI) and detector. Recent results from realistically-implemented simulation studies are presented here for a 1.5-TeV MC. It is shown that if the IR and MDI are designed with appropriate shielding, background rates are significantly suppressed in the MC detector. The main characteristics of these backgrounds are also presented. [Copyright &y& Elsevier]
- Published
- 2012
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116. 6D μ± cooling using a solenoid-dipole ring cooler for a muon collider
- Author
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Garren, Al, Berg, J.S., Cline, D., Ding, X., and Kirk, H.G.
- Subjects
- *
SOLENOIDS , *COOLING , *MAGNETIC dipoles , *MUONS , *COLLIDERS (Nuclear physics) , *BEAM dynamics , *LATTICE dynamics - Abstract
Abstract: Six dimensional cooling of large emittance μ+ and μ− beams is required in order to obtain the desired luminosity for a muon collider. We propose to use a ring cooler that employs both dipoles and solenoids with the additional requirement that the arcs of the ring be achromatic. We describe the lattice and the beam dynamics of the proposed ring, and demonstrate that the lattice gives substantial cooling in all 6 phase space dimensions. [Copyright &y& Elsevier]
- Published
- 2011
- Full Text
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117. Critical Currents of YBa2Cu3O7-\delta Tapes and Bi2Sr2CaCu2Ox Wires at Different Temperatures and Magnetic Fields.
- Author
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Lombardo, V., Barzi, E., Turrioni, D., and Zlobin, A. V.
- Subjects
- *
HIGH temperature superconductors , *CRITICAL currents , *BARIUM compounds , *BISMUTH compounds , *MAGNETIC fields , *WIRE , *SOLENOIDS , *SUPERCONDUCTING magnets , *DENSITY currents - Abstract
Design studies for the cooling channel of a Muon Collider show the need for straight and helical solenoids generating fields well in excess of the critical fields of state-of-the-art Low Temperature Superconductors (LTS), such as Nb3Sn or NbTi. Therefore, High Temperature Superconductors (HTS) may be used for the manufacturing of all or certain sections of these magnets to generate and support the field levels required at the operating temperature of the new machine. In this work, two High Temperature Superconductors—Bi-2212 round wires and YBCO coated conductor (CC) tapes—are investigated to understand how their critical current density scales as a function of magnetic field and operating temperature. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
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118. High Field HTS R&D Solenoid for Muon Collider.
- Author
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Gupta, Ramesh, Anerella, Mike, Ganetis, George, Ghosh, Arup, Kirk, Harold, Palmer, Robert, Plate, Steve, Sampson, William, Shiroyanagi, Yuko, Wanderer, Peter, Brandt, Bruce, Cline, David, Garren, Alper, Kolonko, Jim, Scanlan, Ronald, and Weggel, Robert
- Subjects
- *
HIGH temperature superconductors , *SOLENOIDS , *MUONS , *COLLIDERS (Nuclear physics) , *STRAINS & stresses (Mechanics) , *MAGNETIC fields , *ELECTRIC currents , *MECHANICAL behavior of materials - Abstract
This paper presents the goal and status of the high field High Temperature Superconductor (HTS) solenoid program funded through a series of SBIRs. The target of this R&D program is to build HTS coils that are capable of producing fields greater than 20 T when tested alone and approaching 40 T when tested in a background field magnet. The solenoid will be made with second generation (2G) high engineering current density HTS tape. To date, 17 HTS pancake coils have been built and tested in the temperature range from 20 K to 80 K. Quench protection, high stresses and minimization of degradation of conductor are some of the major challenges associated with this program. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
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119. Conceptual Designs of Dipole Magnet for Muon Collider Storage Ring.
- Author
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Novitski, I., Kashikhin, V. V., Mokhov, N., and Zlobin, A. V.
- Subjects
- *
MAGNETIC dipoles , *MUONS , *COLLIDERS (Nuclear physics) , *STORAGE rings , *SUPERCONDUCTING magnets , *MECHANICAL behavior of materials , *PARTICLE accelerators , *ELECTRON beams - Abstract
Conceptual designs of a superconducting dipole magnet for a storage ring of a muon collider with a 1.5 TeV center of mass (c.o.m.) energy and an average luminosity of 10^34\ cm^-2s^-1 are presented. In contrast to proton machines, the dipoles for the muon collider should be able to handle \sim0.5 kW/m of dynamic heat load from the muon beam decays. The magnets are based on Nb3Sn superconductor and designed to provide an operating field of 10 T in the 20-mm aperture with the critical current margin required for reliable machine operation. The magnet cross-sections were optimized to achieve the best possible field quality in the aperture occupied by beams. The developed mechanical structures provide adequate coil prestress and support at the maximum level of Lorentz forces in the coil. Magnet parameters are reported and compared with the requirements. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
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120. Effects of external magnetic fields on the operation of high-gradient accelerating structures
- Author
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Stratakis, Diktys, Gallardo, Juan C., and Palmer, Robert B.
- Subjects
- *
MAGNETIC fields , *ELECTRON accelerators , *THERMAL stresses , *RADIO frequency , *SCALING laws (Nuclear physics) , *NUCLEAR physics - Abstract
Abstract: Field emission in an rf cavity in the presence of external magnetic fields is examined. We show that emitted electrons from a sharp protrusion are focused by the magnetic field into small spots at another location in the cavity where they heat its surface. Scaling laws are established for the beam’s induced heat in terms of macroscopic quantities such as magnetic field, accelerating gradient and spot dimensions. We find that when the magnetic field is of the order of a Tesla, the induced thermal stresses by the pulsed electron flux exceed the elastic limit and the surface becomes prone to cycling fatigue. The implication of these findings on the observed surface damage and magnetic-field-depended breakdown of an 805MHz cavity is addressed. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
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121. Squark Pair Production at Muon Colliders in the MSSM with CP Violation.
- Author
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Nguyen Thi Thu Huong, Nguyen Chinh Cuong, Ha Huy Bang, and Dao Thi Le Thuy
- Subjects
- *
MUONS , *PARTICLES (Nuclear physics) , *COLLIDERS (Nuclear physics) , *NUCLEAR physics , *PARTICLE accelerators - Abstract
We study the pair production of scalar quark in a muon collider within the MSSM with CP violation. We show that including the CP phases can strongly affect the cross section of the process: $\mu^{+}\mu^{-}\rightarrow \tilde{q}_{i}\bar{\tilde{q}}_{j}$. This could have an important impact on the search for squarks and the determination of the MSSM parameters at future colliders. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF
122. Modular Test Facility for HTS Insert Coils.
- Author
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Lombardo, V., Bartalesi, A., Barzi, E., Lamm, M., Turrioni, D., and Zlobin, A. V.
- Subjects
- *
HIGH temperature superconductors , *MAGNETIC circuits , *SOLENOIDS , *MAGNETIC fields , *NITROGEN , *HELIUM - Abstract
The final beam cooling stages of a Muon Collider may require DC solenoid magnets with magnetic fields in the range of 40-50 T. In this paper we will present a modular test facility developed to investigate very high fields using double pancake coils made of commercially available 2G HTS materials. The conductor performance is presented, together with magnetic calculations and an evaluation of Lorentz forces distribution in the coils when inserted in an outer solenoid. Finally, results from tests in nitrogen and helium of a double pancake coil are presented up to an external magnetic field of 14 T. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
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123. Conceptual design and the simulation of final cooling section for a muon collider
- Author
-
Skrinsky, A.N. and Zolkin, T.V.
- Subjects
- *
COLLIDERS (Nuclear physics) , *MUONS , *COOLING , *LITHIUM , *COMPUTER simulation , *FLUCTUATIONS (Physics) , *IONIZATION (Atomic physics) , *PHASE space , *ENERGY dissipation - Abstract
Abstract: The scheme of final cooling for muon beams, based on using current-carrying liquid-lithium rods, is discussed. The dynamics of particles in the course of cooling taking into account the non-paraxial motion has been studied with the help of computer simulation. It is suggested to minimize the effective increase of the longitudinal emittance caused by fluctuations of ionization losses and large angular spread, by the rotation of the longitudinal phase-space portrait for arranging self-action. We have considered the non-dissipative multiple successive full emittance redistribution from the longitudinal dimension to transverse one, necessary for cooling of all degrees of freedom. This redistribution is based on special rotations of the particle six-dimensional phase space by the beam division in several streams and their consequent merging with the minimum increment of full emittance and minimal beam losses taking into account their local phase-space density. Some of the basic technical parameters of the cooling system elements have been estimated. [Copyright &y& Elsevier]
- Published
- 2009
- Full Text
- View/download PDF
124. Muon detection in electron-positron annihilation for muon collider studies.
- Author
-
Amapane, N., Antonelli, M., Anulli, F., Ballerini, G., Bandiera, L., Bartosik, N., Bauce, M., Bertolin, A., Biino, C., Blanco-García, O.R., Boscolo, M., Brizzolari, C., Cappati, A., Casaburo, F., Casarsa, M., Cavoto, G., Cesarini, G., Collamati, F., Cotto, G., and Curatolo, C.
- Subjects
- *
MUONS , *FORCE & energy , *CHERENKOV counters , *NUCLEAR research , *COLLISIONS (Nuclear physics) - Abstract
The investigation of the energy frontier in physics requires novel concepts for future colliders. The idea of a muon collider is very appealing since it would allow to study particle collisions at up to tens of TeV energy, while offering a cleaner experimental environment with respect to hadronic colliders. One key element in the muon collider design is the low-emittance muon production. Recently, the Low EMittance Muon Accelerator (LEMMA) collaboration has explored the muon pair production close to its kinematic threshold by annihilating 45 GeV positrons with electrons in a low Z material target. In this configuration, muons are emerging from the target with a naturally low-emittance. In this paper we describe the performance of a system, to study this production mechanism, that consists in several segmented absorbers with alternating active layers composed of fast Cherenkov detectors together with a muon identification technique based on this detector. Passive layers were made of tungsten. We collected data corresponding to muon and electron beams produced at the H2 line in the North Area of the European Organization for Nuclear Research (CERN) in September 2018. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
125. RECENT PROGRESS ON THE 6D COOLING SIMULATIONS IN THE GUGGENHEIM CHANNEL.
- Author
-
Snopok, Pavel, Hanson, Gail, and Klier, Amit
- Subjects
- *
MUONS , *COLLIDERS (Nuclear physics) , *LATTICE theory , *IONIZATION (Atomic physics) , *COOLING , *NUCLEAR physics - Abstract
The RFOFO ring is considered to be one of the most promising six-dimensional cooling channels proposed for the future muon collider. It has a number of advantages over other cooling channels, but it also has certain drawbacks. The injection and extraction issue as well as the absorber overheating are its main problems. In this article the simulations of a possible solution to these problems, the RFOFO helix, commonly referred to as the Guggenheim channel, are studied in detail. The details of the tracking studies of both the idealized and realistic lattices are presented and compared to the performance of the underlying RFOFO cooling ring design. [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
- View/download PDF
126. COLLIDING NEUTRINO BEAMS.
- Author
-
SCHWIENHORST, REINHARD
- Subjects
- *
PHYSICS research , *NEUTRINO mass , *MUONS , *BOSONS , *PARTICLES (Nuclear physics) - Abstract
From several neutrino oscillation experiments, we understand now that neutrinos have mass. However, we really do not know what mechanism is responsible for producing this neutrino mass. Current or planned neutrino experiments utilize neutrino beams and long-baseline detectors to explore flavor mixing but do not address the question of the origin of neutrino mass. In order to begin answering that question, neutrino interactions need to be explored at much higher energies. This paper outlines a program to explore neutrinos and their interactions with various particles through a series of experiments involving colliding neutrino beams. [ABSTRACT FROM AUTHOR]
- Published
- 2008
- Full Text
- View/download PDF
127. Study of High Field Superconducting Solenoids for Muon Beam Cooling.
- Author
-
Kashikhin, V. V., Barzi, E., Kashikhin, V. S., Lamm, M., Sadovskiy, Y., and Ziobin, A. V.
- Subjects
- *
SUPERCONDUCTING magnets , *SUPERCONDUCTING composites , *SUPERCONDUCTORS , *SOLENOIDS , *MAGNETIC fields , *FIELD theory (Physics) , *SOLID state electronics , *MAGNETIC circuits , *MAGNETIC devices - Abstract
The final beam cooling stages of a possible Muon Collider may require DC solenoid magnets with magnetic fields of 40-50 T in an aperture of 40-50 mm. In this paper, we study possible solutions towards creating DC fields of that order using available superconductors. Several magnetic and mechanical designs, optimized for the maximum performance are presented and compared in terms of cost and size. [ABSTRACT FROM AUTHOR]
- Published
- 2008
- Full Text
- View/download PDF
128. Phase space analysis of secondary beams generated in hadron–photon collisions
- Author
-
Luca Serafini, F. Broggi, and C. Curatolo
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Photon ,Large Hadron Collider ,010308 nuclear & particles physics ,Nuclear Theory ,Hadron ,01 natural sciences ,Future Circular Collider ,Nuclear physics ,Pion ,Muon collider ,0103 physical sciences ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Thermal emittance ,Nuclear Experiment ,Instrumentation ,Event generator - Abstract
Present availability of high brilliance photon beams in combination with intense TeV hadron beams makes it possible to conceive the generation of low emittance TeV-class energy pion/muon beams via photoproduction in a highly relativistic Lorentz boosted frame. We analyze the secondary beams brightness achievable by the coupling of advanced high efficiency high repetition rate FEL pulses and Large Hadron Collider or Future Circular Collider hadron beams. The phase space distributions of the pion and muon beams are obtained by means of an event generator code and the characteristics, such as emittance and energy spread, are benchmarked against analytical expressions.
- Published
- 2017
129. The Muon g − 2 experiment at Fermilab
- Author
-
J. Mott
- Subjects
Physics ,Larmor precession ,Nuclear and High Energy Physics ,Particle physics ,Muon ,Anomalous magnetic dipole moment ,Physics::Instrumentation and Detectors ,010308 nuclear & particles physics ,Detector ,Muon spin spectroscopy ,01 natural sciences ,Nuclear physics ,Muon collider ,0103 physical sciences ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Fermilab ,010306 general physics ,Storage ring - Abstract
The Muon g−2 experiment at Fermilab will measure the anomalous magnetic moment of the muon to a precision of 140 ppb, reducing the experimental uncertainty by a factor of 4 compared to the previous measurement at BNL (E821). The measurement technique adopts the storage ring concept used for E821, with magic-momentum muons stored in a highly uniform 1.45 T magnetic dipole field. The spin precession frequency is extracted from an analysis of the modulation of the rate of higher-energy positrons from muon decays, detected by 24 calorimeters and 3 straw tracking detectors. Compared to the E821 experiment, muon beam preparation, storage ring internal hardware, field measuring equipment, and detector and electronics systems are all new or significantly upgraded. Herein, I report on the status of the experiment as of Sept. 2016, presenting the magnetic field uniformity results after the completion of the first round of shimming and outlining the construction progress of the main detector systems.
- Published
- 2017
130. Calculating vertical atmospheric muon energy spectra for energies ranging from 102 to 105 GeV
- Author
-
T. M. Roganova, L. G. Dedenko, G. F. Fedorova, and A. V. Lukyashin
- Subjects
Physics ,Range (particle radiation) ,Particle physics ,Muon ,COSMIC cancer database ,Meson ,010308 nuclear & particles physics ,Astrophysics::High Energy Astrophysical Phenomena ,Hadron ,General Physics and Astronomy ,01 natural sciences ,Spectral line ,Nuclear physics ,Muon collider ,0103 physical sciences ,High Energy Physics::Experiment ,010306 general physics ,Intensity (heat transfer) - Abstract
New calculations of the atmospheric vertical muon energy spectra for energies ranging from 102 to 105 GeV are performed using an original approach and the CORSIKA 7.4 software package. The intensity of the atmospheric muon flux calculated using the SIBYLL 2.1 and QGSJET II-03 models for muon energies of ~(103–105) GeV is 1.7 times lower than the intensity predicted by L3+Cosmic, MARO and LVD collaborations on the basis of experimental data. For the energy range of ~(102–103) GeV, this reduction is as high as ~2.2 for the QGSJET II-03 model; for the SIBYLL 2.1 model, it falls to 2.1. If we assume that the first generation of charged π± and K ± mesons makes the greatest contribution to the most energetic muon flux, the generation of mesons is underestimated by 1.7 times in the abovementioned models.
- Published
- 2017
131. A neutron field monitoring system for collider experiments
- Author
-
Andrey Gribushin, A. A. Ershov, V. A. Pikalov, V. S. Lukanin, A. I. Demianov, and A. A. Kaminskiy
- Subjects
Physics ,Large Hadron Collider ,Luminosity (scattering theory) ,Physics::Instrumentation and Detectors ,020209 energy ,02 engineering and technology ,Radiation ,01 natural sciences ,Field monitoring ,law.invention ,Nuclear physics ,Muon collider ,law ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Neutron ,010306 general physics ,Collider ,Instrumentation ,Compact Muon Solenoid - Abstract
A monitoring system for intense (up to 105 neutrons/(cm2 s)) neutron fluxes with energies as high as 15 MeV has been developed for long-term operation in strong magnetic and radiation fields of collider experiments. The system is used to monitor the radiation shielding efficiency, estimate the radiation degradation of active elements of experimental setups, and perform additional independent monitoring of the accelerator luminosity. The system has been tested and put into operation at the Compact Muon Solenoid (CMS) experimental setup of the Large Hadron Collider (LHC).
- Published
- 2017
132. An SLC-Type e+</sup/> e−</sup/>/γγ Facility at a Future Circular Collider
- Author
-
Radoje Belusevic
- Subjects
Physics ,Particle physics ,010308 nuclear & particles physics ,Free-electron laser ,Particle accelerator ,01 natural sciences ,Future Circular Collider ,Linear particle accelerator ,law.invention ,Nuclear physics ,Pair production ,law ,Muon collider ,0103 physical sciences ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Neutrino ,010306 general physics ,Collider - Abstract
It is proposed to place the arcs of an SLC-type facility inside the tunnel of a Future Circular Collider (FCC). Accelerated by a linear accelerator (linac), electron and positron beams would traverse the bending arcs in opposite directions and collide at centre-of-mass energies considerably exceeding those attainable at circular e+e− colliders. The proposed SLC-type facility would have the same luminosity as a conventional two-linace e+e−collider. Using an optical free-electron laser, the facility could be converted into a γγ collider. A superconducting L-band linac at the proposed facility may form a part of the injector chain for a 100-TeV proton collider in the FCC tunnel. The whole accelerator complex would serve as a source of e+e−, γγ, pp and ep interactions. The L-band linac could also be used to produce high-intensity neutrino, kaon and muon beams for fixed-target experiments, as well as X-ray free-electron laser (XFEL) photons for applications in material science and medicine.
- Published
- 2017
133. The Higgs-boson production and decay at muon collider
- Author
-
S.S. Rzayeva, S. K. Abdullayev, and M.Sh. Gojayev
- Subjects
Physics ,Particle physics ,Muon collider ,Higgs boson ,Production (economics) - Published
- 2017
134. SppC Based Energy Frontier Lepton-Proton Colliders: Luminosity and Physics
- Author
-
B. B. Oner, S. Sultansoy, Bora Ketenoglu, Ali Can Canbay, and U. Kaya
- Subjects
Accelerator Physics (physics.acc-ph) ,Nuclear and High Energy Physics ,Particle physics ,Article Subject ,International Linear Collider ,Proton ,Physics::Instrumentation and Detectors ,FOS: Physical sciences ,Computer Science::Digital Libraries ,01 natural sciences ,High Energy Physics - Experiment ,law.invention ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,High Energy Physics - Phenomenology (hep-ph) ,law ,0103 physical sciences ,010306 general physics ,Collider ,Physics ,Muon ,Luminosity (scattering theory) ,010308 nuclear & particles physics ,High Energy Physics::Phenomenology ,lcsh:QC1-999 ,High Energy Physics - Phenomenology ,Muon collider ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Physics - Accelerator Physics ,Center of mass ,lcsh:Physics ,Lepton - Abstract
In this study, main parameters of Super proton-proton Collider (SppC) based lepton-proton colliders are estimated. For electron beam parameters, highest energy International Linear Collider (ILC) and Plasma Wake Field Accelerator-Linear Collider (PWFA-LC) options are taken into account. For muon beams, 1.5 TeV and 3 TeV center of mass energy Muon Collider parameters are used. In addition, ultimate $\mu$p collider which assumes construction of additional 50 TeV muon ring in the SppC tunnel is considered as well. It is shown that $L_{ep}$ $\sim$ $10^{32}$ $cm^{-2}s^{-1}$ can be achieved with moderate upgrade of the SppC proton beam parameters. Physics search potential of proposed lepton-proton colliders is illustrated by considering small Bjorken x region as an example of SM physics and resonant production of color octet leptons as an example of BSM physics., Comment: 11 pages, 3 figures, 8 tables
- Published
- 2017
135. A Muon Collider scheme based on Frictional Cooling
- Author
-
Abramowicz, H., Caldwell, A., Galea, R., and Schlenstedt, S.
- Subjects
- *
COLLIDERS (Nuclear physics) , *ESTIMATION theory , *MONTE Carlo method , *PHYSICAL sciences - Abstract
Abstract: Muon Colliders would usher in a new era of scientific investigation in the field of high-energy particle physics. The cooling of muon beams is proving to be the greatest obstacle in the realization of a Muon Collider. Monte Carlo simulations of a muon cooling scheme based on Frictional Cooling were performed. Critical issues, which require further study, relating to the technical feasibility of such a scheme are identified. Frictional Cooling, as outlined in this paper, provides sufficient six-dimensional emittance to make luminous collisions possible. It holds exciting potential in solving the problem of Muon Cooling. [Copyright &y& Elsevier]
- Published
- 2005
- Full Text
- View/download PDF
136. Beam-envelope theory of ionization cooling
- Author
-
Wang, Chun-xi and Kim, Kwang-Je
- Subjects
- *
IONIZATION (Atomic physics) , *SCISSION (Chemistry) , *COOLING , *MUONS - Abstract
Linear beam-envelope theory of ionization cooling in 6D phase space has been systematically established in the past few years. In this paper, we briefly review the general formalism as well as the specific theories for a quadrupole channel and a bent-solenoidal channel with symmetric focusing. These channels play important roles in the design of cooling channels for the envisioned neutrino factories and muon colliders. The analytical solutions of these channels are relatively simple yet provide good understanding of cooling and heating mechanisms in both transverse and longitudinal phase spaces. Furthermore, the resulting formulae can be used to evaluate cooling channel designs the same way as the radiation integrals are used in storage ring designs. [Copyright &y& Elsevier]
- Published
- 2004
- Full Text
- View/download PDF
137. Muon-cooling research and development
- Author
-
Kaplan, Daniel M.
- Subjects
- *
IONIZATION (Atomic physics) , *SCISSION (Chemistry) , *MUONS , *LEPTONS (Nuclear physics) - Abstract
The MuCool R&D program is described. The aim of MuCool is to develop all key pieces of hardware required for ionization cooling of a muon beam. This effort will lead to a more detailed understanding of the construction and operating costs of such hardware, as well as to optimized designs that can be used to build a Neutrino Factory or Muon Collider. This work is being undertaken by a broad collaboration including physicists and engineers from many national laboratories and universities in the US and abroad. The intended schedule of work will lead to ionization cooling being established well enough that a construction decision for a Neutrino Factory could be taken before the end of this decade based on a solid technical foundation. [Copyright &y& Elsevier]
- Published
- 2004
- Full Text
- View/download PDF
138. A frictional cooling demonstration experiment with protons
- Author
-
Galea, R., Caldwell, A., and Newburgh, L.
- Subjects
- *
PROTONS , *ATOMS , *COOLING , *SIMULATION methods & models - Abstract
Muon cooling is the main technological obstacle in the building of a muon collider. A muon cooling scheme based on Frictional Cooling holds promise in overcoming this obstacle. An experiment designed to demonstrate the Frictional Cooling concept using protons was undertaken. Although the results were inconclusive in the observation of cooling, the data allowed for the qualification of detailed simulations which are used to simulate the performance of a muon collider. [Copyright &y& Elsevier]
- Published
- 2004
- Full Text
- View/download PDF
139. Dispersion in a bent-solenoid channel
- Author
-
Wang, Chun-xi
- Subjects
- *
SOLENOIDS , *MUONS - Abstract
Longitudinal ionization cooling of a muon beam is essential for muon colliders and will be useful for neutrino factories. Bent-solenoid channels with symmetric focusing has been considered for beam focusing and for generating the required dispersion in the “emittance exchange” scheme of longitudinal cooling. In this paper, we derive the Hamiltonian that governs the linear beam dynamics of a bent-solenoid channel, solve the single-particle dynamics, and give equations for determining the lattice functions, in particular, the dispersion functions. [Copyright &y& Elsevier]
- Published
- 2003
- Full Text
- View/download PDF
140. Linear theory of transverse and longitudinal ionization cooling in a quadrupole channel
- Author
-
Wang, Chun-xi and Kim, Kwang-Je
- Subjects
- *
IONIZATION (Atomic physics) , *MUONS - Abstract
Ionization cooling is the best-known cooling mechanism for the envisioned muon colliders and neutrino factories. In this paper, using the moment-equation approach, we present a linear theory of ionization cooling dynamics in 6D phase space in a quadrupole focusing channel. A simple set of differential equations that governs the evolution of both the transverse and longitudinal emittances is derived, and closed-form solutions are given. Two new significant heating processes have been identified. This theory is analogous to the standard linear theory in electron storage rings. Multiple scattering integrals and energy straggling integrals, quantities like the synchrotron radiation integrals, are introduced to specify the cooling process and the equilibrium emittances in a periodic cooling channel. [Copyright &y& Elsevier]
- Published
- 2003
- Full Text
- View/download PDF
141. Muon emittance and pion decay
- Author
-
Autin, B.
- Subjects
- *
NEUTRINOS , *MUONS - Abstract
An efficient collection of muons is a crucial task for machines such as neutrino factories or muon colliders. The definition of the beam emittance and the determination of the capture efficiencies both in transverse and longitudinal spaces is made difficult by the transition from the pion to the muon beam through the decay process. An analytical approach to the problem is derived for a transport line where path length variations can be neglected. [Copyright &y& Elsevier]
- Published
- 2003
- Full Text
- View/download PDF
142. Towards a Higgs factory/muon collider
- Author
-
Hanson, Gail G.
- Subjects
- *
HIGGS bosons , *MUONS ,SCATTERING - Abstract
The physics issues of a muon collider Higgs factory are discussed. Conversion of a neutrino factory to a Higgs factory and progress in R&D towards a muon collider are summarized. [Copyright &y& Elsevier]
- Published
- 2003
- Full Text
- View/download PDF
143. An R&D program for targetry and capture at a neutrino factory and muon collider source
- Author
-
Hassenein, A., Bernadon, A., Beshears, D.L., Brown, K.A., Cates, M.C., Fabich, A., Fernow, R.C., Finfrock, C.C., Fukui, Y., Gabriel, T.A., Gassner, D.M., Green, M.A., Greene, G.A., Haines, J.R., Johnson, C.D., Kahn, S.A., King, B.J., Kirk, H.G., Lettry, J., and Lu, C.
- Subjects
- *
PARTICLE beams , *MUONS - Abstract
The need for intense muon beams for muon colliders and for neutrino factories based on muon storage rings leads to a concept of 1–4 MW proton beams incident on a moving target that is inside a 20-T solenoid magnet, with a mercury jet as a preferred example. Novel technical issues for such a system include disruption of the mercury jet by the proton beam and distortion of the jet on entering the solenoid, as well as more conventional issues of materials lifetime and handling of activated materials in an intense radiation environment. As part of the R&D program of the Neutrino Factory and Muon Collider Collaboration, an R&D effort related to targetry is being performed within the context of experiment E951 at Brookhaven National Laboratory, first results of which are reported here. [Copyright &y& Elsevier]
- Published
- 2003
- Full Text
- View/download PDF
144. Superconductivity applications in accelerator projects beyond LHC
- Author
-
Wake, Masayoshi
- Subjects
- *
SUPERCONDUCTIVITY , *MUONS , *COLLIDERS (Nuclear physics) - Abstract
High-energy accelerators have been in the front of superconductivity applications. Since the LHC project of 14 TeV hadron collider is going to be completed in 2006, next stage of accelerator development is under discussion. Linear collider, muon collider and VLHC are the three major directions for the future. New superconducting materials are expected to play an important role in these applications. Cost reduction is necessary to make real use of new materials. [Copyright &y& Elsevier]
- Published
- 2002
- Full Text
- View/download PDF
145. Ion dynamics in plasma compensation scheme
- Author
-
Timofeev, I.V. and Lotov, K.V.
- Subjects
- *
PLASMA gases , *COLLIDERS (Nuclear physics) , *MUONS - Abstract
In this paper the ability of a plasma to compensate beam-induced fields at the interaction point of muon colliders is discussed. Among numerous factors that limit beam and plasma parameters for which a given compensation degree can be achieved, one of the most important limitations (the motion of plasma ions) is analyzed in details. It is found that this limitation is determined by an instability of the relative motion of plasma electrons and ions. It is shown that discussed parameters of ultimate muon colliders fall outside the applicability area of plasma compensation. [Copyright &y& Elsevier]
- Published
- 2002
- Full Text
- View/download PDF
146. A global view of the off-shell Higgs portal
- Author
-
Maximilian Ruhdorfer, Ennio Salvioni, and Andreas Weiler
- Subjects
Particle physics ,Physics::Instrumentation and Detectors ,Physics beyond the Standard Model ,FOS: Physical sciences ,General Physics and Astronomy ,01 natural sciences ,law.invention ,Standard Model ,Vector boson ,High Energy Physics - Experiment ,High Energy Physics - Experiment (hep-ex) ,High Energy Physics - Phenomenology (hep-ph) ,law ,0103 physical sciences ,010306 general physics ,Collider ,Boson ,Particle Physics - Phenomenology ,Physics ,Large Hadron Collider ,010308 nuclear & particles physics ,hep-ex ,High Energy Physics::Phenomenology ,hep-ph ,lcsh:QC1-999 ,ddc ,High Energy Physics - Phenomenology ,Muon collider ,Higgs boson ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,lcsh:Physics ,Particle Physics - Experiment - Abstract
We study for the first time the collider reach on the derivative Higgs portal, the leading effective interaction that couples a pseudo Nambu-Goldstone boson (pNGB) scalar Dark Matter to the Standard Model. We focus on Dark Matter pair production through an off-shell Higgs boson, which is analyzed in the vector boson fusion channel. A variety of future high-energy lepton colliders as well as hadron colliders are considered, including CLIC, a muon collider, the High-Luminosity and High-Energy versions of the LHC, and FCC-hh. Implications on the parameter space of pNGB Dark Matter are discussed. In addition, we give improved and extended results for the collider reach on the marginal Higgs portal, under the assumption that the new scalars escape the detector, as motivated by a variety of beyond the Standard Model scenarios., 12 pages + appendices and references, 10 figures; v2: minor revisions and a few additions, including extra references; v3: new figure comparing VBF reach to parameter regions compatible with first-order EW phase transition (Figure 9), additional references. This version is more up to date than the published one
- Published
- 2019
147. Study of Physics Performances at Muon Collider
- Author
-
Massimo Casarsa, Alessio Gianelle, A. Ferrari, Lorenzo Sestini, Donatella Lucchesi, Nazar Bartosik, Paola Sala, Nadia Pastrone, Alessandro Bertolin, Nikolai Mokhov, Sergei Striganov, and Francesco Collamati
- Subjects
Physics ,Luminosity (scattering theory) ,Muon ,Interaction point ,Physics::Instrumentation and Detectors ,Detector ,Synchrotron radiation ,Radiation ,law.invention ,Nuclear physics ,law ,Muon collider ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,Collider - Abstract
Muon Collider is a promising option for the next generation high-energy collider, possessing very low radiation losses due to synchrotron radiation. Treatment of the beam-induced background is one of the most critical issues in such a machine. Since the muon beams must be very intense to reach high luminosity, the muons decay products and subsequent particles from secondary interactions with the environment can reach the interaction point, limiting the physical performance of the detector. This talk presents a reconstruction strategy for a benchmark process, H->bb-bar, in the presence of the beam-induced background.
- Published
- 2019
148. On the study of the Higgs properties at a muon collider
- Author
-
Mario Greco
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Muon ,Physics::Instrumentation and Detectors ,High Energy Physics::Phenomenology ,FOS: Physical sciences ,General Physics and Astronomy ,Astronomy and Astrophysics ,Electron ,Standard Model ,High Energy Physics - Phenomenology ,High Energy Physics - Phenomenology (hep-ph) ,Muon collider ,Higgs boson ,Radiative transfer ,Physics::Accelerator Physics ,High Energy Physics::Experiment - Abstract
The discovery of the Higgs particle at 125 GeV is demanding a detailed knowledge of the properties of this fundamental component of the Standard Model. To that aim various proposals of electron and muon colliders have been put forward for precision studies of the partial widths of the various decay channels. It is shown that in the case of a Higgs factory through a muon collider, sizeable radiative effects - of order of 50% - must be carefully taken into account for a precise measurement of the leptonic and total widths of the Higgs particle. Similar effects do not apply in the case of Higgs production in electron-positron colliders., Comment: 4 pages
- Published
- 2019
149. Study of muon pair production from positron annihilation at threshold energy
- Author
-
Alessandro Bertolin, Marco Zanetti, Francesco Collamati, Nadia Pastrone, Jacopo Pazzini, M. Ricci, Francesco Iacoangeli, Roberto Rossin, M. Soldani, M. Prest, Nazar Bartosik, Lorenzo Sestini, C. Brizzolari, G. Cavoto, M. Pelliccioni, C. Biino, M. Antonelli, Oscar Blanco-García, Alessandra Cappati, Donatella Lucchesi, V. Mascagna, G. Cotto, Andrea Triossi, Massimo Casarsa, G. Ballerini, B. Kiani, Laura Bandiera, Alessandro Paccagnella, O. Sans Planell, S. Y. Hoh, Nicola Amapane, F. Anulli, M. Iafrati, C. Curatolo, M. Bauce, M. Rotondo, Sandro Ventura, F. Gonella, B. Ponzio, R. Di Nardo, Manuela Boscolo, E. Vallazza, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), LEMMA, and Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
at rest ,particle accelerator ,Physics - Instrumentation and Detectors ,Physics::Instrumentation and Detectors ,Electron–positron annihilation ,muon collider ,muon: storage ring ,7. Clean energy ,01 natural sciences ,030218 nuclear medicine & medical imaging ,High Energy Physics - Experiment ,High Energy Physics - Experiment (hep-ex) ,energy: threshold ,0302 clinical medicine ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,beam-intensity monitors ,Detectors and Experimental Techniques ,Instrumentation ,physics.ins-det ,Mathematical Physics ,Physics ,Accelerator Subsystems and Technologies ,Beam-line instrumentation (beam position and profile monitors ,bunch length monitors) ,Muon spectrometers ,Annihilation ,Instrumentation and Detectors (physics.ins-det) ,Threshold energy ,Muon collider ,Beam emittance ,numerical calculations: Monte Carlo ,muon: accelerator ,Particle Physics - Experiment ,low emittance muon beam ,CERN Lab ,FOS: Physical sciences ,electron positron: annihilation ,Nuclear physics ,03 medical and health sciences ,0103 physical sciences ,hal-02327699 ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Muon ,010308 nuclear & particles physics ,muon: beam ,hep-ex ,beam emittance ,Pair production ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,spectrometer ,dipole ,Lepton - Abstract
The muon collider represents one of the most promising solutions for a future machine exploring the high energy frontier, but several challenges due to the 2.2 $\mu$sec muon lifetime at rest have to be carefully considered. The LEMMA project is investigating the possibility of producing low emittance muon/antimuon pairs from the e$^+$e$^-$ annihilation process at threshold energy, resulting in small transverse emittance beams without any additional beam cooling. However most of the measurements available are performed at higher $\sqrt{s}$ values. It is therefore necessary to measure muons production in positron annihilation at threshold energy and compare the experimental results with the predictions in this specific energy regime. Apart from being a topic of physical interest by itself, these near to threshold measurements can have a sizeable impact on the estimation of the ultimate luminosity achievable in a muon collider with the LEMMA injection scheme., Comment: 13 pages, 8 figures
- Published
- 2019
150. The Future Prospects of Muon Colliders and Neutrino Factories
- Author
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Manuela Boscolo, Jean Pierre Delahaye, and Mark Palmer
- Subjects
Accelerator Physics (physics.acc-ph) ,High energy ,Particle physics ,Physics - Instrumentation and Detectors ,Physics::Instrumentation and Detectors ,FOS: Physical sciences ,High Energy Physics - Experiment ,law.invention ,High Energy Physics - Experiment (hep-ex) ,Quality (physics) ,law ,Detectors and Experimental Techniques ,Collider ,physics.ins-det ,Earth-Surface Processes ,physics.acc-ph ,Physics ,Muon ,Large Hadron Collider ,hep-ex ,High intensity ,Instrumentation and Detectors (physics.ins-det) ,Accelerators and Storage Rings ,Proton (rocket family) ,Muon collider ,Physics::Accelerator Physics ,Physics - Accelerator Physics ,Neutrino Factory ,High Energy Physics::Experiment ,Lower cost ,Neutrino ,Particle Physics - Experiment ,Lepton - Abstract
The potential of muon beams for high energy physics applications is described along with the challenges of producing high quality muon beams. Two proposed approaches for delivering high intensity muon beams, a proton driver source and a positron driver source, are described and compared. The proton driver concepts are based on the studies from the Muon Accelerator Program (MAP). The MAP effort focused on a path to deliver muon-based facilities, ranging from neutrino factories to muon colliders, that could span research needs at both the intensity and energy frontiers. The Low EMittance Muon Accelerator (LEMMA) concept, which uses a positron-driven source, provides an attractive path to very high energy lepton colliders with improved particle backgrounds. The recent study of a 14 TeV muon collider in the LHC tunnel, which could leverage the existing CERN injectors and infrastructure and provide physics reach comparable to the 100 TeV FCC-hh, at lower cost and with cleaner physics conditions, is also discussed. The present status of the design and R&D efforts towards each of these sources is described. A summary of important R&D required to establish a facility path for each concept is also presented., 29 pages, 17 figures
- Published
- 2019
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