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Superconducting magnets for muon capture and phase rotation

Description: There are two key systems that must operate efficiently, in order for a muon collider to be a viable option for high energy physics. These systems are the muon production and collection system and the muon cooling system. Both systems require the use of high field superconducting solenoid magnets. This paper describes the supcrconducting solenoid system used for the capture and phase rotation of the pions that are produced on a target in a high intensity proton beam.
Date: July 26, 1999
Creator: Green, M.A. & Weggel, R.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Conceptual Design of Pion Capture Magnets of Up to 15 Cm Bore and 20 T Peak Field.

Description: For the Neutrino Factory and Muon Collider Collaboration, BNL has considered solenoidal magnet systems of several types to capture pions generated by bombarding a mercury jet with multi-GeV protons. The magnet systems generate up to 20 T, uniform to 5% throughout a cylindrical volume 0.15 m in diameter and 0.6 m long. Axially downstream the field ramps gradually downward by a factor of sixteen, while the bore increases fourfold. The steady-state system needed for an accelerator has many superco… more
Date: September 24, 2001
Creator: Weggel, R. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Behavior of conducting solid or liquid jet moving in magnetic field: (1) paraxial; (2) transverse; (3) oblique

Description: When a conductor moves through a nonuniform magnetic field, eddy currents flow that interact with the field to decelerate the conductor and perhaps change its trajectory, orientation and, if a liquid, shape. A rod of radius a = 1 cm and the density and electrical conductivity of melted gallium ({gamma} = 6.1 g/cm{sup 3}, {rho} = 26 {micro}{Omega} cm) will decelerate 6.3 m/s in a 0.5 m ramp of paraxial field with a constant gradient g of 40 T/m ({Delta}B = 20 T). The deceleration is proportional… more
Date: June 1, 1998
Creator: Weggel, R.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pion Yield vs. Geometry of Target and -20T Pulse Solenoid for a Muon Collider Experiment.

Description: The Muon Collider Collaboration is proposing a pion-capture experiment that employs BNL's Alternating Gradient Synchrotron, a liquid metal target, and a pulse solenoid precooled by liquid nitrogen. This paper compares the yield with various target diameters, orientations and magnetic field profiles. To equalize costs, all magnets have the same mass, 12 metric tons. The magnet has two nested shells, energized sequentially. The outer set of coils, energized at 4 MVA, generates {approx}1/3 of the … more
Date: March 29, 1999
Creator: Weggel, R. J. & Mokhov, N. V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Design Study of 20 T, 15 CM Bore Hybrid Magnet with Radiation Resistant Insert for PION Capture

Description: To capture pions the Neutrino Factory and Muon Collider Collaboration needs a field of {approx}20 T throughout a cylinder 15 cm in diameter and 60 cm long, falling over the next 18 m to 1.25 T, while the bore increases fourfold inversely as the square root of the field. We propose a hybrid system. The superconducting magnet is of world-class parameters, storing 600 MJ and including a coil to generate 14 T in a bore of {approx}1.3 m. Intercoil forces reach 100 MN. For high radiation resistance, … more
Date: June 18, 2001
Creator: Weggel, R. J.; Pearson, C. E. & King, B. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Superconducting solenoids for the Muon collider

Description: The muon collider is a new idea for lepton colliders. The ultimate energy of an electron ring is limited by synchrotron radiation. Mouns, which have a rest mass that is 200 times that of an electron can be stored at much higher energies before synchrotron radiation limits ring performance. The problem with muon is their short lifetime (2.1 microseconds at rest). In order to operate a muon storage ring large numbers of muon must be collected, cooled and accelerated before they decay to an electr… more
Date: September 23, 1999
Creator: Green, M. A.; Eyssa, Y.; Kenny, S.; Miller, J. R.; Prestemon, S. & Weggel, R. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Rotating Metal Band Target for PION Production at MUON Colliders

Description: A conceptual design is presented for a high power pion production target for muon colliders that is based on a rotating metal band. Three candidate materials are considered for the target band: inconel alloy 718, titanium alloy 6Al-4V grade 5 and nickel. A pulsed proton beam tangentially intercepts a chord of the target band that is inside a 20 Tesla tapered solenoidal magnetic pion capture channel similar to designs previously considered for muon colliders and neutrino factories. The target ba… more
Date: January 18, 2002
Creator: King, B. J.; Simos, N.; Weggel, R. V. & Mokhov, N. V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Rotating Metal Band Target for Pion Production at Neutrino Factories and Muon Colliders.

Description: A conceptual design is presented for a high power pion production target for neutrino factories and muon colliders that is based on a rotating metal band of either inconel alloy 718, titanium alloy 6AL4V grade 5 or nickel. The band is 5 meters in diameter and is tangentially intercepted by a pulsed proton beam inside a 20 Tesla tapered solenoidal magnetic pion capture channel. The mechanical layout and cooling setup of the target are summarized and results are presented from realistic MARS and … more
Date: June 18, 2001
Creator: King, B. J.; Simos, N.; Weggel, R. V. & Mokhov, N. V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Cupronickel Rotating Band Pion Production Target for Muon Colliders.

Description: A conceptual design is presented for a high power cupronickel pion production target. It forms a circular band in a horizontal plane with approximate dimensions of: 2.5 meters radius, 6 cm high and 0.6 cm thick. The target is continuously rotated at 3 m/s to carry heat away from the production region to a water cooling channel. Bunches of 16 GeV protons with total energies of 270 kl and repetition rates of 15 Hz are incident tangentially to arc of the target along the symmetry axis of a 20 Tesl… more
Date: March 29, 1999
Creator: King, B. J.; Weggel, R. J.; Mokhov, N. V. & Moser, S. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Rotating Inconel Band Target for Pion Production at a Neutrino Factory, Using Study Ii Parameters.

Description: A conceptual design is presented for a high power pion production target, based on a rotating band of inconel alloy 718, that is intended to provide a back-up targetry option for the Neutrino Factory Study II. The target band has a 2.5 m radius and has an I-beam cross section that is 6 cm high and with a 0.6 cm thick webbing. The pion capture scenario and proton beam parameters are as specified for the Study II base-line targetry option, i.e. capture into a 20 Tesla tapered solenoidal channel w… more
Date: May 4, 2001
Creator: King, B. J.; Simos, N. P.; Weggel, R. V. & Mokhov, N. V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Calculations for a Mercury Jet Target in a Solenoid Magnet Capture System.

Description: A mercury jet is being considered as the production target for a muon storage ring facility to produce an intense neutrino beam. A 20 T solenoid magnet that captures pions for muon production surrounds the mercury target. As the liquid metal jet enters or exits the field eddy currents are induced. We calculate the effects that a liquid metal jet experiences in entering and exiting the magnetic field for the magnetic configuration considered in the Neutrino Factory Feasibility Study II.
Date: June 18, 2001
Creator: Gallardo, J.; Kahn, S.; Palmer, R. B.; Thieberger, P.; Weggel, R. J. & Mcdonald, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Open-Midplane Dipoles for a Muon Collider

Description: For a muon collider with copious decay particles in the plane of the storage ring, open-midplane dipoles (OMD) may be preferable to tungsten-shielded cosine-theta dipoles of large aperture. The OMD should have its midplane completely free of material, so as to dodge the radiation from decaying muons. Analysis funded by a Phase I SBIR suggests that a field of 10-20 T should be feasible, with homogeneity of 1 x 10{sup -4} and energy deposition low enough for conduction cooling to 4.2 K helium. If… more
Date: March 28, 2011
Creator: Weggel, R.; Gupta, R. & Kolonko, J., Scanlan, R., Cline, D., Ding, X., Anerella, M., Kirk, H., Palmer, B., Schmalzle, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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SUPERCONDUCTING SOLENOIDS FOR THE MUON COLLIDER

Description: The muon collider is a new idea for lepton colliders. The ultimate energy of an electron ring is limited by synchrotron radiation. Muons, which have a rest mass that is 200 times that of an electron can be stored at much higher energies before synchrotron radiation limits ring performance. The problem with muons is their short life time (2.1 {micro}s at rest). In order to operate a muon storage ring large numbers of muon must be collected, cooled and accelerated before they decay to an electron… more
Date: June 12, 2000
Creator: Green, M. A.; Eyssa, Y.; Kenny, S.; Miller, J. R.; Prestemon, S. & Weggel, R. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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MOVING SOLID METALLIC TARGETS FOR PION PRODUCTION IN THE MUON COLLIDER/NEUTRINO FACTORY PROJECT.

Description: The production of large fluxes of pions and muons using high-energy, high-intensity proton pulses impinging on solid or liquid targets presents unique problems which have not yet been entirely solved. We investigate the possibilities of using solid targets by choosing a metal of either extremely low thermal expansion coefficient 1 or exceptionally high mechanical strength. Candidates are respectively Super-Invar and Vascomax 350 or Inconel 718. Moving targets in the form of chains or cables wou… more
Date: March 3, 2004
Creator: THIEBERGER,P. KIRK,H. G. WEGGEL,R. J. MCDONALD,K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Primary Target Facility for a Neutrino Factory Based on MUON Beams

Description: Neutrino beams from the decay of muons in a storage ring offer the prospect of very high flux, well-understood spectra, and equal numbers of electron and muon neutrinos, as desirable for detailed exploration of neutrino oscillations via long baseline detectors [1]. Such beams require. large numbers of muons, and hence a high performance target station at which a 1-4 MW proton beam of 16-24 GeV impinges on a compact target, all inside a high field solenoid channel to capture as much of the phase… more
Date: June 18, 2001
Creator: Hassenein, A.; Kahn, S. A.; King, B, J.; Kirk, H. G.; Ludewig, H.; Palmer, R. B. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Target Studies with BNL E951 at the AGS

Description: We report initial results of exposing low-Z solid and high-Z liquid targets to 150-ns, 4 x 10{sup 12} proton pulses with spot sizes on the order of 1 to 2 mm. The energy deposition density approached 100 J/g. Diagnostics included fiberoptic strain sensors on the solid target and high-speed photography of the liquid targets. This work is part of the R and D program of the Neutrino Factory and Muon Collider Collaboration.
Date: June 18, 2001
Creator: Kirk, H.; Brown, K.; Fernow, R.; Finfrock, C.; Gassner, D.; Greene, G. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Role of Superconductivity and Cryogenics in the Neutrinofactory

Description: The proposed neutrino factory will produce a defined beam of neutrinos from the decay of muons in a storage ring[1,2,3]. The storage ring will be oriented so that the neutrinos can be detected at one or more detectors several thousand kilometers from the storage ring. This report presents an overview of the proposed neutrino factory and its subsystems that use cryogenics. Superconducting magnets will be used in the following ways in the neutrino factory; (1) the outsert solenoid for the 20 T pi… more
Date: May 6, 2001
Creator: Green, M. A.; Black, E. L.; Gupta, R. C.; Iarocci, M. A.; Lebedev, V.; Miller, J. R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The R and D Program for Targetry at a Neutrino Factory

Description: The need for intense muon beams for muon colliders [1] and for neutrino factories based on muon storage rings [2,3,4] leads to a concept of 1-4 MW proton beams incident 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 activate… more
Date: June 18, 2001
Creator: McDonald, K. T.; Brown, K. A.; Finfrock, C. C.; Gassner, D. M.; Greene, G. A.; Hanson, A. L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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