Author: Lopes, M.L.
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MOPME031 SolCalc: A Suite for the Calculation and the Display of Magnetic Fields Generated by Solenoid Systems 445
 
  • M.L. Lopes
    Fermilab, Batavia, Illinois, USA
 
  SolCalc is a software suite that computes and displays magnetic fields generated by a three dimensional (3D) solenoid system. Examples of such systems are the Mu2e magnet system and Helical Solenoids for muon cooling systems. SolCalc was originally coded in Matlab, and later upgraded to a compiled version (called MEX) to improve solving speed. Matlab was chosen because its graphical capabilities represent an attractive feature over other computer languages. Solenoid geometries can be created using any text editor or spread sheets and can be displayed dynamically in 3D. Fields are computed from any given list of coordinates. The field distribution on the surfaces of the coils can be displayed as well. SolCalc was benchmarked against a well-known commercial software for speed and accuracy and the results compared favorably.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPME031  
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TUPRO115 Progress on the Dipole Magnet for a Rapid Cycling Synchrotron 1322
 
  • H. Witte, J.S. Berg
    BNL, Upton, Long Island, New York, USA
  • M.L. Lopes
    Fermilab, Batavia, Illinois, USA
 
  Funding: Work supported by Brookhaven Science Associates, LC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
A rapid cycling hybrid synchrotron has been proposed for the acceleration of muons from 375 to 750 GeV. The bending in a hybrid synchrotron is created with interleaved cold and warm dipoles; the warm dipoles modulate the average bending field for the different particle momenta. A key challenge for the warm dipole magnets is the ramp rate, which is equivalent to frequencies of 400-1000 Hz. Recently a design has been suggested which employs 6.5 Si steel for the return yoke and FeCo for the poles. In simulations the design has shown a good performance (up to 2T) due to the FeCo and acceptable power losses by employing SiFe with a high Si content. The paper discusses the effect of eddy currents induced in the laminations and hysteresis effects on the field quality.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO115  
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TUPRO116 Conceptual Design of the Muon Cooling Channel to Incorporate RF Cavities 1325
 
  • S.A. Kahn, G. Flanagan, F. Marhauser
    Muons, Inc, Illinois, USA
  • M.L. Lopes, K. Yonehara
    Fermilab, Batavia, Illinois, USA
 
  Funding: Work supported by U.S. DOE STTR/SBIR grant DE-SC00006266
A helical cooling channel (HCC) consisting of a pressurized gas absorber imbedded in a magnetic channel that provides solenoid, helical dipole and helical quadrupole fields has been shown to provide six-dimensional phase space reduction for muon beams. Such a channel can be implemented by a helical solenoid (HS) composed of short solenoid coils arranged in a helical pattern. The magnetic channel will provide the desired Bphi, Bz, and dBphi/dr along the reference path. The channel must allow enough space for RF cavities which replace energy lost in the absorber material present for the cooling process. The study will describe how to achieve the desired field while allowing sufficient space for the cavities. The limits to this design imposed by the achievable current density in the coils will be discussed.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO116  
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WEPRI100 Magnetic Design Constraints of Helical Solenoids 2731
 
  • M.L. Lopes, S. Krave, J.C. Tompkins, K. Yonehara
    Fermilab, Batavia, Illinois, USA
  • G. Flanagan, S.A. Kahn
    Muons, Inc, Illinois, USA
  • K.E. Melconian
    Texas A&M University, College Station, Texas, USA
 
  Helical solenoids have been proposed as an option for a Helical Cooling Channel for muons in a proposed Muon Collider. Helical solenoids can provide the required three main field components: solenoidal, helical dipole, and a helical gradient. In general terms, the last two are a function of many geometric parameters: coil aperture, coil radial and longitudinal dimensions, helix period and orbit radius. In this paper, we present design studies of a Helical Solenoid, addressing the geometric tunability limits and auxiliary correction system.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRI100  
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