Author: Melconian, K.E.
Paper Title Page
WEPTY033 A Concept for a High-field Helical Solenoid 3345
 
  • S. Krave, N. Andreev, R. Bossert, M.L. Lopes, J.C. Tompkins, R. Wands
    Fermilab, Batavia, Illinois, USA
  • G. Flanagan
    Muons, Inc, Illinois, USA
  • K.E. Melconian
    Texas A&M University, College Station, Texas, USA
  
  Funding: Fermi Research Alliance under DOE Contract DE-AC02-07CH11359
Helical cooling channels have been proposed for highly efficient 6D muon cooling to produce the required helical solenoidal, dipole, and gradient field components. The channel is divided into sections, each subsequent section with higher field. Simulations have shown that for the high-field sections the use of Nb3Sn superconductor is needed. A continuous winding method and novel stainless steel collaring system has been developed for use in the high field section of a helical cooling channel. Each collar layer is identical, for ease of fabrication, and assembled by both flipping and rotating the subsequent layers. Mechanical and magnetic simulations were performed using a combination of ANSYS and OPERA. The winding and collaring method has been demonstrated on a four coil prototype using a Nb3Sn Rutherford cable. Details of the mechanical design, magnetic modeling, and winding method are presented. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPTY033  
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WEPTY059 Alternative Methods for Field Corrections in Helical Solenoids 3409
 
  • K.E. Melconian
    Texas A&M University, College Station, Texas, USA
  • G. Flanagan, S.A. Kahn
    Muons, Inc, Illinois, USA
  • S. Krave, M.L. Lopes, J.C. Tompkins, K. Yonehara
    Fermilab, Batavia, Illinois, USA
  
  Funding: Fermi Research Alliance under DOE Contract DE-AC02-07CH11359
Helical cooling channels have been proposed for highly efficient 6D muon cooling. Helical solenoids produce solenoidal, helical dipole, and helical gradient field components. Previous studies explored the geometric tunability limits on these main field components. In this paper we present two alternative correction schemes, tilting the solenoids and the addition of helical lines, to reduce the required strength of the anti-solenoid and add an additional tuning knob. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPTY059  
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THPF135 Optimization of Orbits, SRF Acceleration, and Focusing Lattice for a Strong-Focusing Cyclotron 4038
 
  • K.E. Melconian, S. Assadi, J. Gerity, J.N. Kellams, P.M. McIntyre, A. Sattarov
    Texas A&M University, College Station, Texas, USA
  • N. Pogue
    PSI, Villigen, Villigen, Switzerland
  
  The strong-focusing cyclotron is a high-current proton/ion accelerator in which superconducting rf cavities are used to provide enough energy gain per turn to fully separate orbits, and arc-shaped beam transport channels are located in the sector dipole aperture to provide strong focusing of all orbits. An optimization method has been devised by which the orbit separations can be adjusted to provide sufficient separation while maintaining isochronicity on all orbits. The transport optics of the FD lattice is also optimized to provide stable transport and to lock the betatron tunes to a favorable value over the full range of acceleration.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF135  
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