IPAC2015 - List of Authors (Lopes, M.L.)

Paper	Title	Page
WEPTY003	Magnet Designs for the Multi-bend Achromat Lattice at the Advanced Photon Source	3260
	M.S. Jaski, J. Liu ANL, Argonne, Illinois, USA D.J. Harding, V.S. Kashikhin, M.L. Lopes Fermilab, Batavia, Illinois, USA A.K. Jain, C.J. Spataro BNL, Upton, Long Island, New York, USA
	Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357. The Advanced Photon Source (APS) is currently investigating replacing the existing two-bend 7 GeV lattice with a 6 GeV seven-bend achromat magnet lattice in order to achieve a low electron beam emittance. This new lattice requires 1320 magnets, of which there are nine types. These include high strength quadrupoles (gradient up to ~97 T/m), sextupoles with second derivative of field up to ~7000 T/m2, longitudinal gradient dipoles with field ratio of up to 5, and transverse gradient dipoles with gradients of ~50 T/m and central field of ~0.6 T. These field requirements and the limited space available pose several design challenges. This paper presents a summary of magnet designs for the various magnet types developed through a collaboration of APS with FNAL and BNL.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPTY003
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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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Paper

Title

Page

Magnet Designs for the Multi-bend Achromat Lattice at the Advanced Photon Source

3260

M.S. Jaski, J. Liu
ANL, Argonne, Illinois, USA
D.J. Harding, V.S. Kashikhin, M.L. Lopes
Fermilab, Batavia, Illinois, USA
A.K. Jain, C.J. Spataro
BNL, Upton, Long Island, New York, USA

Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357.
The Advanced Photon Source (APS) is currently investigating replacing the existing two-bend 7 GeV lattice with a 6 GeV seven-bend achromat magnet lattice in order to achieve a low electron beam emittance. This new lattice requires 1320 magnets, of which there are nine types. These include high strength quadrupoles (gradient up to ~97 T/m), sextupoles with second derivative of field up to ~7000 T/m2, longitudinal gradient dipoles with field ratio of up to 5, and transverse gradient dipoles with gradients of ~50 T/m and central field of ~0.6 T. These field requirements and the limited space available pose several design challenges. This paper presents a summary of magnet designs for the various magnet types developed through a collaboration of APS with FNAL and BNL.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPTY003

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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

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

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

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)