• M.L. Lopes, V.S. Kashikhin, A.V. Zlobin
  Fermilab, Batavia
• R.P. Johnson, S.A. Kahn
  Muons, Inc, Batavia

Funding: Supported in part by USDOE STTR Grant DE-FG02-07ER84825

This paper presents the results of design studies of a high field section of a helical cooling channel proposed for the 6D muon beam cooling. The results include the magnet aperture limitations, the tunability of field components, the field correction, the superconductor choice and the magnet operation margin.

• K. Yonehara, V.S. Kashikhin, M.J. Lamm, M.L. Lopes, A.V. Zlobin
  Fermilab, Batavia
• R.P. Johnson, S.A. Kahn, M.L. Neubauer
  Muons, Inc, Batavia

Funding: Supported in part by USDOE STTR Grant DE-FG02-07ER84825 and by FRA under DOE Contract DE-AC02-07CH11359

The helical cooling channel is proposed to make a quick muon beam phase space cooling in a short channel length. The challenging part of the helical cooling channel magnet design is how to integrate the RF cavity into the compact helical cooling magnet. This report shows the possibility of the integration of the system.

• M.J. Lamm, N. Andreev, V. Kashikhin, V.S. Kashikhin, A.V. Makarov, M.A. Tartaglia, K. Yonehara, M. Yu, A.V. Zlobin
  Fermilab, Batavia
• R.P. Johnson, S.A. Kahn
  Muons, Inc, Batavia

Funding: Supported in part by USDOE STTR Grant DE-FG02-06ER86282

Magnets for the proposed muon cooling demonstration experiment MANX (Muon collider And Neutrino factory eXperiment) have to generate longitudinal solenoid and transverse helical dipole and helical quadrupole fields. This paper discusses the 0.4 M diameter 4-coil Helical Solenoid (HS) model design, manufacturing, and testing that has been done to verify the design concept, fabrication technology, and the magnet system performance. The model quench performance in the FNAL Vertical Magnet Test Facility (VMTF) will be discussed.

• S. Caspi, D.W. Cheng, D.R. Dietderich, H. Felice, P. Ferracin, R.R. Hafalia, R. Hannaford, G.L. Sabbi
  LBNL, Berkeley, California
• G. Ambrosio, R. Bossert, V. Kashikhin, D. Pasholk, A.V. Zlobin
  Fermilab, Batavia
• M. Anerella, A.K. Ghosh, J. Schmalzle, P. Wanderer
  BNL, Upton, Long Island, New York

Funding: This work was supported in part by the Director, Office of Science, High Energy Physics, U.S. Department of Energy under contract No. DE-AC02-05CH11231

Pushing accelerator magnets beyond 10 T holds a promise of future upgrades to machines like the Large Hadron Collider (LHC) at CERN. Nb3Sn conductor is at the present time the only practical superconductor capable of generating fields beyond 10 T. In support of the LHC Phase-II upgrade, the US LHC Accelerator Research Program (LARP) is developing a large bore (120mm) IR quadrupole (HQ) capable of reaching 15 T at its conductor peak field. The 1 m long two-layer coil, based on the design of the LARP TQ quadrupole series that achieved 230 T/m in a 90 mm bore, will demonstrate additional features such as alignment and accelerator field quality while exploring the magnet performance limits in terms of gradient, forces and stresses. In this paper we summarize the design and report on the magnet construction progress.

• K. Yonehara, V.S. Kashikhin, M.J. Lamm, A.V. Zlobin
  Fermilab, Batavia
• R.J. Abrams, C.M. Ankenbrandt, M.A.C. Cummings, R.P. Johnson, S.A. Kahn
  Muons, Inc, Batavia
• J.A. Maloney
  Northern Illinois University, DeKalb, Illinois

Funding: Supported in part by USDOE STTR Grant DE-FG02-06ER86282 and by FRA under DOE Contract DE-AC02-07CH11359

MANX is a six-dimensional muon ionization cooling demonstration experiment based on the concept of a helical cooling channel in which a beam of muons loses energy in a continuous helium or hydrogen absorber while passing through a special superconducting magnet called a helical solenoid. The goals of the experiment include tests of the theory of the helical cooling channel and the helical solenoid implementation of it, verification of the simulation programs, and a demonstration of effective six-dimensional cooling of a muon beam. We report the status of the experiment and in particular, the proposal to have MANX follow MICE at the Rutherford-Appleton Laboratory (RAL) as an extension of the MICE experimental program. We describe the economies of such an approach which allow the MICE beam line and much of the MICE apparatus and expertise to be reused.