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Cheng, D.W.

Paper Title Page
MO6PFP066 Design and Construction of a 15 T, 120 mm Bore IR Quadrupole Magnet for LARP 280
 
  • 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.

  
MO6PFP067 Magnetic Field Measurements of HD2, a High Field Nb3Sn Dipole Magnet 283
 
  • X. Wang, S. Caspi, D.W. Cheng, H. Felice, P. Ferracin, R.R. Hafalia, J.M. Joseph, A.F. Lietzke, J. Lizarazo, A.D. McInturff, G.L. Sabbi
    LBNL, Berkeley, California
  • K. Sasaki
    KEK, Ibaraki
  
 

Funding: U.S. Department of Energy


The Superconducting Magnet Program at Lawrence Berkeley National Laboratory has designed and tested HD2, a 1 m long Nb3Sn accelerator-type dipole with a 42 mm clear bore. HD2 is based on a simple block-type coil geometry with flared ends, and represents a step towards the development of cost-effective accelerator quality magnets operating in the range of 13-15 T. The design was optimized to minimize geometric harmonics and to address iron saturation and conductor magnetization effects. Field quality was measured during recent cold tests. The measured harmonics are presented and compared to the design values.