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Open Access Publications from the University of California

Test of the High-Field $\hbox{Nb}_{3}\hbox{Sn}$ Dipole Magnet HD3b

  • Author(s): Marchevsky, M
  • Caspi, S
  • Cheng, DW
  • Dietderich, DR
  • DiMarco, J
  • Felice, H
  • Ferracin, P
  • Godeke, A
  • Hafalia, AR
  • Joseph, J
  • Lizarazo, J
  • Roy, PK
  • Sabbi, G
  • Salmi, T
  • Turqueti, M
  • Wang, X
  • Prestemon, S
  • et al.

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© 2013 IEEE. We report test results for the one meter long dipol HD3b, a block-Type accelerator quality Nb3Sn magnet built a LBNL with operational bore fields in the range of 13-15 T. Th magnet is an upgrade of the previously reported HD2 and HD3 versions, with several modifications implemented to improve conducto positioning, reduce cable "hard-way" bending radius, an strengthen electrical insulation between cables and coil parts The magnet exhibited long training behavior, but showed a goo "memory" of the trained state upon thermal cycling. Ramp-rat dependence of the quench current, field quality performance characteristics and protection heater studies were conducted. Quenc propagation velocity and quench locations were determined base on the voltage signals; quench localization was further improve using inductive quench antenna and acoustic emission sensors Short-And long-Term acoustic precursors to quenching wer observed.

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