Abstract
The superconducting magnet CELLO was tested with currents up to 3200 A at Saclay and has been installed at DESY in Hamburg where it will be used for particle physics experiments requiring colliding beams of electrons and positrons. The testing of this unique, large, one-layer solenoid provides an excellent opportunity to evaluate the theory of quench propagation under adiabatic conditions, that is, in a coil in which the conductors are not in direct contact with helium. In an early test of this coil, quenches occurred as a result of a broken conductor. This report describes the quenches that occurred, gives the details of the damaged conductor, and includes an analysis of the quenches. Observed axial quench velocities are compared to the calculated values based on both measurements and calculations of the thermal conductivity of the fabricated coil. The coil and conductor dimensions and characteristics are given in Table I The coil and conductor are shown in Fig. 1, and a complete description can be found elsewhere[1].
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Hassenzahl, W.V. (1980). Quenches in the Superconducting Magnet Cello. In: Timmerhaus, K.D., Snyder, H.A. (eds) Advances in Cryogenic Engineering. Advances in Cryogenic Engineering, vol 35 A. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-9856-1_21
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DOI: https://doi.org/10.1007/978-1-4613-9856-1_21
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