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Magnetization Characterization Study for the Energy Saver/Doubler Dipoles

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2 Author(s)
McInturff, A.D. ; Fermi National Accelerator Laboratory Batavia, Illinois 60510 ; Gross, D.

One of the challenging problems in superconducting accelerator dipoles is their dynamic behavior under ramping magnetic field produced loads. Their behavior can be observed with hysteretic measurement of the energy flow in the magnet. This technique, first described in detail by M.N.Wilson, will determine changes in inductance, deflection of coils, dynamic losses, the superconducting cable's critical current vs. field and coupling curves, and iron shield saturation reproducibility. These measurements, when cross correlated with integral field, NMR and harmonic data yield a comprehensive characterization of the magnet. Data are presented for several magnets tested in the Magnet Test Facility of Fermilab. Measurements of inductance changes of a few percent and deflections of a few one-one thousandths of an inch are given. These data can now be routinely obtained on a production basis, therefore yielding a more complete characterization of the accelerator dipole's dynamic behavior.

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Nuclear Science, IEEE Transactions on  (Volume:28 ,  Issue: 3 )