DEMAGNETIZING FACTORS FOR CYLINDERS

Fluxmetric (ballistic) and magnetometric demagnetizing factors N(f) and N(m) for cylinders as functions of susceptibility-chi and the ratio-gamma of length to diameter have been evaluated. Using a one-dimensional model when gamma greater-than-or-equal-to 10, N(f) was calculated for -1 less-than-or-equal-to chi < infinity and N(m) was calculated for chi --> infinity. Using a two-dimensional model when 0.01 less-than-or-equal-to gamma less-than-or-equal-to 50, an important range for magnetometer measurements, N(m) and N(f) were calculated for -1 less-than-or-equal-to chi < infinity. Demagnetizing factors for chi < 0 are applicable to superconductors. For chi = 0, suitable for weakly magnetic or saturated ferromagnetic materials, N(f) and N(m) were computed exactly using inductance formulas.