Momentum measurements in nuclear emulsions exposed in a megagauss field

Abstract

Although the generation of a megagauss magnetic field inevitably destroys the field-producing coil, the explosion is radial, permitting nuclear emulsions to be exposed in the field without physical damage. We report on the measurements of particle momenta by track curvature in nuclear emulsions exposed to a pulse of electrons from the Stanford Linear Accelerator while in a 0.92 MG field. The errors in the curvature measurements are accounted for by the effects of multiple Coulomb scattering alone. The rms error is given by the expression σ(ϱ)/ϱ = 2.5 l − 1 2 , curvature, is based.