Magnetic field measurement of the JAERI heavy-ion spectrography 'ENMA'

A new magnetic spectrograph, named ENMA, for heavy-ion reaction studies was constructed. Magnetic field measurements for two dipoles, one quadrupole and three muultipoles, of which the spectrograph consisted in the QMDMDM form, were performed. Almost perfect field distributions were obtained over a full range of the field strength in accordance with the two-dimensional calculation by the programs TRIM and LINDA. The fringing field distribution and the location of the effective field boundaries of the dipole magnets were quite stable against a change of the excitation current. The multipole magnets of the current sheet type were successfully constructed. The field strength of the quadrupole component of the multipole magnet M2 was enough for making the kinematic correction from k=-0.7 to 2.0. (orig.)