Abstract

A new type magnetic spectrograph for charged-particle nuclear-reaction studies has been put into operation in conjuction with the Heidelberg MP-Tandem Van de Graaff accelerator. The main elements of the spectrograph are a quadrupole magnet and three dipoles (deflecting magnets). It is therefore called the QDDD or Q3D spectrograph. The instrument has an acceptance solid angle of 13 msr, a range E max/ E min = 1.21 and a resolving power of the order of p/ Δp = 10 4. Other features of the instrument include a multipole used for magnetic correction of kinematic broadening and other aberrations and an electrostatic deflector for separation of particles according to their specific mass m/ q.

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