A magnetic spectrometer system for on-line studies of β rays and internal conversion electrons of short-lived mass-separated activities

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Abstract
A π√2 high‐resolution magnetic spectrometer has recently become operational at the TRISTAN on‐line isotope separator facility. The design and operational modes of the spectrometer have been developed especially for on‐line studies of short‐lived mass‐separated fission product activities. The spectrometer configuration is described, with particular emphasis on the magnetic field control and stabilization, the data collection modes and techniques developed to study nonequilibrium source activities, and the stabilization of the ion‐beam deposit position by use of a split‐tape ion‐beam collector.