  A Mini-Orange spectrometer used for in-beam measurements of internal
conversion electrons, which consists of a Si(Li) detector and different sets of
SmO$_5$ permanent magnets for filtering and transporting the conversion
electrons to the Si(Li) detector, has been developed at China Institute of
Atomic Energy. The working principle and configuration of the Mini-Orange
spectrometer are described. The performance of the setup is illustrated by
measured singles conversion electron spectra using the Mini-Orange
spectrometer.
