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The construction and experimental results of a novel compact anti-Compton spectrometer system are reported. The device consists of a large BGO scintillation crystal with a cylindrical well. Inside the well, a 56 mm diameter, 57 mm high (n-type) germanium crystal is mounted. The entire assembly is cooled down to 104 K. Scintillation light from the BGO crystal is detected by a 127 mm diameter PM tube. The assembly has the advantage of a compact design and the absence of any material between the Ge and the BGO crystal. A peak-to-total ratio of 0.60 is obtained with a /sup 60/Co source and 0.74 with a /sup 137/Cs source. >

The new scanning microprobe has been in operation for two years. real time data acquisition takes place on a front end system. The measured data is transported via Ethernet to a workstation for online monitoring, analysis and storage. Hardware for control of the scan magnet and the quadrupoles and a multichannel analyzer have been developed. Data acquisition software for online monitoring and simultaneous display of multiple spectra with user selectable parameters has been written. The user interface is based on the X11-Window system. A relational database gives the user a flexible way to specify all parameters for the experiment. A faster datalink and a faster workstation will be realized this year.