The Super Segmented Clover detector has been developed at GSI in a collaboration with the company Eurisys, Strasbourg. It consists of four coaxial Ge detectors of 14 cm (!) length and 7 cm diameter enabling an optimal arrangement with respect to efficiency and spectrometer response. To further improve the Doppler correction capability the detector elements are electrically segmented in radial quarters. Moreover, the segmentation provides a large polarization sensitivity. The main features of the actively collimated Segmented Clover detector are shown in the table below. The quoted energy resolution reflects the Doppler broadening at a recoil velocity of 4 percent.
With its unprecedented qualities the Segmented Clover detector opens up new perspectives for experiments at GSI. High resolution gamma-spectroscopy of radioactive beam nuclei at relativistic energies becomes possible for the first time. Spectroscopy experiments at the Unilac will be much more sensitive.
The Super Segmented Clover is the basis of the VEGA array. To increase the transportation reliability of the array detectors the mechanical design will be improved. Furthermore, all segments will be read-out individually.
Figure 2:Simulated Doppler correction capability of the
Segmented Clover detector.
