Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 18: Instrumentation and Applications II

HK 18.11: Talk

Tuesday, March 9, 2004, 18:00–18:15, C

Performance of the Charge Sensitive VA32TA2 Frontend Chip — •V. Leontyev — Institut für Kernphysik, Forschungszentrum Jülich, Germany

For the Silicon Spectator Tracker of the ANKE spectrometer at COSY Jülich an improved version of the preamplifier chip VA2TA2 has been developed by the Norwegian company ideas. This charge sensitive preamplifier chip provides 32 input channels with a dynamic range either from 0 to 500 fC or 0 to −500 fC. At ANKE the chip has to handle signals from double sided structered 69 µm, 300 µm silicon as well as 5.1 mm thick Si(Li) detectors. With the trigger output, timing information is obtained for each detector side. For the 5.1 mm thick Si(Li) this provides 3D-height information together with the two-dimensional strip-information. The capabilities and performance of the chip will be shown on the basis of laboratory tests and data taken during beam times in August and November of 2003.
This work is supported by the FZJ.