Bonn 2010 – wissenschaftliches Programm
HK 48.1: Vortrag
Donnerstag, 18. März 2010, 14:00–14:15, HG VIII
The GSI Event-Driven TDC with 4 Channels GET4 — •Harald Deppe and Holger Flemming — GSI Helmholtzzentrum für Schwerionenforschung GmbH, Experiment Elektronik ASIC-Design, Darmstadt, Germany
The GSI Event-driven TDC GET4 is the first prototype of a high resolution low power event driven TDC for the CBM-Time of Flight detector readout. The design specifications according to the CBM-ToF requirements are a very high time resolution of better than 25 ps and a double hit resolution of less than 5 ns. The TDC has to cope with an event rate of up to 100 kHz per channel. The time core architecture is based on a Delay Lock Loop followed by a clock driven hit register. For the event handling derandomistion units adapted from FiFo’s are implemented and the readout is controlled by a token ring structure. The serialized data transmission could cover different event types like data, error or synchronisation events. The ASIC was submitted in October 2008 and is presently under test at GSI Darmstadt.