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T: Teilchenphysik

T 205: Trigger und DAQ II

T 205.6: Talk

Tuesday, March 11, 2003, 15:15–15:30, SFO4

Study of an alternative TPC readout electronics with Time-to-Digital Converters. — •Alexander Kaukher¹, Holger Fleckenstein¹, Henning Schröder¹, Rainer Wurth², Nabil Ghodbane², Markus Hamann², Thorsten Kuhl², Thorsten Lux³, Felix Sefkow², and Peter Wienemann² — ¹University of Rostock, Rostock, Germany — ²DESY, Hamburg, Germany — ³University of Hamburg, Hamburg, Germany

The packing density of the readout electronics based on Flash-ADCs for existing Time-Projection-Chambers (TPC) is at least an order of magnitude smaller than foreseen for the TESLA TPC. We study an alternative solution, which is based on a Time-to-Digital Converter (TDC) and a charge-to-time conversion technique. The possibility to apply this technique using the ASDQ-preamplifier was studied and multi-hit resolution requirements for the TDC were derived from simulation.

The readout electronics based on the TDCs as a very compact and cheap solution may provide reduced data flow and simple data representation format. This readout architecture would allow to use a larger number of readout channels, hence would improve the momentum resolution of the TPC.