The readout chain for the P̄ANDA MVD strip detector

Abstract

The PANDA (antiProton ANnihilation at DArmstadt) experiment will study the strong interaction in annihilation reactions between an antiproton beam and a stationary gas jet target. The detector will comprise different sub-detectors for tracking, particle identification and calorimetry. The Micro-Vertex Detector (MVD) as the innermost part of the tracking system will allow precise tracking and detection of secondary vertices.For the readout of the double-sided silicon strip sensors a custom-made ASIC is being developed, employing the Time-over-Threshold (ToT) technique for digitization and utilize time-todigital converters (TDC) to provide a high-precision time stamp of the hit. A custom-made Module Data Concentrator ASIC (MDC) will multiplex the data of all front-ends of one sensor towards the CERN-developed GBT chip set (GigaBit Transceiver). The MicroTCA-based MVD Multiplexer Board (MMB) at the off-detector site will receive and concentrate the data from the GBT links and transfer it to FPGA-based compute nodes for global event building.

A time-based front-end ASIC for the silicon micro strip sensors of the P̄ANDA Micro Vertex Detector

“…PANDA Strip ASIC (PASTA)Among the many challenges in developing PASTA, one of the most important and characteristic for the PANDA experiment is the demand for a triggerless data acquisition system[6]. In order to provide accurate measurements of both time stamp and charge, a time-based approach has been chosen[7]. The charge information is extrapolated using the Time over Threshold (ToT) technique that offers several advantages with respect to a more standard amplitude measurement.…”