In order to reconstruct gamma-gamma physics events tagged with High Energy Tagger (HET) in the KLOE-2 (K LOng Experiment 2), we need to measure the Time Of Flight (TOF) of the electrons and positrons from the KLOE-2 Interaction Point (IP) to our tagging stations (11 m apart). The required resolution must be better than the bunch spacing (2.7 ns). We have developed and implemented on a Xilinx Virtex-5 FPGA a Time to Digital Converter (TDC) with 625 ps resolution (LSB) along with an embedded data acquisition system and the interface to the online FARM of KLOE-2. We will describe briefly the architecture of the TDC and of the Data AcQuisition (DAQ) system. Some more details will be provided about the zero-suppression algorithm used to reduce the data throughput.
@article{arxiv.1205.6663,
title = {FPGA-based Time to Digital Converter and Data Acquisition system for High Energy Tagger of KLOE-2 experiment},
author = {L. Iafolla and A. Balla and M. Beretta and P. Ciambrone and M. Gatta and F. Gonnella and M. Mascolo and R. Messi and D. Moricciani and D. Riondino},
journal= {arXiv preprint arXiv:1205.6663},
year = {2015}
}
Comments
Submitted to proceedings of the 12th Pisa Meeting on Advanced Detectors 2012, La Biodola, Isola d'Elba, Italy