We have developed a fast programmable trigger processor board based on a field programmable gate array and a complex programmable logic device for use in the BELLE experiment. The trigger board accommodates 144 ECL input signals, 2 NIM input signals, 24 ECL output signals, and the VME bus specification. An asynchronous trigger logic for counting isolated clusters is used. We have obtained trigger latency of 50 ns with a full access to input and output signals via a VME interface. The trigger logic can be modified at any time depending on the experimental conditions.
@article{arxiv.physics/9911050,
title = {A fast programmable trigger for isolated cluster counting in the BELLE experiment},
author = {H. J. Kim and S. K. Kim and S. H. Lee and T. W. Hur and C. H. Kim and F. Wang and I. C. Park and Hee Jong Kim and B. G. Cheon and E. Won},
journal= {arXiv preprint arXiv:physics/9911050},
year = {2007}
}
Comments
15 pages(7 figures), Latex, submitted to Nuclear Instruments and Methods A