81 research outputs found
Search for non-Gaussian events in the data of the VIRGO E4 engineering run
International audienc
Traitement du signal video du lecteur en spirale
Le traitement du signal video comprend la discrimination des impulsions, leur normalisation qui a pour but de s'affranchir des variations du fond, et la détermination de leur centre et de leur hauteur. Cette dernière opération est faite par conversion analogique digitale continue de l'impulsion
Electronic calibration developed for the CMS electromagnetic calorimeter
An electronic system, designed to provide a relative calibration for the readout of the CMS electromagnetic calorimeter (CMS-ECAL), is described. On request, this system injects a pulse at the input of a predetermined group of preamplifiers with preselected amplitude and a shape identical to the one produced by the photodetectors. Several chips, in DMILL 0.8 mu m technology, have been developed for integration on the front-end electronics. We describe the principle, the testing, the measurement of their precision, and radiation hardness. (6 refs)
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