Author/Authors :
Baek، نويسنده , , Y and Boget، نويسنده , , D and David، نويسنده , , P.Y and Ditta، نويسنده , , J and Hermel، نويسنده , , V and Fouque، نويسنده , , N and Mendiburu، نويسنده , , J.P and Nedelec، نويسنده , , P and Peigneux، نويسنده , , J.P. and Poireau، نويسنده , , V and Rebecchi، نويسنده , , P and Sillou، نويسنده , , D، نويسنده ,
Abstract :
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 μm 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.
