Overview

The ability to calibrate the D0 calorimeter electronics is of prime importance to determine with optimal precision the energy of a particle.  In order to perform precision measurements such as the W mass, variations of the calorimeter response as a function of position should be kept as small as possible.  There are various sources in the electronics for variations in channel-to-channel response, such as the tolerance of the preamplifier feedback capacitor, the gain sensitivity to temperature or the non-linearity of the response, that the on-line electronic calibration has to correct for.

We aim at controlling the electronics calibration chain to better than 2%.   The method used to calibrate the electronics involves supplying a precise charge pulse of known value to each preamp input in a repeatable manner.  The level of charge must be adjustable to cover the entire dynamic range of the electronic.  The charge delivered to the preamp serves as both a calibration signal and an indicator of the functionality of each channel.

Modifications
Calibration System

Visit our French Collaborators' page for more information on the pulser system