Garfield++/LTSpice simulation of straw tube response for different readout electronics models of the SPD Straw Tracker

Dedicated simulation studies are being conducted to predict performance of the Straw Tracker in the SPD experiment. Garfield++ package allows us to model signals from the individual Tracker elements, straw tubes. LTSpice software models response of an analogue electronic circuit to a given input signal. Straw tube signals generated with Garfield++ are used as an input to the straw readout electronics models to study influence of different readout electronics parameters on the Straw Tracker performance. The obtained dependence of the straw signal time and charge resolution on different parameters, such as preamplifier peaking time and the discriminator threshold are presented.