The Layer 0 Inner Silicon Detector of the D0 Experiment

TL;DR

This paper details the design, implementation, and performance of the new Layer 0 silicon detector added to the D0 experiment's existing tracker at Fermilab, enhancing tracking capabilities.

Contribution

It introduces the design and integration of the first inner silicon layer (Layer 0) in the D0 detector, including innovative support and cooling structures.

Findings

Successful installation of Layer 0 with effective tracking performance

Innovative carbon fiber support structure with integrated cooling

Electrical coupling achieved via bonded polyimide circuit

Abstract

This paper describes the design, fabrication, installation and performance of the new inner layer called Layer 0 (L0) that was inserted in the existing Run IIa Silicon Micro-Strip Tracker (SMT) of the D0 experiment at the Fermilab Tevatron collider. L0 provides tracking information from two layers of sensors, which are mounted with center lines at a radial distance of 16.1 mm and 17.6 mm respectively from the beam axis. The sensors and readout electronics are mounted on a specially designed and fabricated carbon fiber structure that includes cooling for sensor and readout electronics. The structure has a thin polyimide circuit bonded to it so that the circuit couples electrically to the carbon fiber allowing the support structure to be used both for detector grounding and a low impedance connection between the remotely mounted hybrids and the sensors.