Commissioning of SLAC SLD 45-Degree Chambers

TL;DR

This paper details the commissioning and software upgrade of the 45-degree chambers in the SLAC SLD Warm Iron Calorimeter, enhancing muon tracking coverage and improving data analysis methods.

Contribution

It introduces the completion of the chamber geometry and a new approach to handling multiple scattering effects in the tracking software.

Findings

Improved muon tracking coverage near the gap region.

Successful integration of the 45-degree chambers into the calorimeter system.

Enhanced tracking software with better multiple scattering treatment.

Abstract

The SLD experiment at the Stanford Linear Accelerator Center had a significant gap in its muon tracking coverage, provided by the Warm Iron Calorimeter. Supplemental planes of limited streamer tube chambers were added to improve the coverage in the vicinity of the gap at 0.65 < |cos(theta)|< 0.85. A software effort to upgrade the tracking software for this system is detailed. The commissioning of the forty-five degree chamber region of the SLAC SLD Warm Iron Calorimeter is presented. This task involved the completion of the forty-five degree chamber region geometry for the Warm Iron Calorimeter's fitter and swimmer and the changing of the way multiple scattering effects are treated in the fitter algorithm.