LHCb VELO software alignment, Part III: the alignment of the relative sensor positions

TL;DR

This paper presents a method and software implementation for aligning silicon sensors within modules of the LHCb Vertex Locator, achieving a precision of 1.3 microns through simulation studies.

Contribution

It introduces a new data-driven alignment method for silicon sensors and discusses its software implementation within the LHCb VELO system.

Findings

Achieves 1.3 micron alignment precision in simulations

Demonstrates effective software implementation of the alignment method

Validates the approach through Monte Carlo studies

Abstract

The LHCb Vertex Locator contains 42 silicon sensor modules. Each module has two silicon sensors. A method for determining the relative alignment of the silicon sensors within each module from data is presented. The software implementation details are discussed. Monte-Carlo simulation studies are described that demonstrate an alignment precision of 1.3 micron is obtained in the sensor plane.