Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 61: Methods in Particle Physics III (Tracking)

T 61.4: Vortrag

Mittwoch, 2. April 2025, 17:00–17:15, VG 4.101

Track Based Software Alignment using the General Triplet Track Fit — •David Fritz, Tamasi Kar, Abhirikshma Nandi, and André Schöning — Physikalisches Institut, Universität Heidelberg, Germany

Modern particle physics experiments require very high precision and the accurate alignment of tracking detectors. While optical surveillance systems provide an initial reference, track-based software alignment is essential for achieving optimal physics performance.

A new alignment procedure based on the General Triplet Track Fit (GTTF) [1] is introduced, enabling the simultaneous determination of track and alignment parameters. The GTTF is a novel, non-iterative, triplet-based track fit that accounts for both hit uncertainties and multiple scattering effects. Its high parallelizability and scalability make it particularly well-suited for online alignment using hardware accelerators such as FPGAs or GPUs.

This talk will provide an overview of the GTTF-based alignment in the context of standard track based alignment procedures. Additionally, results from the GTTF-based alignment for a use case - the Mu3e Pixel Detector - will also be presented.

[1] A. Schöning, 2024, A General Track Fit based on Triplets, arXiv:2406.05240

Keywords: Alignment; Reconstruction; Triplet; Multiple Scattering; Hit Uncertainties