Köln 2025 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 21: Instrumentation VI

HK 21.2: Vortrag

Dienstag, 11. März 2025, 16:15–16:30, SR Exp1B Chemie

A High-Rate, Highly-Segmented Charged Particle Tracker — Devin Hymers¹, •Sebastian Schroeder¹, Olga Bertini², Johann Heuser², Joerg Lehnert², Christian Joachim Schmidt², and Dennis Muecher¹ — ¹Institute for Nuclear Physics, University of Cologne, Cologne, Germany — ²GSI, Darmstadt, Germany

Tracking of charged particles with high spatial resolution, and at high event rates, is of significant interest in many sub-disciplines. Here, we present an adaptation of the high-performance detectors from the Silicon Tracking System of the Compressed Baryonic Matter experiment at GSI, to a general-purpose two-layer tracker. To maximize acceptance, the first layer consists of a 6x6 cm² sensor, while the second layer is a larger 6x12 cm². Each of these double-sided silicon strip detectors is segmented with a 58 µm pitch, for 1024 segments per side, offering a balance between spatial resolution, data rate, and a manageable number of electronic channels.

These sensors are coupled to a fully-digital readout system, currently capable of handling count rates up to 50 kHz per channel, or 100 kHz after a possible hardware upgrade. Tests have been performed tracking particles at rates above 1 MHz, with pileup-related data loss of 0.004%. At these interaction rates, tracking may be performed on the same timescale as data acquisition; on modern workstation hardware, 60 s of such high-rate data was typically reconstructed in 50 s or less using a highly-parallel algorithm. The performance of this system represents a significant opportunity for improvement in measurement and online analysis of particle tracking setups.

Keywords: Particle Tracking; Silicon Strip Detectors; Position Sensitive; High Performance