Lycoris -- a large-area, high resolution beam telescope

TL;DR

Lycoris is a high-resolution, large-area beam telescope designed for test beam facilities, providing precise particle tracking and performance evaluation of sensors over a significant active area.

Contribution

The paper introduces Lycoris, a novel six-plane beam telescope with a large active area and high resolution, utilizing a silicon sensor originally designed for the ILC, with performance tested in test-beam campaigns.

Findings

Achieved an average single-point resolution of 7.07 micrometers.

Demonstrated the system's capability in test-beam campaigns at DIITBF.

Validated the performance of the silicon sensor in a beam telescope setup.

Abstract

A high-resolution beam telescope is one of the most important and demanding infrastructure components at any test beam facility. Its main purpose is to provide reference particle tracks from the incoming test beam particles to the test beam users, which allows measurement of the performance of the device-under-test (DUT). \LYCORIS, a six-plane compact beam telescope with an active area of $\sim$10$\times$\SI{10}{\square\centi\metre} (extensible to 10$\times$\SI{20}{\square\centi\metre}) was installed at the \DIITBF in 2019, to provide a precise momentum measurement in a \SI{1}{\tesla} solenoid magnet or to provide tracking over a large area. The overall design of \LYCORIS will be described as well as the performance of the chosen silicon sensor. The \SI{25}{\micro\metre} pitch micro-strip sensor used for \LYCORIS was originally designed for the \SID detector concept for the International Linear Collider. It adopts a second metallization layer to route signals from strips to the bump-bonded \KPIX ASIC and uses a wire-bonded flex cable for the connection to the DAQ and the power supply system. This arrangement eliminates the need for a dedicated hybrid PCB. Its performance was tested for the first time in this project. The system has been evaluated at the \DIITBF in several test-beam campaigns and has demonstrated an average single-point resolution of \SI{7.07}{\micro\meter}.