Measuring X-ray Fluorescence Emissions Using MOSS

 The ALICE (A Large Ion Collider Experiment) collaboration is working on upgrading the Inner Tracking System 2 (ITS) by replacing the ALPIDE chips of the three most central layers with Monolithic Stitched Sensors (MOSS). The MOSS will bring many improvements to the detector, including: a larger detecting area (10 cm × 26 cm), ultra-thin sensors (≤ 50 μm), and double the pointing resolution. The MOSS also has the ability to measure the energy loss particles experience when passing through the sensors. While this ability will not be used in the upcoming upgrade, the ALICE ITS group is exploring the loss measurements for future detectors. These measurements have consisted of measuring K_α and K_β emissions from ⁵⁵Fe decays and remissions from target elements such as titanium and chlorine. This project continues these measurements by designing and constructing a test setup to measure argon, calcium, and chlorine emissions.