Testing and Qualification of Low Voltage Power Supplies for the ATLAS Tile Hadronic Calorimeter Phase-II Upgrade

In preparation of the High Luminosity Large Hadron Collider (HL-LHC) era, the ATLAS experiment at the Large Hadron Collider (LHC) Tile Hadronic Calorimeter has developed reliable, low-noise, and radiation-tolerant low voltage power supplies (LVPS) for the front-end detector electronics. The University of Texas at Arlington is responsible for the radiation studies, the test stand development, and burn-in process for quality control testing. The experience of designing and testing these LVPS will be discussed with focus on major areas of development for the ATLAS Phase-II upgrade. Each brick converts high-voltage input into stable, low-voltage output while maintaining efficiency and thermal stability, and operating in a high radiation environment. Our current work focuses on improving production consistency and fault detection in the LVPS through automated testing and performance analysis. These developments mark an important step toward scalable, highly-reliable LVPS deployment across the ATLAS detector, ensuring consistent performance during the HL-LHC era.