Power distribution board: Quality control, quality assurance and testing

Abstract

During the second Large Hadron Collider Long Shutdown, the Liquid Argon calorimeter of the ATLAS experiment at CERN has been upgraded with a new trigger readout electronics which provides digital information with higher granularity to the ATLAS trigger system. In particular, the new LAr Trigger Digitizer Boards will process and digitize the "Super Cells" (group of readout calorimeters cells) and send the processed data to the back-end electronics. The Power Distribution Board is a mezzanine board that provides the power distribution to the LTDB. Before being installed inside the detector these mezzanines must be tested for proper operation, particularly the proper functioning of the voltage regulators that are used to deliver the correct supply voltage. This article will show and discuss the control tests performed on the power distribution boards.