Electrical characterisation of stave prototypes for the ATLAS ITk Strip Detector Upgrade

The ATLAS experiment is currently preparing for an upgrade of the inner tracking detector for High-Luminosity LHC operation, scheduled to start in 2027. The new detector, known as the Inner Tracker or ITk, employs an all-silicon design with five inner Pixel layers and four outer Strip layers. The staves are the building blocks of the ITk Strip barrel layers. Each stave consists of a low-mass support structure which hosts the common electrical, optical and cooling services as well as 28 silicon modules, 14 on each side. A prototype electrical long-strip stave was assembled at BNL in December 2019. To characterize the stave, a set of electrical and functional measurements have been performed both at room and at cold temperature. In this poster, I will present the methods used to characterize this stave with particular focus on noise studies.