Test of the Optosystem for the ATLAS ITk data transmission chain

Abstract

After Run III the ATLAS detector will undergo a series of upgrades to cope with the harsher radiation environment and increased number of proton interactions in the High Luminosity LHC. One of the key projects in this suite of upgrades is the ATLAS Inner Tracker (ITk). The pixel detector of the ITk must be read out accurately and with extremely high rate. The Optosystem performs electrical-to-optical conversion of signals from the pixel modules. We present a general overview on the design of the Optosystem and recent results related to the performance of the data transmission chain, pivoted on the Optoboards, and to the radiation hardness of the ASICs housed on it.

The Optosystem: validation and testing of the high-speed electro-optical conversion system for the readout of the ATLAS ITk Pixel upgrade

“…Another test is the operation of an Optoboard during irradiation. Results of irradiation tests on previous versions of the Optosystem have been presented in [17,18].…”