Speaker
Description
Building a configuration for the ET detector is a challenging task, due to the simultaneous occurrence of long range functional integration among many global functions, and local integration around many nodes of the optical layout. In addition, a high degree of integration occurs among the various co-located detectors and the hosting infrastructure.
The work on advanced ET configuration evolved from a joint ETO-ETC effort since 2023, starting from a first PBS structured on global functions (PBS.1), to the development of a new concept based on system integration (PBS.2) with a practical implementation in the Task Force Baseline Detector Layout (see the talk: Towards a common baselining framework for the Einstein Telescope).
One interesting practical application concerns the evaluation of detector cost, which is currently being pursued within the Geometry Comparison Report. As such exercise is expected comply with ESA costing formats, the full detector decomposition must be confined within three levels only, namely systems, subsystems, and equipment elements. To this purpose the PBS.2 architecture appears to be quite convenient, with most of detector hardware being integrated around the nodes of the optical layout, which helps to control the multiplicity of recurring elements for distributed functions. Following tower categorisation from the Task Force Baseline Detector Layout, nodes of the optical layout are classified into a small number of types, and each node type represents a system in the costing decomposition. The second level of the decomposition follows the systems identified in the PBS.1 structure, which represent the global functions, while the third level is achieved by identification of suitable elements under the PBS.1 branches.
Besides its use for the costing study, such decomposition can be seen as an intermediate step towards the implementation of the final ET configuration, integrating detector and infrastructure.