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v3.3.3
Room 50B-4205
and zoom: https://lbnl.zoom.us/j/94822510608
Abstract:
As one of the largest and most ambitious silicon detector projects ever attempted, the ATLAS ITk is a collaborative effort between a large number of institutions spread across many countries. Alongside developing reliable and repeatable production methods, it is critical for future analyses that the various factor influencing detector performance are validated, and correctly implemented in Monte-Carlo simulations. One important aspect is the material content of the detector, which has a substantial impact on b-tagging and vertexing resolution due to multiple scattering and hadronic interactions, and is generally only verified using detector data post-commissioning.
One of several sites that load assembled modules onto support structures, the Oxford Physics Microstructure Detector laboratory (OPMD) has developed robotic construction methods for the outer-endcap half-rings. This seminar will give an overview of the progress made toward production, and will also explore a series of testbeams that utilise multiple scattering of low-energy positrons to measure 2D maps of the fractional radiation length x/X0 of detector components to sub-mm resolution during the R&D phase. A measurement of an ITkPix quad module will be presented, and an outlook will be given on the feasibility of measuring large areas quickly and efficiently with such a technique.