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Testbeam analysis of biasing structures for irradiated hybrid pixel detectors
No full textJournal of Instrumentation
The International School for Advanced Studies (SISSA), find out more.
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Testbeam analysis of biasing structures for irradiated hybrid pixel detectors
A.G. Rennie, C.M. Buttar, Y. Gao, R. González López, D. Maneuski, E. Pender, Q. Qin, M. Sullivan, J.T. Taylor and K. Wraight
Published 31 January 2025 • © 2025 The Author(s)
Journal of Instrumentation, Volume 20, January 2025
Citation A.G. Rennie et al 2025 JINST 20 P01029
DOI 10.1088/1748-0221/20/01/P01029
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Abstract
Following the Phase-II upgrade during Long Shutdown (LS3), the LHC aims to reach a peak instantaneous luminosity of 7.5× 1034 cm-2 s-1, which corresponds to an average of around 200 inelastic proton-proton collisions per beam-crossing (every 25 ns). To cope with these conditions, the ATLAS Inner Detector will be replaced by a new all-silicon system — the Inner Tracker (ITk). The ITk will be operational for more than ten years, during which time ATLAS is expected to record approximately 4000 fb-1 of data. The ITk's pixel sub-system is based on hybrid pixel modules with new silicon sensors and readout chips. These studies focus on testbeam campaigns undertaken to study the spatial resolution and efficiencies of hybrid pixel detector modules based on the first large-structure prototype front-end readout chip — the RD53A — using planar silicon sensors. These devices have been irradiated to replicate the effect of the high radiation environment present during operation in the ATLAS detector. Results for devices using sensors with different punch-through bias structures and using different readout modes are summarised. Those with sensors incorporating a punch-through bias structure are found to exhibit systematically lower efficiency than those without, as a result of local areas of relative inefficiency around the punch-through dots. Despite this, all devices measured are found to satisfy the requirement of 97% efficiency at Vbias = 400 V after being irradiated to end-of-life fluence
«Preferirebbe buttar via il nome». L’evasione dal principium individuationis del nome e dall’identità in ‘Rubè’ di Borgese
No full textThe paper highlights the remarkable pregnancy, in thematic, ideological, formal and
even structural terms, of names in Rubè (1921), a novel by Giuseppe Antonio Borgese, focusing on
the troublesome relationship that the main character Filippo Rubè establishes with them, leading
to an identity crisis. Capone identifies five modes of using names in Rubè: the escape from the principium
individuationis of the name as an ideological breakout from the chains of a fixed identity; the
intentional modifications of his name made by Rubè in order to avoid his registry and social identity
and, thus, to be able to escape from the duties of ordinary life; the change of the names of the women
loved by Filippo; some irreversible plot twists brought about by proper names; the inability to give
adequate names to blurred feelings. By the analysis of these uses, the author points out how many
times in Rubè not just nomina sunt consequentia rerum, but res sunt consequentia nominum as well
Standard Model Handles and Candles Working Group: Tools and Jets Summary Report
No full text94 pages, LaTeX, many figures. Summary report of the tools and jets parts of the SMHC working group of the Les Houches 2007 workshop "Physics at TeV Colliders", Les Houches, France, 11-29 June, 2007This report summarizes the activity on comparisons of existings tools for the standard model and on issues in jet physics by the SMHC working group during and subsequent to the Workshop "Physics at TeV Colliders", Les Houches, France, 11-29 June, 2007
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