Thomas Johnson

Mitigating Sensor Cracking using the Interposer Strategy in the ATLAS ITk Strip Detector

Syed Haider Abidi, Kirsten Marty Affolder, Anthony Allen Affolder, Soren Ahrens et autres

This paper introduces the strategy of using an interposing layer to mitigate thermal-stress-induced fracturing of silicon sensors in ATLAS ITk Strip modules. This strategy involves a change in the module design in which layers of soft adhesive and a kapton separator, known …

ALICE upgrades during the LHC Long Shutdown 2

S. Acharya, R.A. Hernandez, D. Adamová, Jonatan Adolfsson et autres

Abstract A Large Ion Collider Experiment (ALICE) has been conceived and constructed as a heavy-ion experiment at the LHC. During LHC Runs 1 and 2, it has produced a wide range of physics results using all collision systems available at the LHC. …

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Report on Hydrogen Content Measurements of Yttrium Hydrides

Mahmut Nedim Cinbiz, USDOE Office of Nuclear Energy (NE), Joey A Charboneau, Ian Hobbs et autres

This report describes the hydrogen content measurements of yttrium samples as irradiated at Advanced Test Reactor as part of the Microreactor Program. Irradiated samples were prepared at the facilities of Analytical Research Laboratory (ARL) of Materials and Fuels Complex (MFC). Hydrogen content …

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arXiv : First demonstration of in-beam performance of bent Monolithic Active Pixel Sensors

G. Aglieri Rinella, J. Wikne, M. R. Ersdal, Jory Sonneveld et autres

A novel approach for designing the next generation of vertex detectors foresees to employ wafer-scale sensors that can be bent to truly cylindrical geometries after thinning them to thicknesses of 20-40$\mu$m. To solidify this concept, the feasibility of operating bent MAPS was …

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The STAR MAPS-based PiXeL detector

Giacomo Contin, L. Greiner, Joachim Schambach, Michal Szelezniak et autres

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Taliban Narratives: The Use and Power of Stories in the Afghanistan Conflict

Thomas Howard Johnson, Thomas Johnson

Geometric analysis of enhanced thermal conductivity in epoxy composites: A comparison of graphite and carbon nanofiber fillers

Anne M. Ruminski, Fan Yang, Eun Seon Cho, J. Silber et autres

We analyze the geometric effects of two different carbon fillers on the enhancement of the thermal conductivity of carbon‐epoxy composites. This study compares the thermal properties of composites containing graphite powder (2‐dimensional) and carbon nanofibers (1‐dimensional) incorporated in an industrial epoxy. Calculations …

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The PHENIX Forward Silicon Vertex Detector

C. Aidala, L. Anaya, E. Anderssen, A. Bambaugh et autres

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Design and performance of an R-θ fiber positioner for the BigBOSS instrument

J. Silber, Christoph Schenk, E. Anderssen, C. Bebek et autres

The BigBOSS instrument is a proposed multi-object spectrograph for the Mayall 4m telescope at Kitt Peak, which will measure the redshift of 20 million galaxies and map the expansion history of the universe over the past 8 billion years, surveying 10-20 times …

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ATLAS pixel detector electronics and sensors

G. Aad, M. Ackers, Fabrizio Alberti, M. Aleppo et autres

The silicon pixel tracking system for the ATLAS experiment at the Large Hadron Collider is described and the performance requirements are summarized. Detailed descriptions of the pixel detector electronics and the silicon sensors are given. The design, fabrication, assembly and performance of …

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Titre indisponible

Thomas Johnson

In early 1984, I received a phone call from Mike Marge requesting that I join Mike and Dan Boone in submitting a proposal for a short course presentation on the prevention of voice disorders to be made at the ASHA convention in …

Statistical Methods for the Detection and Analysis of Radioactive Sources

John Klumpp, Alexander Brandl, Thomas Johnson, Georg Steinhäuser et autres

We consider four topics from areas of radioactive statistical analysis in the present study: Bayesian methods for the analysis of count rate data, analysis of energy data, a model for non-constant background count rate distributions, and a zero-inflated model of the sample …