Journal Article

PUBDB-2021-00508

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Mapping the material distribution of a complex structure in an electron beam

Poley, A.-L. (Corresponding author) ; Stolzenberg, U.Extern* ; Schwenker, B.Extern* ; Frey, A.Extern* ; Göttlicher, P.DESY* ; Marinas, C.Extern* ; Stanitzki, M.DESY* ; Stelzer, B.Extern*

2021
Inst. of Physics London

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Please use a persistent id in citations: doi:10.1088/1748-0221/16/01/P01010  doi:10.3204/PUBDB-2021-00508

Report No.: arXiv:2105.10128

Abstract: The simulation and analysis of High Energy Physics experiments require a realisticsimulation of the detector material and its distribution. The challenge is to describe all activeand passive parts of large scale detectors like ATLAS in terms of their size, position and materialcomposition. The common method for estimating the radiation length by weighing individualcomponents, adding up their contributions and averaging the resulting material distribution overextended structures provides a good general estimate, but can deviate significantly from the materialactually present.A method has been developed to assess its material distribution with high spatial resolutionusing the reconstructed scattering angles and hit positions of high energy electron tracks traversingan object under investigation. The study presented here shows measurements for an extendedstructure with a highly inhomogeneous material distribution. The structure under investigation isan End-of-Substructure-card prototype designed for the ATLAS Inner Tracker strip tracker — aPCB populated with components of a large range of material budgets and sizes.The measurements presented here summarise requirements for data samples and reconstructedelectron tracks for reliable image reconstruction of large scale, inhomogeneous samples, choicesof pixel sizes compared to the size of features under investigation as well as a bremsstrahlungcorrection for high material densities and thicknesses.

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Contributing Institute(s):

1. Analog-Elektronik Entwicklung (FEB)
2. Koordination Elektronik Entwicklung (FE)
3. LHC/ATLAS Experiment (ATLAS)

Research Program(s):

1. 622 - Detector Technologies and Systems (POF4-622) (POF4-622)

Experiment(s):

1. DESY: TestBeamline 21 (DESY II)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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