TY  - JOUR
AU  - Poley, Anne-Luise
AU  - Stolzenberg, Ulf
AU  - Schwenker, Benjamin
AU  - Frey, Ariane
AU  - Göttlicher, Peter
AU  - Marinas, Carlos
AU  - Stanitzki, Marcel
AU  - Stelzer, Bastian
TI  - Mapping the material distribution of a complex structure in an electron beam
JO  - Journal of Instrumentation
VL  - 16
IS  - 01
SN  - 1748-0221
CY  - London
PB  - Inst. of Physics
M1  - PUBDB-2021-00508
M1  - arXiv:2105.10128
SP  - P01010
PY  - 2021
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000608273000010
DO  - DOI:10.1088/1748-0221/16/01/P01010
UR  - https://bib-pubdb1.desy.de/record/454434
ER  -