Peer-reviewedarXiv licenceJINST
Mitigating Sensor Cracking using the Interposer Strategy in the ATLAS ITk Strip Detector
Abstract
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 as an interposer, are added to the module stack-up to decouple thermal stresses. This paper discusses the interposer design and its implementation in the ATLAS ITk Strip barrel, including material tests to validate the additional components, the development of new processes to integrate the new layers into the module assembly workflow, results from design validation and quality control testing of prototype interposed modules, and studies indicating that the new design significantly reduces the thermal stress experienced by the sensor. Tests of prototype support structures loaded with interposed modules have shown no sensor fractures in the relevant temperature range for operation in ATLAS, resulting in the adoption of the interposer strategy as the primary sensor cracking mitigation in the ATLAS ITk Strip barrel.
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BibTeX
@article{abidi2026mitigating,
title = {{Mitigating Sensor Cracking using the Interposer Strategy in the ATLAS ITk Strip Detector}},
author = {Syed Haider Abidi and Kirsten Marty Affolder and Anthony Allen Affolder and Soren Ahrens and Torsten Paul Ake Kesson and Theodoros Alexopoulos and Camron Stephen Alley and Philip Allport and Eric Christopher Anderssen and Egor Antipov and Ludovica Aperio Bella and Aram Apyan and Jean-Francois Arguin and Spyridon Argyropoulos and Dario Ariza and Jan-Hendrik Arling and William Ashmanskas and Karl Sten Vilhelm Astrand and Siemen Henning Aulich and Muzaffer Badem and João Barreiro Guimarães da Costa and Marta Baselga and Matthew Joseph Basso and Lukas Bauckhage and Lukas Tim Bayer and Scott Lee Beaupre and Graham Beck and Kathrin Becker and Michael Begel and Annika Behrendt and Carl Beichert and Casey Dominik Bellgraph and Ilyas Benaoumeur and Kees Christian Benkendorfer and José Bernabéu and Peter Berta and Adrian John Bevan and Nils Bingefors and Tobias Bisanz and Ingo Bloch and Andrew Blue and Cesar Augusto Boldrini and Paul Booker and Liam Boynton and Lydia Brenner and Richard Brenner and Hayden Bronson and Ashley Jammel Brooks and Jan Broz and Laura Elaine Bruce and Ben Brüers and Jakub Bucko and Jedrzej Adam Bukowski and Mengke Cai and Michael Andrew Cairo and Daniel Camarero Munoz and Hongfei Cao and Pietro Cappelli and Edson Carquin and Isabel Beth Carr},
journal = {JINST},
year = {2026},
month = sep,
doi = {10.1088/1748-0221/21/09/p09052},
eprint = {2609.10891},
archivePrefix = {arXiv},
url = {https://hal.science/hal-05759393v1},
}
RIS
TY - JOUR
TI - Mitigating Sensor Cracking using the Interposer Strategy in the ATLAS ITk Strip Detector
AU - Syed Haider Abidi
AU - Kirsten Marty Affolder
AU - Anthony Allen Affolder
AU - Soren Ahrens
AU - Torsten Paul Ake Kesson
AU - Theodoros Alexopoulos
AU - Camron Stephen Alley
AU - Philip Allport
AU - Eric Christopher Anderssen
AU - Egor Antipov
AU - Ludovica Aperio Bella
AU - Aram Apyan
AU - Jean-Francois Arguin
AU - Spyridon Argyropoulos
AU - Dario Ariza
AU - Jan-Hendrik Arling
AU - William Ashmanskas
AU - Karl Sten Vilhelm Astrand
AU - Siemen Henning Aulich
AU - Muzaffer Badem
AU - João Barreiro Guimarães da Costa
AU - Marta Baselga
AU - Matthew Joseph Basso
AU - Lukas Bauckhage
AU - Lukas Tim Bayer
AU - Scott Lee Beaupre
AU - Graham Beck
AU - Kathrin Becker
AU - Michael Begel
AU - Annika Behrendt
AU - Carl Beichert
AU - Casey Dominik Bellgraph
AU - Ilyas Benaoumeur
AU - Kees Christian Benkendorfer
AU - José Bernabéu
AU - Peter Berta
AU - Adrian John Bevan
AU - Nils Bingefors
AU - Tobias Bisanz
AU - Ingo Bloch
AU - Andrew Blue
AU - Cesar Augusto Boldrini
AU - Paul Booker
AU - Liam Boynton
AU - Lydia Brenner
AU - Richard Brenner
AU - Hayden Bronson
AU - Ashley Jammel Brooks
AU - Jan Broz
AU - Laura Elaine Bruce
AU - Ben Brüers
AU - Jakub Bucko
AU - Jedrzej Adam Bukowski
AU - Mengke Cai
AU - Michael Andrew Cairo
AU - Daniel Camarero Munoz
AU - Hongfei Cao
AU - Pietro Cappelli
AU - Edson Carquin
AU - Isabel Beth Carr
PY - 2026
DA - 2026/09/09
JO - JINST
DO - 10.1088/1748-0221/21/09/p09052
UR - https://hal.science/hal-05759393v1
AB - 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 as an interposer, are added to the module stack-up to decouple thermal stresses. This paper discusses the interposer design and its implementation in the ATLAS ITk Strip barrel, including material tests to validate the additional components, the development of new processes to integrate the new layers into the module assembly workflow, results from design validation and quality control testing of prototype interposed modules, and studies indicating that the new design significantly reduces the thermal stress experienced by the sensor. Tests of prototype support structures loaded with interposed modules have shown no sensor fractures in the relevant temperature range for operation in ATLAS, resulting in the adoption of the interposer strategy as the primary sensor cracking mitigation in the ATLAS ITk Strip barrel.
ER -