The PhD defence and trial lecture will be streamed. The chair of the defence will moderate the disputation.
Ex auditorio questions: the chair of the defence will invite the audience physically present in the auditorium to ask ex auditorio questions.
→ Live streaming of trial lecture and disputation
→ Request for thesis copy (available until the disputation starts)
Trial lecture
Time and place: October 8, 2026 - 10:15 AM
Lille fysiske auditorium (V232) - Fysikkbygningen
Title: "Superconductivity and its applications"
Main research findings
The Large Hadron Collider (LHC) is being upgraded to the High-Luminosity LHC. To cope with the increased luminosity, the ATLAS Inner Detector will be replaced by the all-silicon Inner Tracker (ITk). A thermal cycling study was conducted to ensure the robustness against temperature variations of the detector modules. Hybrid pixel detectors from three vendors were tested and showed no significant degradation after 100 thermal cycles. This study led to the qualification of the vendors to produce detector modules for ITk.
Looking towards future accelerator experiments, increased timing resolution will be required. In pursuit of developing a thin sensor with timing resolution below 100 ps, the CASSIA project aims to develop a monolithic pixel sensor with internal amplification. The thesis presents a study of how design parameters affect device performance of the first CASSIA prototype. The study shows that dark count rates are highly dependent on sensor design, and the best-performing structures exhibit values promising for high-energy physics applications.
These studies have been used to design the next version of CASSIA, the CASSIA2 chip, bringing us one step closer to the next generation of precision tracking and timing detectors for future high-energy physics experiments.
Adjudication Committee
- Dr. Christopher Betancourt, Smart Sensors and Microsystems, SINTEF, Norway
- Dr. Dominik Dannheim, Department of Experimental Physics (EP), CERN, Switzerland
- Professor Larissa Bravina, Department of Physics, University of Oslo, Norway
Supervisors
- Professor Heidi Sandaker, Department of Physics, University of Oslo, Norway
- Dr. Heinz Pernegger, EP Department, CERN, Switzerland
Chair of defence
Associate Professor Tor Ole Bigton Odden, Department of Physics, University of Oslo, Norway
Candidate contact information
Email: jenny.lunde@cern.ch
Contact information to Department: Line Trosterud Resvold