OnlineLectures

ASP Online Seminars: Performance of the High-Angle Time Projection Chambers in the Upgraded T2K Near Detector

by Samira Hassani (Université Paris-Saclay (FR))

Tuesday 24 Mar 2026, 13:00 → 14:30 UTC

Description

Abstract:

The off-axis magnetic near detector of the T2K experiment has undergone a significant upgrade, including the construction and installation of two new Time Projection Chambers featuring innovative resistive Micromegas technology and a field cage composed of thin composite walls. This presentation provides a detailed description of the new components of the chambers. Additionally, it reports the results of extensive testing using both neutrino beams and cosmic rays, with comparisons between data and Monte Carlo simulations. The new detectors achieve improved spatial resolution and enhanced particle identification capabilities which are crucial for the precision goals of the T2K experiment.

Bio of the speaker:

Dr. Samira Hassani has been a research staff member in the Particle Physics Division at CEA-Saclay (Institut de Recherche sur les Lois Fondamentales de l’Univers, IRFU) since 2004. She received her Master’s degree in Theoretical Physics from Mohamed First University in Morocco in 1998 and obtained her Ph.D. in Particle Physics from Paris-Saclay University in 2002. She was awarded a grant from the European Research Council and serves on several review committees. She was previously Vice-Director of the Pheniics Doctoral School at Paris-Saclay University and has supervised numerous Ph.D. students and postdoctoral researchers. She is also a Professor of Particle Physics at CentraleSupélec.

Dr. Samira Hassani spent many years as a member of the ATLAS collaboration at CERN, where she contributed to several stages of the experiment, from simulation and commissioning to data analysis. Her work included the development of reconstruction algorithms for muon detection in the muon spectrometer. Within ATLAS, she served as convener of the B-Physics Working Group and contributed to several analyses involving the Higgs boson and diboson processes.

Since 2019, she has been working in the field of neutrino physics within the T2K collaboration. She currently leads the long-baseline neutrino experiment team at CEA-Saclay and coordinates the TPC group. She has contributed to the design, installation, and performance studies of the High-Angle TPC detectors developed for the ND280 near-detector upgrade of the T2K experiment. She is also co-convener of the CC0π analysis group.