Humboldt-Universität zu Berlin - Mathematisch-Naturwissen­schaft­liche Fakultät - Experimentelle Elementarteilchenphysik

Vergangene Termine

  • 2026-05-21T13:30:00+02:00
  • 2026-05-21T14:30:00+02:00
  • DESY, Villa | SR5, Platanenallee 6, 15738 Zeuthen
Mai 21 Donnerstag 2026

Zeit: 13:30

DESY, Villa | SR5, Platanenallee 6, 15738 Zeuthen

Arstract: Low Gain Avalanche Detectors (LGADs) are a class of silicon sensors designed to provide moderate internal signal amplification (typically a factor of 10-30) through controlled charge multiplication. They incorporate a highly doped gain layer that creates a high electric-field region, where charge carriers undergo impact ionization, resulting in signal amplification. The combination of moderate gain with fast signal rise time enables particle time resolutions on the order of ~30 ps, making LGADs ideal for timing applications. They will be employed in the upcoming LHC Phase II precision timing detectors of the ATLAS and CMS experiments at CERN. In these environments, the sensors are exposed to high radiation fields, which inevitably lead to significant radiation damage. Although LGADs have been optimized for radiation hardness using defect-engineering techniques, they still suffer from performance degradation, primarily due to radiation-induced deactivation of the gain-layer. “he “Gain Layer Project” aims to improve the understanding of the physics mechanisms underlying the degradation. The presentation will introduce the LGAD concept and its application domains, and the main design variations. The fundamentals of radiation damage to silicon detectors will be discussed, along with the characterization techniques used to identify the microscopic defects responsible for the observed macroscopic degradation. In the second part, radiation damage in LGADs will be addressed in more detail, and the Gain Layer Project will be presented. This project focuses on achieving a deeper understanding of the defect-kinetics governing the gain-layer degradation under irradiation.

  • 2026-05-07T13:30:00+02:00
  • 2026-05-07T14:30:00+02:00
Mai 7 Donnerstag 2026

Zeit: 13:30

  • 2026-04-23T13:00:00+02:00
  • 2026-04-23T14:00:00+02:00
April 23 Donnerstag 2026

Zeit: 13:00

  • 2026-01-22T13:00:00+01:00
  • 2026-01-22T14:00:00+01:00
  • Erwin Schrödinger-Zentrum, Rudower Chaussee 26, 12489 Berlin, Raum 0'101
Januar 22 Donnerstag 2026

Zeit: 13:00

Erwin Schrödinger-Zentrum, Rudower Chaussee 26, 12489 Berlin, Raum 0'101

Abstract: Neutrinos are produced copiously at the LHC, with energies ranging from a few hundred GeV up to the TeV scale, complementary to other sources. Until recently, no collider neutrino has ever been directly observed. This talk presents the observation and measurement of collider neutrinos with the FASER detector using the emulsion and electronic detectors. And it shows the latest results, including measurements of the neutrino cross section and flux as functions of the energy and pseudorapidity.