12–17 Oct 2015
Trieste - Italy
Europe/Rome timezone

Charge Transfer Properties Through Graphene for Applications in Gaseous Detectors

14 Oct 2015, 10:25
15m
Oceania (Trieste - Italy)

Oceania

Trieste - Italy

Congress Centre Stazione Marittima Molo Bersaglieri, 3 34123 Trieste Italy
Board: 23
Oral contribution New Developments in MPDGs Contributed talks

Speaker

Mr Filippo Resnati (ETHZ / CERN)

Description

Graphene is a single layer of carbon atoms arranged in a honeycomb lattice with remarkable mechanical, electrical and optical properties. It can be regarded as the thinnest and narrowest conductive mesh with a strong asymmetry for the transmission of low energetic electrons and ions. Graphene layers with an area of the order of a few cm^2 were transferred onto metal support structures with holes of diameters from 30 um to 70 um and pitches of the order of twice the hole diameter, so that the graphene layers were freely suspended in the holes. The samples were installed into a gaseous detector equipped with a triple Gas Electron Multiplier (GEM), and the transparency of the graphene to electrons and ions was studied in gas as a function of the electric fields applied. We describe the transfer techniques of the graphene layers from the substrate to the experimental setup as well as the procedures to measure the charge transfer properties. Results will be presented with special attention to the challenges arising from defects in the graphene layers. We furthermore describe solutions to study the intrinsic transmission properties of this material and discuss applications where these techniques can be used to improve the state of the art of gaseous detectors.

Primary authors

Patrik Thuiner (CERN, Vienna University of Technology) Thuong Thuong Nguyen (University College London)

Co-authors

Christina Streli (Technische Universität Wien) Dr Diego Gonzalez-Diaz (GSI and Tsinghua University) Ms Dorothea Pfeiffer (European Spallation Source/CERN) Eraldo Oliveri (CERN) Mr Filippo Resnati (ETHZ / CERN) Hans Müller (CERN) Joseph Alexander Smith (University College London) Leszek Ropelewski (CERN) Miranda Van Stenis (CERN) Dr Richard Hall-Wilton (European Spallation Source ESS AB) Richard Jackman (University College London) Rob Veenhof (RD51) Rui De Oliveira (CERN) Silvia Franchino (CERN)

Presentation materials