Charge transfer properties through graphene for applications in gaseous detectors
Date
2016-07-11
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
Graphene is a single layer of carbon atoms arranged in a honeycomb lattice with remarkable mechanical and electrical properties. Regarded as the thinnest and narrowest conductive mesh, it has drastically different transmission behaviours when bombarded with electrons and ions in vacuum. This property, if confirmed in gas, may be a definitive solution for the ion back-flow problem in gaseous detectors. In order to ascertain this aspect, graphene layers of dimensions of about 2 x 2 cm(2), grown on a copper substrate, are transferred onto a flat metal surface with holes, so that the graphene layer is freely suspended. The graphene and the support are installed into a gaseous detector equipped with a triple Gaseous Electron Multiplier (GEM), and the transparency properties to electrons and ions are studied in gas as a function of the electric fields. The techniques to produce the graphene samples are described, and we report on preliminary tests of graphene-coated GEMs.
Description
Keywords
Instruments & instrumentation, Nuclear science & technology, Physics, Graphene, Micro-pattern gaseous detectors, GEM, Ion back-flow, Carbon, Charge transfer, Electric fields, Electron multipliers, Gas detectors, Gems, Honeycomb structures, Ions, Charge transfer properties, Copper substrates, Gaseous detectors, Gaseous electron multipliers, Honeycomb lattices, Mechanical and electrical properties, Transparency properties
Citation
Franchino, S. vd. (2016). "Charge transfer properties through graphene for applications in gaseous detectors". Nuclear Instruments and Methods in Physics Research, Section A- Accelerators, Spectrometers, Detectors and Associated Equipment, 824, 571-574.