Challenges for resistive gaseous detectors towards RPC2014

Abstract

Resistive gaseous detectors can be broadly defined as a sub-type of gaseous detectors that are operated in conditions where virtually no field lines exist that connect any two metallic electrodes sitting at different potential. For most practical purposes, this condition can be operationally realized as 'no gas gap being delimited by two metallic electrodes' [1]. Since early 70's, Resistive Plate Chambers (RPCs) are the most successful implementation of this idea, that leads to fully spark-protected gaseous detectors, with solid state -like reliability at working fields beyond 100kV/cm, yet enjoying the general characteristics of gaseous detectors in terms of flexibility, optimization and customization. We present a summary of the status of the field of resistive gaseous detectors as discussed in a dedicated closing session that took place during the XI Workshop for Resistive Plate Chambers and Related Detectors held in Frascati, and especially we review the perspectives and ambitions of the community towards the XII Workshop to be held in Beijing in year 2014.

Accurate gamma and MeV-electron track reconstruction with an ultra-low diffusion Xenon/TMA TPC at 10 atmospheres

“…The presence of micro-discharges in non-insulated Micromegas operated close to breakdown is a well documented phenomenon (see for instance [37] and references therein), resulting in the present case in an average rate of current excursions about 10 /min/m 2 . Provided the pre-amplifier input is protected they have no influence in the detector stability.…”

First studies with the Resistive-Plate WELL gaseous multiplier

“…First, the region of multiplication is confined to the holes, the RPWELL can be preceded by large conversion/drift volumes while maintaining deposited energy proportionality. Second, the RPWELL can operate with standard counting gases, compared to RPCs, which require somewhat problematic gas mixtures [31,41]). Moreover the RP-WELL requires relatively low operation voltages.…”

Assessment of Eco-friendly Gases for Electrical Insulation to Replace the Most Potent Industrial Greenhouse Gas SF6

“…The applications of gaseous insulation, often containing components other than air and above atmospheric pressure, aim to avoid discharges in compact apparatuses. − The use of gases as electrical insulator in medium- and high-voltage equipment has many advantages over liquid and solid insulation such as relatively low weight, low costs, simple manufacturing process of equipment, full recovery of insulation performance after partial discharge, and the ability of insulating moving parts. In transformers, bushings, and gas-insulated transmission lines (GIL), the insulation gas solely serves as an electrical insulator, whereas in high-voltage circuit breakers of air-insulated switchgear or substations (AIS) and gas-insulated switchgear (GIS) the gas must comply with both electrical insulation and, if no vacuum interrupters are used, current interruption.…”