LabCAF Development on Sealed RPCs <ul>Miguel Morales, February 2010, Santiago de Compostela </ul>
Motivation <ul>Trasgo is a convenient and flexible detector based on gas ionization detectors. </ul>One Trasgo chamber 2010
Motivation <ul>Trasgo is a convenient and flexible detector based on gas ionization detectors. </ul>One Trasgo chamber Is there any chance to get rid of the gas system to win some flexibility? 2010
Issues with the current gas system <ul><li>Economic reasons . Gas systems and facilities cost money.
Environmental unfriendly , R134a, SF6 are strong green house effect gases.
Lack of portability . Gas systems have an important weight and volume. </li></ul>2010
Sealed Resistive Plate Chambers (sRPCs) <ul>40 mm x 40 mm x 4 mm </ul>0.3 mm nylon gap Cu Electrodes Epoxy Glue Thermoplastic Float Glass Gas mixture <ul><li>Some caveats: </li><ul><li>Glass borders have to be polished
Some time running a dry gas is needed to extract glass moisture. </li></ul></ul>Fishing Line Electrodes Polyestirene Aluminium Foil Epoxy Glue Trasgo proposal Our first sRPC prototype <ul>800 mm x 200 mm x 10 mm </ul>2010
sRPC Overview Signal Socket BNC HV Socket High Frequency Analog Amplifier PT100 Temperature Sensor Aluminum Box Sealed Chamber Two RC Circuits Standard gas mixture R134a/SF6/Isobutane 85/10/5 2010
Setup 2.2 nF Current monitoring 10 K Ω 10 M Ω 2.2 nF 3 kV sRPC Low-pass RC filter (<3Hz) High-pass RC filter (>85Hz) High Frequency Analog Amplifier Analog to Digital Converter Power Supply Digital Scope TDS7104 CAEN N471A 2010 A ADC [Digital Scope]