A true two-dimensional mustrip gas chamber has been constructed and successfully tested. This new detector has an effective substrate thickness of less than 2 mum. An ion implanted oxide layer of 1.8 mum thickness provides the necessary insulation between the front and back plane and permits collection on the back electrodes of a large fraction of the induced charge. The back electrode signal is used to measure the coordinate along the anode strips (X-Y readout) or to provide true space points (pixel readout). Very good imaging capabilities have been obtained in both cases. A flux of 10(7) particles/mm2 s has been measured without significant gain loss. No charging effect has been observed after three days continuously running at a flux of 10(4) particles/mm2s, while a 15% gain loss, probably due to ageing effects, has been measured after collection on the strips of a charge corresponding to the more than six years of running at the design luminosity of LHC, at 50 cm from the beam axis.
A MICROSTRIP GAS CHAMBER WITH TRUE 2-DIMENSIONAL AND PIXEL READOUT
ANGELINI, FRANCO;MASSAI, MARCO MARIA;
1992-01-01
Abstract
A true two-dimensional mustrip gas chamber has been constructed and successfully tested. This new detector has an effective substrate thickness of less than 2 mum. An ion implanted oxide layer of 1.8 mum thickness provides the necessary insulation between the front and back plane and permits collection on the back electrodes of a large fraction of the induced charge. The back electrode signal is used to measure the coordinate along the anode strips (X-Y readout) or to provide true space points (pixel readout). Very good imaging capabilities have been obtained in both cases. A flux of 10(7) particles/mm2 s has been measured without significant gain loss. No charging effect has been observed after three days continuously running at a flux of 10(4) particles/mm2s, while a 15% gain loss, probably due to ageing effects, has been measured after collection on the strips of a charge corresponding to the more than six years of running at the design luminosity of LHC, at 50 cm from the beam axis.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
