Author/Authors :
Fraga، نويسنده , , F.A.F. and Fraga، نويسنده , , M.M.F.R. and Marques، نويسنده , , R.F. and Margato، نويسنده , , L.M.S. and Gonçalo، نويسنده , , J.R. and Policarpo، نويسنده , , A.J.P.L. and van Eijk، نويسنده , , C.W.E and Hollander، نويسنده , , R.W. and van der Marel، نويسنده , , J.، نويسنده ,
Abstract :
A study of the operation of microstrip and microgap detectors at various gas pressures up to 6 bar with KrCO2, XeCO2 and XeCH4 is presented. The data were collected with a microstrip (1000 μm pitch) and a microgap (200 μm pitch) detector using a clean chamber and gas system. It is shown that maximum gain is strongly dependent on pressure and gains as high as 9 × 103 were obtained with KrCO2 at 6 bar with a MSGC. With the smaller-pitch MGC we could get a gain of 180 with XeCH4 at 6 bar; the typical energy resolution at 22 keV being about 15%. From the present work one can conclude that microstructures can operate at high pressure and that their application in high-efficiency, low-granularity X-ray detectors with an energy range up to a few tens of keV can be seriously considered.
