Fast drift GRID with GEM

The only available technique at the present time, to perform particle ident ification up to 40-50 GeV/c in a 4 pi solenoidal geometry using the Cherenk ov ring imaging method is the use of gaseous detectors filled with either T MAE or TEA photocathodes, and a combination of the gaseous, and solid or li quid radiators. If one would consider building such a device, one may want to investigate alternative methods of building a single-electron detector. This paper investigates the feasibility of using the GEM together with a si mple MWPC detector employing 33 mu m diameter carbon wires to obtain a seco nd coordinate. The results are compared to the GRID single-electron detecto r. (C) 1999 Elsevier Science B.V. All rights reserved.