Direct tests of micro channel plates as the active element of a new shower maximum detector

We continue the study of micro channel plates (MCP) as the active element of a showermaximum (SM) detector. We present below test beam results obtained with MCPs detecting directly secondary particles of an electromagnetic shower. The MCP efficiency to showerparticles is close to 100%. The time resolution obtained for this new type of the SM detector is at the level of 40 ps.