The resulting ions were separated in a magnetic sector and detected by an electron multiplier. Electrons can be detected using an electron multiplier, usually a channeltron. Another geometry of continuous-dynode electron multiplier is called the microchannel plate (MCP). The most common detectors used for TIMS is Faraday cup, Daly detector, and electron multiplier. His first assignment was to develop an electron multiplier to go with the Image Orthicon. The electron multiplier consists of a number of electrodes called "dynodes". An electron multiplier is a vacuum-tube structure that multiplies incident charges. The electron multiplier allows for faster response time, increased sensitivity and higher gain. The first device of this kind was called a Channel Electron Multiplier (CEM). In typical U-Pb zircon analysis, a single secondary electron multiplier is used for ion counting.