Muons and electrons in general

We address the problem of simultaneously identifying electrons and muons in a general-purpose detector at a luminosity of 1033 cm-2sec-1. Those discoveries and important measurements which are reasonably well predicted now are under way and likely to be fairly complete before turn on. The signatures of new effects to be found at high rates are not well predicted, and for flexibility it may be necessary to look simultaneously for some combination of jets, missing E/sub T/, electrons, and muons. This leads immediately to an open geometry with magnetic tracking and calorimetry. At high luminosity, getting out trigger informtion quickly is a prime concern. Note that if a given signature requires isolating individual events then even for an optimistic integration time of 20 ns, the optimal luminosity is about 2x1032cm-2sec-1. We have not had the opportunity to be very specific in design or to consider the extended momentum range implied by 10 to 20 TeV collisions