An Expression of Interest to Detect and Measure the Dierct CP Violating Decay K_L --> pi0 nu nu_bar and Other Rare Decays at Fermilab Using the Main Injector

We, the KAMI (Kaons at the Main Injector) collaboration, express our interest to continue the experimental program of rare kaon decay physics at Fermilab using the Main Injector. KAMI's primary physics goals shall be: 1. The first detection of the rare, direct CP violating decay K_L --> pi0 nu nu_bar and measurement of its branching ratio with an accuracy of 10%, corresponding to a measurement of the CP violating parameter eta with 5% accuracy; and 2. Studies of various other rare decay processes such as K_L --> pi0ee, pi0mumu, pi0mue, pi+pi-e+e-,mu+mu-,e+e-, etc. with sensitivities of approximately 10E-13.