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ABSTRACT: . The muon (g Gamma 2) experiment at Brookhaven has just completed a 3-month run for checkout and initial data-taking. In the first two months beam was taken in a parasitic mode where one out of ten AGS pulses was delivered for commissioning of the beam line, quadrupoles, detectors, and data acquisition. This was followed by four weeks of dedicated data collection. The main components of the experiment, which include the pion/muon beam line, the superconducting inflector, the superferric storage ring with its pulsed electric quadrupoles and magnetic field measurement system, and the detector system based on lead-scintillating fiber electron calorimeters, have been satisfactorily commissioned. The muon (g Gamma 2) precession frequency is clearly seen as a large signal. It is estimated that over 25 Theta 10 6 decay positrons with energies greater than 1:5 GeV have been detected. INTRODUCTION To the current level of experimental precision (4 ppb), the anomalous g factor ...