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Report of the IFR Barrel Replacement Review Committee

In September 2002, BABAR management set up a working group to examine whether or not the physics program of BABAR justified a major upgrade of the barrel component of the IFR, which is used for muon and K L detection. If so, the group was to recommend a detector technology to be used for the replacement. The working group included proponents of each of the three technologies considered, consultants for various technical issues, and a review committee. This document is the report of the review committee to BABAR management. The executive summary includes the major findings and recommendations, and is followed by more a more detailed presentation of each of the technologies and the physics and engineering issues common to all three. The charge and activities of the working group are summarized in the appendices.