[en] A linac beam profile measurement system using wire scanners has been implemented at the Bates Linear Accelerator Center. This facilitates obtaining an optimum linac focusing solution. A nearly non-invasive beam size measurement is made of the two beams which are accelerated simultaneously in the recirculating linac. The wire scanner mechanical accuracy is near one mil. Beam size measurements are reproducible to a few mils. 4 refs., 7 figs