The MIT/Bates south hall ring

The Bates laboratory is in the conventional construction phase of a project to build and commission a ring of 190 m circumference to store electron currents up to 80 mA at energies 0.3-1.0 GeV. Storage times of 1 msec to several seconds are planned for a variety of extracted beam and internal target physics experiments. The facility is briefly described and specific challenges in the areas of magnetic measurement, fiducialization, and survey and alignment are discussed. Transverse position precisions of approximately 100 microns and a total orbit circumference precision of 2 mm are sought