The BÃ\x98 Low-Beta Insertion Design for the Tevatron

The low design of the low-beta insertion installed at the BØ straight section of the Tevatron is presented. This design replaces two of the regular lattice quadrupoles with stronger, separately powered quadrupoles and adds an additional triplet in the free space on either side of the interaction point. By varying the four separate quadrupole circuits, and two trim quadrupole tuning circuits, it is possible to go smoothly from the normal, fixed-target configuration with ß* = 75 m in each plane to the colliding-beam mode of operation with ß* = 1 m in each plane, while maintaining a constant tune for the Tevatron.