The design and construction of the permanent magnet Lambertson for the Recycler Ring at Fermilab

This paper will show and discuss the simple design of a permanent magnet Lambertson used to extract and inject the 8 GeV beam from the Fermilab Main Injector Ring to the Recycler Ring, and from the Recycler Ring to the Main Injector. Pictures will show how four different magnets used to form the injection and extraction double dog legs are made from one universal design. Detailed assembly drawings will illustrate the construction techniques using solid pieces of steel instead of laminations. The field strength in both the bending region and the field free region will be discussed along with temperature compensation of the strontium ferrite magnetic bricks.