A High Intensity Beam Dump for the Tevatron Beam Abort System

The beam abort system proposed' for the Fermilab Tevatron Accelerator will extract the proton beam from the ring in a single turn (-20~s) and direct it to an external beam dump. It is the function of the beamdump to absorb the unwanted beam and limit the excapingradiation to levels that are acceptable to the surrounding populace and apparatus. In addition, it is clearly desirable that it be maintenance free and have a lifetime equal to that of the accelerator, lo-20 years. A beam dump that is expected to meet these requirements hasbeen designed and constructed. We describe below the detailed design of the dump, including considerations leading to the choice of materials.