A design for a beam halo scraper system for the Tevatron Collider

The next Tevatron Collider run will have higher luminosity than the previous run as well as separated beams. In order to achieve a low beam halo background rate in both collider detectors, the beam scraper system has been greatly expanded. In the previous run, only the beam scraper was used, and it was only used at the beginning of stores. For the next run, eight scrapers will be available. Because of the separated orbits, protons and antiprotons must be scraped independently. There are scrapers for both vertical and horizontal planes. For every primary scraper, there is a secondary scraper to catch particles scattered back out of the edge of the primary scraper.<>