Beam extraction studies at 900 GeV using a channeling crystal

Details Beam extraction studies at 900 GeV using a channeling crystal Beam extraction studies at 900 GeV using a channeling crystal

1999-09-29

arxiv.org/abs/physics/9909062v1

Physics

Accelerator Physics

55 pages

Scientific paper

Luminosity-driven channeling extraction has been observed for the first time in a 900 GeV study at the Fermilab Tevatron. This experiment, Fermilab E853, demonstrated that useful TeV level beams can be extracted from a superconducting accelerator during high luminosity collider operations without unduly affecting the background at the collider detectors. Multi-turn extraction was found to increase significantly the efficiency of the process. The beam extraction efficiency was about 25%. Studies of time dependent effects found that the turn-to-turn structure was governed mainly by accelerator beam dynamics. An investigation of a pre-scatterer using the accelerator flying wire system showed that a fiber could produce a significant extracted flux, consistent with expectations. Based on these results, it is feasible to construct a parasitic 5-10 MHz proton beam from the Tevatron collider.

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