9 research outputs found
Beam extraction studies at 900 GeV using a channeling crystal
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. Multipass extraction was found to increase the efficiency of the process significantly. 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. Based on the results of this experiment, it is feasible to construct a parasitic 5–10 MHz proton beam from the Tevatron collider
Focusing of Parametric X-ray Radiation from a Bent Crystal
An idea of producing a focused parametric X-ray radiation (PXR) is presented.
The PXR is emitted by relativistic charged particles channeling along a bent
crystal. Then the PXR emitted from the whole length of the bent crystal is
going to the focus. Some properties of focused PXR are estimated for typical
experimental conditions and possible applications are discussed. The experiment
for observation of focused PXR is proposed.Comment: 8 pages, including 1 figur