Crystal channeling of LHC forward protons with preserved distribution in phase space

Details Crystal channeling of LHC forward protons with preserved distribution in phase space Crystal channeling of LHC forward protons with preserved distribution in phase space

2007-03-31

arxiv.org/abs/0704.0031v1

Phys.Lett.B658:7-12,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 3 figures

Scientific paper

10.1016/j.physletb.2007.10.051

We show that crystal can trap a broad (x, x', y, y', E) distribution of particles and channel it preserved with a high precision. This sampled-and-hold distribution can be steered by a bent crystal for analysis downstream. In simulations for the 7 TeV Large Hadron Collider, a crystal adapted to the accelerator lattice traps 90% of diffractively scattered protons emerging from the interaction point with a divergence 100 times the critical angle. We set the criterion for crystal adaptation improving efficiency ~100-fold. Proton angles are preserved in crystal transmission with accuracy down to 0.1 microrad. This makes feasible a crystal application for measuring very forward protons at the LHC.

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