2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37151The first proof-of-principle experiment on "crystal collimation" was performed with 70-GeV protons on IHEP accelerator. A bent crystal installed in the ring as a primary element upstream of a collimator has reduced the radiation levels downstream in the accelerator by a factor of two. The measurements agree with Monte Carlo predictions.8pp. Presented at the 7th ICFA mini-workshop (Lake Como 1999)High Energy Physics - Experimenttext