Deflection and Extraction of Pb Ions up to $33\mathrm{TeV}/\mathit{c}$ by a Bent Silicon Crystal

The first results from an experiment to deflect a beam of fully stripped, ultrarelativistic ${\mathrm{Pb}}^{82+}$ ions of $400\mathrm{GeV}/c$ per unit of charge, equivalent to $33\mathrm{TeV}/c$, by means of a bent crystal are reported. Deflection efficiencies are as high as 14%, in agreement with theoretical estimates. In a second experiment a bent crystal was used to extract $270\mathrm{GeV}/c$-per-charge ${\mathrm{Pb}}^{82+}$ $\left(22\mathrm{TeV}/c\right)$ ions from a coasting beam in the CERN-SPS, and a high extraction efficiency of up to 10% was found. These represent the first measurements to demonstrate applications of bent crystals in high energy heavy ion beams.