Bent crystal channeling applications for beam splitting, extraction and collimation in the U-70 accelerator of IHEP

The report presents an overview of the results of IHEP activity obtained during 1987-2012 in the field of studying and using bent crystals to steer high-energy particle beams. The hardware installed to study crystal beam splitting, collimation and extraction is described. It has been shown that the developed crystal deflectors are capable for sustaining long-term operation to deliver high-energy extracted beams for fixed-target physics. The first results on extraction of 24.1 GeV/nucleon carbon ions are also presented.