Devices for steering particle beams in the accelerators based on crystals curved by scratching the grooves on the surface

An interesting method of bending silicon crystal plates by scratching the grooves on the surface mechanically has been presented in the paper. This method appears to have considerable promise for both the U70 accelerator at the Institute for High Energy Physics and the devices at the Large Hadron Collider (LHC). Using the method mentioned above, specific devices were made: a crystalline undulator for 3 GeV positrons, short crystalline deflectors for extraction of 70 GeV proton beam from the U70 accelerator, and multistrip crystals for collimating the 6500 GeV proton beam into the LHC.