Crystal-Assisted Beam Extraction and Collimation at the U-70 Circular Accelerator

TL;DR

This paper demonstrates the effectiveness of new crystal-based devices for beam extraction and collimation in the U-70 accelerator, achieving high efficiency and reduced particle losses across a range of energies.

Contribution

Introduction of novel crystal devices, including bent strips and a fan-type reflector, for improved beam extraction and collimation in a high-energy accelerator.

Findings

Achieved about 90% extraction and collimation efficiency at 50 GeV.

Reduced particle losses by 2-3 times compared to traditional methods.

Effective beam steering across a wide energy range.

Abstract

New crystal technique - array of bent strips and a fan-type reflector, based on thin straight plates - have been used for research of extraction and collimation a circulating beam in the U-70 accelerator at the energy 50 GeV and 1.3 GeV. It is shown, that new devices can effectively steer a beam in a wide energy range. For protons with energy 50 GeV efficiency of extraction and collimation about 90 % has been achieved which is record for this method. Reduction of particle losses in 2-3 times was observed also in accelerator at application of different crystals in comparison with the usual one-stage collimation scheme of beam with a steel absorber.