Investigation into the Magnetic Structure Characteristics of the NICA Booster in Commissioning Runs with the Beam in 2020–2022

The injection chain of the NICA Collider (JINR, Dubna) consists of various ion sources, two linear accelerators, a superconducting (SC) Booster synchrotron, the existing SC synchrotron Nuclotron, and beam transfer lines. Construction of the Booster synchrotron was finished in 2020 and the first machine Run with ion beam was successfully carried out in December. So far, three commissioning Runs with various ion beams have been successfully completed. The tuning processes, the study of the beam parameters, and optical characteristics of the Booster during these Runs are presented.