Improving homogeneity of the magnetic field by a high-temperature superconducting shield

The shielding opportunity of the magnetic field perpendicular component by the high-temperature superconducting tape (HTS) is shown experimentally for the first time. The tapes are laid closely to each other with a shift of pieces from layer to layer equal to a half of the tape width at the experimental set-up. This multilayer cylindrical structure inserted into the solenoid is similar to the unclosed shield from a uniform piece of the superconducting foil with the corresponding current-carrying capacity. It has been found that the maximum shielding field is proportional to the number of layers and a half of the full magnetization field of one tape for the regular multilayer structure of the HTS segments. The obtained results are necessary to construct systems with the high magnetic field homogeneity, in particular, for the electron cooling system of charged particle beams at the new accelerator complex which is being developed at JINR in Dubna, Russia.