The progress of a project on the research and development of fundamental
technologies for accelerator magnets using high Tc superconductors (HTS)
is presented. The project is funded by Japan Science and Technology
Agency. The aim of the project is to establish technologies for
cryo-cooler-cooled HTS accelerator magnets wound with coated conductors.
At the first stage of the project, the conceptual design study of
accelerators was carried out, and the coils of the HTS magnets which are
compatible with these accelerators were designed. The R&D of winding
technologies for coils with three-dimensional shape and those with
negative bend are in progress. The influence of the tape magnetization
on the field quality of magnets was studied.