GLOBUS-M spherical tokamak is to be constructed at A.F.Ioffe Institute, St.Petersburg next year. The problems of the GLOBUS-M most critical components design and manufacturing are basically solved.

At the same time the revision of the basic physical parameters in the process of tokamak design and manufacturing resulted in a change of the device engineering concepts:

• the increase of plasma current and toroidal magnetic field increased loads acting on the magnets. As a result the mechanical support structure was reinforced, the thickness of TF coil outer limbs was increased, the stiffness of the TF center rod was increased, the principle of TF coil top contact joint construction was changed.
• the design and manufacturing technology of central solenoid as well as its conductor manufacturing technology were modified.
• the reinforcement of support structure as well as the change of TF coil top contact construction complicated essentially an access to the vacuum vessel port of 400 mm diameter envisaged for dismantling and replace of in-vessel components.
• in order to simplify the access to the vessel large port additional contact joints were developed for two TF coil outer limbs disposed in front of the ports.