The high field low loss system which has been delivered to DESY (one of the world's leading accelerator centres) is made from pairs of nested winding sections, separated by a solid stainless steel former, machined to have wedges to give the optimum X-ray aperture. The field direction is vertical.
Since the design is stress limited and not critical current limited, the magnet is designed to operate at full field at 4.2K and does not require operating at 2.2K.