Electromagnetic Efficiency of Block Design in Superconducting Dipoles

Semi-analytical scaling laws have been derived for the electromagnetic design of superconducting dipoles based on sector coils approximation. Here we discuss the different features of block coils designs used in the past, focusing on the field quality issues, and on the efficiency of the electromagnetic design (i.e. short sample field versus the quantity of superconductor) with respect to the standard cos theta design.