The main topic of the book are the superconducting dipole and quadrupole magnets needed in high-energy accelerators and storage rings for protons, antiprotons or heavy ions. The basic principles of low-temperature superconductivity are outlined with special emphasis on the effects which are relevant for accelerator magnets. Properties and fabrication methods of practical superconductors are described. Analytical methods for field calculation and multipole expansion are presented for coils without and with iron yoke. The effect of yoke saturation and geometric distortions on field quality is studied. Persistent magnetization currents in the superconductor and eddy currents the copper part of the cable are analyzed in detail and their influence on field quality and magnet performance is investigated. Superconductor stability, quench origins and propagation and magnet protection are addressed. Some important concepts of accelerator physics are introduced which are needed to appreciate the demanding requirements on field quality in large storage rings. The operational experience with the superconducting HERA collider serves as an illustration. Finally superconducting correction coils and practical construction and fabrication methods of accelerator magnets are discussed. The physical and technical principles described in the book are substantiated with a wealth of experimental data on multipoles, persistent- and eddy-current effects, quench performance and much more.

After general remarks on the flow behaviour in blood circulation some experiments are described which were carried out on models in the Aero dynamischen Institut at the TH Aachen. In artery branchings, especially in prostheses, the sedimentation of substances which cause a stenosis can become critical because of secondary flows. Results obtained up to now are described on the variations of the unsteady flow conditions caused by the elasticity of the artery walls, as well as on the possibility and the danger of gas separation induced by the flow and wave phenomena. On models of artificial heart valves (aorta and mitralis prostheses) the flow pattern is observed and the pressure drop is measured; here the charac teristic parameters (size of prostheses related to aorta diameter, lift of the valve body, asymmetric position in the aorta inlet) are systematically varied, From the drag measurements an optimum arrangement for each valve type can be evaluated concerning the reduction of the heart muscle performance and of the formation of stagnation regions (danger of thrombosis). Finally model tests with swine blood in a special facility have confirmed that certain flow phenomena bring on a mechanically caused hemolysis."