Four years after a first meeting in BADDECK, Canada, on the Physics of Ion-Ion and Electron-Ion collisions, a second Nato Advanced Study Institute, in HAl~/Lesse, Belgium, reexamined the subject which had become almost a new one, in consideration of the many important developments that had occured in the mean time. The developments have been particularly impressive in two areas : the di-electronic recombination of electrons with ions and the collisional processes of mUltiply charged ions. For dielectronic recombination, a major event was the obtainment, in 1983, of the first experimental data. This provided, at last, a non speculative basis for the study of that intricate and subtle process and strongly stimulated the theoretical activities. Multiply charged ions, on the other hand, have become popular, thanks to the development of powerful ion sources. This circumstance, together with a pressing demand from thermonuclear research for ionisation and charge exchange cross sections, has triggered systematic experimental investigations and new theoretical studies, which have contributed to considerably enlarge, over the last five years, our understanding of the collisional processes of multiply charged ions. Dielectronic recombination and multiply charged ions were therefore central points in the programme of the A.S.I. in HAN/Lesse and are given a corresponding emphasis in the present book.

Inhalt
Lectures on Electron-Ion Collisions.- Theory of electron-ion collisions.- Radiative capture processes in hot plasmas.- Electron-ion collisions in the average-configuration distorted-wave approximation.- Experiments on dielectronic recombination.- Experiments on electron-impact excitation and ionisation of ions.- Electron impact excitation and ionisation of ions Experimentais methods.- Dissociative recombination of molecular ions.- Recent developments in the theory of dissociative recombination and related processes.- Lectures on Ion-Ion (Atom) Collisions.- Theory of charge exchange and ionisation in ion-atom (ion) collisions.- Electron capture in ion-atom and ion-ion collisions.- Ion-ion collisions.- Charge exchange and ionisation in collisions between positive ions.- Transfer ionisation in collisions of multiply charged ions with atoms.- Lectures on Collisional Processes in Plasmas.- Electron-ion and ion-ion collisions in astrophysics.- The role of electronic and ionic collisions in Tokamak devices.- Seminars.- Cryring A facility for atomic, molecular and nuclear physics.- Electron impact ionisation of atomic hydrogen and helium.