Ions and in particular antiprotons, stored and cooled at low energies in a storage ring or at rest in traps, are highly desirable for the investigation of a large number of basic questions on fundamental interactions, on the static structure of exotic antiprotonic atomic systems or of (radioactive) nuclei as well as on the time-dependent quantum dynamics of correlated systems. Such low energy, low intensity beams pose, however, new challenges on beam instrumentation, as they require least

more »

... ive diagnostics operating at ultra-high vacuum pressures of the order of 10