Maps for coupled electron and ion clouds in accelerators

Maps for Coupled Electron and Ion Clouds in Accelerators

Electron and Ion Sources for Particle Accelerators

A brief introduction to electron and ion sources for particle accelerators is given. Concentrating on the basic processes for the production of these particles, thermionic and photocathode production of electrons and the processes in Penning and electron cyclotron resonance ion sources are covered. Finally, negative ions are discussed.

Measurement of electron clouds in large accelerators by microwave dispersion.

Clouds of low energy electrons in the vacuum beam pipes of accelerators of positively charged particle beams present a serious limitation for operation at high currents. Furthermore, it is difficult to probe their density over substantial lengths of the beam pipe. We have developed a novel technique to directly measure the electron cloud density via the phase shift induced in a TE wave transmit...

Maps, electron-clouds in RHIC and first-order phase-transitions

A simple model is developed based on the theory of logistic maps to investigate possible explanations for sudden changes in multipacting-related outgassing rates, the so called first-order phase transitions, observed in the Relativistic Heavy Ion Collider (RHIC). Stability conditions are introduced for the map description and it is shown that a possible residual gas-related mechanism that may e...

Electron Beam Ion Sources, Ion Optical Elements and Beam Diagnostics for Particle Accelerators

Electron Beam Ion Sources (EBISs) provide highly charged ions (HCIs) for a variety of investigations and applications, e.g. amongst others as injection source for particle accelerators. EBISs feature a lot of advantages which qualify them for accelerator injection, and which partly compensate for their comparatively low number of particles. DREEBIT GmbH provides a family of compact EBISs based ...