Intro; Supervisorś Foreword; Acknowledgments; Contents; Parts of this thesis have been published in the following journal articles:; Chapter 1: Electron Cloud in Particle Accelerators; 1.1 Electron Cloud Build-Up; 1.1.1 Generation of Primary Electrons; 1.1.2 Secondary Emission; 1.1.3 Build-Up Regimes; 1.1.4 Effect of External Magnetic Field; 1.2 Electron Cloud Instabilities; 1.3 Electron Cloud Tune Shift; 1.4 Beampipe Conditioning; References; Chapter 2: Beam Dynamics Measurements of the Fast Instability; 2.1 Beam Manipulation and Diagnostics; 2.1.1 Beam Manipulation; 2.1.2 Ring Manipulation

2.1.3 Beam Diagnostics2.1.4 Factors Beyond Control; 2.2 Dynamics of the Unstable Beam; 2.2.1 Peculiar Features of the Instability; 2.2.2 Intensity Dependence of the Instability Growth Rate; 2.2.3 Conditioning During the High-Intensity Operation; 2.3 Beam Stabilization by a Clearing Bunch; 2.3.1 Possible Operational Implementation of Electron Cloud Clearing; References; Chapter 3: Microwave Measurement of the Cloud Density; 3.1 Experimental Setup; 3.1.1 Hardware; 3.1.2 Physical Principle; 3.1.3 Signal Transmission; 3.2 Schottky Noise; 3.2.1 Noise Spectrum

3.2.2 Schottky Noise on the Recycler BPMs3.2.3 Frequency Selection; 3.3 Measured Electron Cloud Density; 3.3.1 Density Versus Beam Intensity; 3.3.2 Electron Cloud Decay; References; Chapter 4: Numerical Simulation; 4.1 Electron Cloud Trapping in a Combined Function Magnet; 4.1.1 Combined Function Dipole as a Magnetic Trap; 4.1.2 Electron Capture by the Field; 4.1.3 Electron Cloud Clearing with a Witness Bunch; 4.1.4 Lifetime of the Trapped Cloud; 4.2 Numerical Model; 4.2.1 Model of the Beam; 4.2.2 Model of the Ring; 4.2.3 Model of the Electron Cloud; 4.2.4 Beam-Cloud Interaction

4.3 Electron Cloud Build-Up4.3.1 Dependence on the Secondary Emission; 4.3.2 Dependence on Bunch Length; 4.3.3 Saturation of the Electron Cloud; 4.3.4 Trapping in a Combined Function Magnet; 4.3.5 Clearing with a Witness Bunch; 4.3.6 Peak Density of the Electron Cloud; 4.3.7 Electron Cloud in Drift Sections; 4.4 Electron Cloud Instability; 4.4.1 Growth Rate; 4.4.2 Most Unstable Mode; References; Chapter 5: Analytical Model of the Electron Cloud Instability; 5.1 Model of the Beam-Cloud Interaction; 5.1.1 Coasting Beam; 5.1.2 Bunched Beam; 5.2 Fast Instability in Recycler

5.3 Instability at Higher Intensities5.4 Landau Damping of the Fast Instability Using Octupoles; References; Chapter 6: Conclusion