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TY - UNPB AU - Marinelli, A. ED - Henderson, Stuart ED - Akers, Evelyn ED - Satogata, Todd ED - Schaa, Volker R.W. TI - Collective Dynamics and Coherent Diagnostics of Microbunched Relativistic Electron Beams J2 - Proc. of IPAC2015, Richmond, VA, USA, May 3-8, 2015 C1 - Richmond, VA, USA T2 - International Particle Accelerator Conference T3 - 6 LA - english AB - The generation of microbunching due to collective interactions is a key subject in relativistic electron beams. Often regarded as a parasitic effect, in recent times the use of the microbunching instability has been investigated in the context of generating coherent broadband radiation pulses and coherent electron cooling. In my talk I will review the core topics of my doctoral work. I will begin by describing the three-dimensional kinetic theory of the longitudinal space-charge interactions, which I used to lay the foundations of a fully kinetic treatment of the microbunching instability. I will then present the results of my experimental activity at the Next Linear Collider Test Accelerator of SLAC. In particular I will discuss the generation of coherent broadband photon pulses in a cascaded longitudinal space-charge amplifier, and the use of coherent diffraction imaging techniques for the diagnosis of beam microbunching. PB - JACoW CP - Geneva, Switzerland ER -