Microbunching instability in accelerators, Janus-faced phenomena
Dr. habil. Atoosa Meseck (Helmholtz-Institut Berlin)

Enabled by the rapid progress in the fields of accelerator research and development, particle beams with extremely high brightness are routinely available in the new generation of accelerator facilities. These high-brightness beams are more prone to the space-charge driven microbunching instability (MBI), which can on the one hand cause a significant degradation of the beam quality and be thus a serious threat to the accelerator performance and on the other hand, when controlled properly, it can assist with the beam preparation for the facility, for example as a mean for coherent electron cooling. Accordingly, MBI, possible countermeasures and applications are subject of ongoing research worldwide. I will introduce the origin and driving process of the MBI and discuss its experimental occurrence as well as its current and future applications in the collider facilities and synchrotron radiation sources.