Beam dynamics simulation in a linear accelerator for CERN Future Circular Collider

Results of the beam dynamics simulation in a linear accelerator at full energy 1.5 – 2.0 GeV for an international project – CERN Future Circular Collider (FCCee) are presented. FCC is developing designs for a higher performance particle collider to extend the research currently being conducted at the Large Hadron Collider, once the latter reaches the end of its lifespan. Beam dynamics simulations done using BEAMDULAC-BL code developed in NRNU MEPhI. This code allows taking into account both the quasistatic and high-frequency self-field components.

The TeraFERMI Electro-Optic Sampling Set-Up for Fluence-Dependent Spectroscopic Measurements

TeraFERMI is the THz beamline at the FERMI free-electron-laser facility in Trieste (Italy). It uses superradiant Coherent Transition Radiation emission to produce THz pulses of 10 to 100 μ J intensity over a spectral range which can extend up to 12 THz. TeraFERMI can be used to perform non-linear, fluence-dependent THz spectroscopy and THz-pump/IR-probe measurements. We describe in this paper the optical set-up based on electro-optic-sampling, which is presently in use in our facility and discuss the properties of a representative THz electric field profile measured from our source. The measured electric field profile can be understood as the superimposed emission from two electron bunches of different length, as predicted by electron beam dynamics simulations.