2018/07/03 by Miriam Brosi, Johannes L. Steinmann, Edmund Blomley +14 · 1 citation
Physics and Astronomy · #physics.acc-ph
paper · pdf · doi:10.1103/physrevaccelbeams.22.020701
published as Phys. Rev. Accel. Beams 22, 020701 (2019) · 6 pages, 5 figures, to be submitted
arxiv created 2018/07/03 · arxiv updated 2019/02/15
At KARA, the KArlsruhe Research Accelerator of the KIT synchrotron, the so called short bunch operation mode allows the reduction of the bunch length down to a few picoseconds. The micro- bunching instability resulting from the high degree of longitudinal compression leads to fluctuations in the emitted THz radiation, referred to as bursting. For extremely compressed bunches at KARA, bursting occurs not only in one but in two different bunch-current ranges that are separated by a stable region. This work presents measurements of the bursting behavior in both regimes. Good agreement is found between data and numerical solutions of the Vlasov-Fokker-Planck equation.