arXiv 1807.011452018-07-03physics.acc-ph

Systematic Studies of the Micro-Bunching Instability at Very Low Bunch Charges

Miriam Brosi, Johannes L. Steinmann, Edmund Blomley, Erik Bründermann, Julian Gethmann, Benjamin Kehrer, Yves-Laurent Mathis, Alexander Papash, Manuel Schedler,… 展开作者

Miriam Brosi, Johannes L. Steinmann, Edmund Blomley, Erik Bründermann, Julian Gethmann, Benjamin Kehrer, Yves-Laurent Mathis, Alexander Papash, Manuel Schedler, Patrik Schönfeldt, Marcel Schuh, Markus Schwarz, Michele Caselle, Lorenzo Rota, Marc Weber, Peter Kuske, Anke-Susanne Müller

备注：: 6 pages, 5 figures, to be submitted
发表信息：: Phys. Rev. Accel. Beams 22, 020701 (2019)
DOI：: 10.1103/PhysRevAccelBeams.22.020701

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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.

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