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TY - CONF AU - Volkov, V. AU - Petrov, V.M. ED - Michel, Peter ED - Arnold, André ED - Schaa, Volker RW TI - Numerical Estimation of Beam Break-Up Instability in TESLA Cavities J2 - Proc. of SRF2019, Dresden, Germany, 30 June-05 July 2019 CY - Dresden, Germany T2 - International Conference on RF Superconductivity T3 - 19 LA - english AB - In this article the numerically estimated BBU instability behaviors of a 9 cell superconducting TESLA cavity are presented for first two pass-band trapped dipole modes (18 in all). The given BBU threshold current values are calculated by the method of beam energy gain averaging on phases of dipole mode fields. BBU instability behaviors in cases of applying the cavities in Linacs as well in Energy Recovery Linacs (ERLs) are considered. The BBU influence on beam emittance degradation is demonstrated. Examples for suppression of beam BBU oscillations by a solenoid focusing and applying of an external RF generator with a feedback are visualized. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1178 EP - 1181 KW - dipole KW - cavity KW - solenoid KW - linac KW - focusing DA - 2019/08 PY - 2019 SN - "" SN - 978-3-95450-211-0 DO - doi:10.18429/JACoW-SRF2019-THP104 UR - http://jacow.org/srf2019/papers/thp104.pdf ER -