Dresden 2020 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 16: Posters
AKBP 16.8: Poster
Donnerstag, 19. März 2020, 16:30–18:00, P1C
Advanced Landau Damping for high energy and high intensity machines — •Vadim Gubaidulin1,2, Vladimir Kornilov2, Elias Metral3, and Oliver Boine-Frankenheim1,2 — 1TU Darmstadt, Darmstadt, Germany — 2GSI, Darmstadt, Germany — 3CERN, Geneva, Switzerland
Impedance driven transverse beam instabilities in hadron synchrotrons are damped by either an active feedback system or passive mitigation via Landau damping due to dedicated Landau octupole magnets.
For high energy machines, like the proposed Future Circular Collider (FCC-hh) or the Large Hadron Collider high luminosity upgrade (HL-LHC), this passive mitigation mechanism is weakened due to smaller transverse amplitudes. This study considers other sources of Landau damping (DC and pulsed electron lenses and RFQs) and their combination with octupole magnets for transverse beam instabilities mitigation in high energy and high-intensity machines.
DC and pulsed electron lens options are studied with stability diagram theory and particle tracking simulations with beam transfer function and simple impedance driven instability models. This study considers the effect of different electron beam profile shapes and sizes on Landau damping and an effect of combining octupoles with newer methods. An example of slow head-tail instability in HL-LHC is used to compare particle tracking results with stability diagram theory for advanced Landau damping sources and their combination with octupole magnets.