Transverse Instabilities in the MAX IV 3 GeV Ring
Författare
Summary, in English
Collective effects in MAX IV 3 GeV storage ring are strongly enhanced by the combination of low emittance, high current and small effective aperture. Three passive harmonic cavities (HC) are introduced to lengthen the bunches, by which beam stabilization is anticipated via decoupling to high frequency wakes, along with Landau damping. The role of the transverse impedance budget of the MAX IV 3
GeV storage ring as a source of collective beam instabilities was determined. With the help of the macroparticle multibunch tracking code mbtrack that directly uses the former as input, we studied the influence of geometric and resistive wall impedance in both transverse planes, as well as that of chromaticity shifting. A fully dynamic treatment of the passive harmonic cavities developed for this study allowed us to evaluate their effectiveness under varying beam conditions.
GeV storage ring as a source of collective beam instabilities was determined. With the help of the macroparticle multibunch tracking code mbtrack that directly uses the former as input, we studied the influence of geometric and resistive wall impedance in both transverse planes, as well as that of chromaticity shifting. A fully dynamic treatment of the passive harmonic cavities developed for this study allowed us to evaluate their effectiveness under varying beam conditions.
Avdelning/ar
Publiceringsår
2014
Språk
Engelska
Sidor
1689-1691
Publikation/Tidskrift/Serie
Proceedings of IPAC2014, Dresden, Germany
Dokumenttyp
Konferensbidrag
Ämne
- Accelerator Physics and Instrumentation
Nyckelord
- collective effects
- impedance
Conference name
5th International Particle Accelerator Conference, IPAC 2014
Conference date
2014-06-15 - 2014-06-20
Conference place
Dresden, Germany
Status
Published
ISBN/ISSN/Övrigt
- ISBN: 978-3-95450-132-8