Abstract
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.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of IPAC2014, Dresden, Germany |
| Pages | 1689-1691 |
| Number of pages | 3 |
| Publication status | Published - 2014 |
| Event | 5th International Particle Accelerator Conference, IPAC 2014 - Dresden, GERMANY, Dresden, Germany Duration: 2014 Jun 15 → 2014 Jun 20 |
Conference
| Conference | 5th International Particle Accelerator Conference, IPAC 2014 |
|---|---|
| Country/Territory | Germany |
| City | Dresden |
| Period | 2014/06/15 → 2014/06/20 |
Subject classification (UKÄ)
- Accelerator Physics and Instrumentation
Free keywords
- collective effects
- impedance