Würzburg 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
AKBP: Arbeitskreis Beschleunigerphysik
AKBP 11: Synchrotron Radiation Sources, Hadron Accelerators and Colliders
AKBP 11.6: Vortrag
Donnerstag, 22. März 2018, 17:45–18:00, NW-Bau - HS5
Moving Long-Range Beam-Beam Encounters in Heavy-Ion Colliders — •Marc Jebramcik1,2 and John Jowett1 — 1CERN, Geneva, Switzerland — 2Goethe University Frankfurt, Frankfurt, Germany
Heavy-ion colliders like the LHC or RHIC are occasionally operated with asymmetric beams, i.e., the two beams contain different ion species. The most prominent example for the LHC is the collision of fully stripped lead ions with protons (Pb-p). One way to accelerate the two beams simultaneously is ramping the energy with both beams having the same magnetic rigidity. This acceleration scheme, however, leads to slightly unequal revolution frequencies and therefore to moving long-range beam-beam encounters in the interaction regions of the collider. The resulting time-modulated momentum kicks might cause the excitation of overlap knock-out resonances, emittance blow-up and fast beam losses. A model to describe the observed phenomena has been developed and is applied to the LHC and RHIC.