International Workshop on Fixed Field alternating gradient Accelerators (FFA’19)

Session

Beam Dynamics

21 Nov 2019, 14:00

WBGB/019 (TimeOut)

29. Precise Modelling and Large Scale Multiobjective Optimisation of Cyclotrons

Jochem Snuverink

21/11/2019, 14:00

The usage of numerical models to study the evolution of particle beams is an essential step in the design process of particle accelerators. However, uncertainties of input quantities such as beam energy and magnetic field lead to simulation results that do not fully agree with measurements, hence the final machine will behave differently compared to the simulations. In case of cyclotrons such...

4. Muon Accumulator Optics for a Muon Beam produced from positron-electron annihilation

Oscar Roberto BLANCO-GARCIA (LNF/INFN)

21/11/2019, 14:45

LEMMA is studying the possibility of a future muon collider where muons are produced from positrons impinging on a target. Unlike conventional muon sources, muons are produced with a very small emittance, however, a small population is produced due to the small cross section of the e+e- annihilation into muons. In order to increase the muon beam population, we are currently designing a muon...

27. Longitudinal tomography in a scaling FFA

David Kelliher

21/11/2019, 16:00

Abstract: Longitudinal tomography, already well established in synchrotrons, involves reconstructing the phase space using bunch monitor data obtained for a sufficient number of turns in a synchrotron oscillation. In this presentation it is shown how this technique can be adapted for the FFA case. The resulting tomography code is used to reconstruct the longitudinal phase space using data...

21. The Vortex Effect in High-Intensity Cyclotrons and Isochronous FFA's

Christian Baumgarten (PSI - Paul Scherrer Institut)

21/11/2019, 16:45

We discuss the main factors that influence the space charge induced vortex
motion of particles within high intensity bunches (Gordon 1969)
in isochronous circular machines.
Firstly a phase slip due to deviations from strict isochronism determines
if the bunches of a specific turn are above, below or at "transition",
and hence whether stable vortex motion of the bunches is possible at...

3. Beam optics design and optimization for a superconducting gantry

Bin Qin (Huazhong University of Science and Technology)

The novel superconducting (SC) gantry has become a research hotspot with the tendency of compact proton therapy system. The footprint and weight of the gantry can be significant reduced by using SC magnets, and alternating gradient field of local achromatic bending sectors provides large momentum acceptance which means the magnetic field of SC magnets can remain fixed during tumor treatment....