Speaker
Description
LhARA, which stands for “Laser-hybrid Accelerator for Radiobiological Applications,” is a novel and flexible facility dedicated for research in radiobiology. The design has 2 stages, a proton beam of energy up to 15 MeV can be produced by a laser driven source. The beam can then enter a Fixed Field Alternating gradient accelerator (FFA) for post acceleration to produce a variable extraction energy between 15-127 MeV. To prevent uncontrolled beam loss, the operational tune was picked carefully to avoid resonances. The magnetic field must be adjusted to ensure the tune stays at the same working point for different energy ranges.
The FFA ring consists of ten cells, each containing a single combined-function spiral magnet; the edge focusing provided by the spiral angle allows the machine circumference to be minimised. A magnetic gradient is generated by having distributed conductors wrapped around the pole, each carrying a different current. A three-dimensional study was carried out in OPERA 3D and the parameters of the magnet were optimised. The results showed that resonances up to fourth order was avoided for the entire range of acceleration and different operational energies.
| Region represented | Europe |
|---|---|
| Paper preparation format | LaTeX |
