A highly efficient beam line for capturing a beam of low energy antiprotons right after extraction from an ion trap, transporting and injecting it into the AD-REC recycler ring is very important to minimize losses and fill the ring up to its space charge limit. The injector, or transport beam line, has to transport particles from the trap to the ring, providing focusing and beam shaping and adjusting the energy of the particles to match the energy of the ring.
We have also studied beam transport of a 60 MeV proton therapy beam at the Clatterbridge Cancer Centre (CCC). This required measurement of beam emittance at several positions of the beam delivery system and we have used the quadrupole scan method to measure all key beam parameters. This was the basis for the development of a complete numerical model of the beamline, including nine quadrupole and one bending magnet.
Plot showing beam transport through the Clatterbridge beam line.
As a contribution to ELENA project at CERN, the QUASAR Group is contributing to the optimization of the beam transport lines from the ELENA ring to the external ion trap experiments. This includes detailed modelling of all electrostatic elements for accurate studies as low energy particles require a higher accuracy in beam tracking so the impact from e.g. external and fringe fields can be adequately included.
Illustration of beam transport through an electrostatic bending element.
Selected publications
O. Karamyshev, D. Newton, C.P. Welsch, 'Optimization of Low Energy Electrostatic Beam Lines', Proceedings of IPAC2014 (2014) (PDF, 1,080 KB)
T. Cybulski, O. Karamyshev, C.P. Welsch, A. Degiovanni, 'Beam Emittance Measurements and Beam Transport Optimization at the Clatterbridge Cancer Centre', Proc. IPAC13, Shanghai, China (2013) (PDF, 965 KB)
O. Karamyshev, G. Karamysheva, A. Papash, M. R. F. Siggel-King, C. P. Welsch, 'Design of the injector for a small recycling ring on the CERN-AD', Nucl. Instr. Meth. A vol 700 pp 182-187 (2012)
Back to: QUASAR Group