Beam lifetime studies

The study of nonlinear and long-term beam dynamics using codes such as BETACOOL, OPERA-3D, and MAD-X is needed to explain the physical effects in a whole class of low energy storage rings.

This plot represents the horizontal emittance of a particle beam as a function of its momentum spread, a common diagnostic tool in accelerator physics.

The Group have been investigating the performance of rings, such as ELENA and the USR, by means of beam dynamic simulations for different operation modes. This includes modelling all relevant physics phenomena for this kind of machine, e.g. Intra-Beam-Scattering (IBS), scattering on the residual gas and interaction with the electron cooler. This allows us to study lifetime and stability of the beam, as well as calculate the dynamic aperture of the machine under realistic assumptions.

The image displays a graph showing the results of BETACOOL simulations for the intensity decay of oxygen ion beams stored in the ELISA (Electrostatic Ion Storage Ring, Aarhus) at an energy of 22 keV.

Selected publications

C. P.Welsch, A. I. Papash, J. Harasimowicz, O. Karamyshev, G. A. Karamysheva, D. Newton, M. Panniello, M. Putignano, M. R. F. Siggel-King, A. Smirnov, 'Beam life time studies and design optimization of the Ultra-low energy Storage Ring', Hyperfine Interactions, DOI 10.1007/s10751-014-1063-2 (2014)

A. Papash, A. Smirnov and C.P. Welsch, 'Nonlinear and long-term beam dynamics in low energy storage rings', Phys. Rev. ST Accel. Beams 16, 060101 (2013)

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