Article published in NIM A

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The research focus of the QUASAR Group lies on the development of key technologies and techniques for the Ultra-low energy Storage Ring (USR). This novel electrostatic storage ring will allow, for the first time, to realize kinematically complete collision studies between low energy antiprotons and various gas targets. These experiments require shortest beam pulses in the range of 1-2 ns at lowest beam energies of only 20 keV.

It has been a significant challenge for the storage ring accelerator-physics community to develop techniques to reduce the duration of bunches. Given he natural dispersion of the beam and the coupling between transverse and longitudinal motion in an electrostatic storage ring, such pulses are very difficult to realize.

In this paper, we present the results from numerical studies that investigate into different beam bunching scenarios to pave the way for an entirely new class of experiments with low energy antiprotons. It was shown that both, a bunch compression/decompression scheme and an iso-adiabatic split procedure can generate such pulses.