Laser-based ion acceleration as a source of high intensity MeV-range ion bunches became subject of extensive research during the last 15 years. The created ions (most often protons) are discussed as potential candidate for various applications in science, technology and medicine. However, their usage often requires special ways of beam shaping first, as the particles are emitted in a wide energy spectrum and with a large divergence angle from the laser matter interaction point. Therefore, a test stand for collimation, energy selection and monochromation of laser accelerated protons has been build at GSI, using a pulsed high field solenoid and a radiofrequency cavity to produce intense proton bunches with low energy spread from a TNSA source.

Energy compression of an intense proton bunch around 10 MeV central energy to an energy spread of less than 3% could be demonstrated. The particle numbers were in excess of 109 protons and the bunch duration
was only a few nanoseconds. Furthermore, shortest bunches and thus highest intensities are accessible with this setup via phase focusing. The necessary extension of the beamline to 6 m full length and a first experimental campaign has been realized recently and compressed proton pulses with down to 600 ps bunch length have been measured.

This novel laser-driven proton beamline, available now at GSI, will be introduced, latest experimental results presented and its perspective discussed as a test-bed for the combination of laser and accelerator technology to supply a novel compact ion source of highest bunch intensities.

Seminarraum HI-Jena, Fröbelstieg 3
Datum (Start der Veranstaltung)