9 % not measured not measured temporal bunch width (FWHM) not measured 0.74 ns 1.23 ns 0.76 ns estimated number of ions 1.7 ⋅ 10 9 7 ⋅ 10 8 2 ⋅ 10 8 6 ⋅ 10 8 The most recent transported beams were used [...] the L3 beamline, which is capable of generating the necessary proton beams with a repetition rate of 1 Hz. The combination of these two elements will ultimately prove the viability of laser-based injectors [...] subnanosecond proton bunches from a laser-driven source. Physical Review Accelerators and Beams , 22 (1), 011301. doi.org/10.1103/PhysRevAccelBeams.22.011301 Metternich, M., Nazary, H., Schumacher, D., Brabetz