Abstract
This Letter demonstrates the transporting and focusing of laser-accelerated 14 MeV protons by permanent magnet miniature quadrupole lenses providing field gradients of up to . The approach is highly reproducible and predictable, leading to a focal spot of full width at half maximum 50 cm behind the source. It decouples the relativistic laser-proton acceleration from the beam transport, paving the way to optimize both separately. The collimation and the subsequent energy selection obtained are perfectly applicable for upcoming high-energy, high-repetition rate laser systems.
- Received 17 April 2008
DOI:https://doi.org/10.1103/PhysRevLett.101.055004
©2008 American Physical Society