Controlled Transport and Focusing of Laser-Accelerated Protons with Miniature Magnetic Devices
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 500T/m. The approach is highly reproducible and predictable, leading to a focal spot of (286×173)μm 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.
- Publication:
-
Physical Review Letters
- Pub Date:
- August 2008
- DOI:
- Bibcode:
- 2008PhRvL.101e5004S
- Keywords:
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- 52.38.Kd;
- 41.85.Lc;
- 52.59.-f;
- Laser-plasma acceleration of electrons and ions;
- Beam focusing and bending magnets wiggler magnets and quadrupoles;
- Intense particle beams and radiation sources