| Paper | Title | Page |
|---|---|---|
| TUPAN065 | Proton Beam Quality Improvement by a Tailored Target Illuminated by an Intense Short-Pulse Laser | 1538 |
|
||
|
Suppression of a transverse proton divergence is focused by using a controlled electron cloud. When an intense short pulse laser illuminates a foil plasma target, first electrons are accelerated and they form a strong electric field at the target surface, then protons can be accelerated by the strong field created. An electron cloud is limited in the transverse direction by plasma at the protuberant part, if the target has a hole at the opposite side of the laser illumination*. The proton beam is accelerated and also controlled by the transverse shaped electron cloud, and consequently the transverse divergence of the beam can be suppressed. In 2.5D particle-in-cell simulations, the transverse shape of the electron cloud is controlled well.
* R. Sonobe, S. Kawata, et. al., Phys. Plasmas 12 (2005) 073104. |