555 / 2019-03-20 15:47:28

Generation And Characteristics of Laser-accelerated Monoenergetic Ion Beams with Magnetic Selector

Laser accelerated ion beams,Quasi-monoenergetic ion beams

全体主题 > Laser and Particle Beam Fusion

Laser acceleration of ions from the rear surface of solid targets has gained great attention in the field, due to its excellent properties that short pulse, high intensity and low emittance. Because of these excellent characteristics, Laser-accelerated ion beams can produce conditions that are hot and dense enough to simulate the interior of a star. It can also be used to diagnose the process of ion transport and stopping in plasma, and fast ignition in inertial confinement fusion. Laser accelerated ion beams are also very suitable for studying the irradiation damage of the plasma facing material in the fusion device.
In addition to its important contribution to basic science, it is also of great value in application. In recent years, high intensity and short pulsed ion beams has been widely used in metal/non-metal material surface modification, film deposition, ion beam mixing, nano-powder preparation and other aspects. It also has important applications in biology and medicine, for example heavy ion radiotherapy.
While laser accelerated ion beams show outstanding qualities, it has almost 100% energy spread. In recent experiment, we obtained high intense pulsed protons and carbon ion beam from the rear surface of solid target by 100J ps laser interacts with heated W-CH target, and the quasi-monoenergetic ion beam was selected by the magnetic spectrometer. A slit was placed at the back of the magnetic spectrometer to select the ion beam, and different positions of the slit correspond to different energies of the ion beam. The quasi-monoenergetic ion beam passing through the magnetic spectrometer is of good quality. The energy spread of quasi-monoenergetic ion beam is only 0.06%, and the divergence angle is only 3.84~6.28 mrad .