The energy spectrum of ions generated by ultra-high laser and plane film copper target interaction
Tang CM., Chen XX., Hong W.
In the experiment of ultra-intense laser interaction with plane film copper target, ions spectrum are studied at the target rear-side normal direction. The solid nuclear detector CR39 and Thomson spectrum are used to detect the energy spectrum of protons and carbon ions. Protons and C4+, C3+, C2+ and C1+ ions have been observed. In addition, the results show that the ions are cut-off at a certain energy. Moreover, the carbon ions traces are very weaker than the protons trace, so the yields of proton is much higher than carbon ions, and the protons have some screening effect on the carbon ions. And the cut-off energy of the carbon ion is increased with the charge-to-mass ratio in the same shot.