Experimental optimisation of ion production by varying target thickness (IMAGE)
Caption
The acceleration is optimised when the target is turned relativistically transparent just at the peak of the laser intensity. This is achieved by matching the target thickness to the laser parameters, ensuring the density is as high as possible while still being transparent. This results in the highest proton (top) and carbon (middle) energies. The light is efficiently absorbed in the target bulk, with only ~1% being transmitted through (bottom). High fidelity 3D PIC simulation predictions closely match the experimental predictions.
Credit
by N.P. Dover, T. Ziegler et al.
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License
CC BY