@article{article, title = {{Ballistic focusing of polyenergetic protons driven by petawatt laser pulses}}, publisher = {{American Physical Society}}, url = {{}}, year = {{2011}}, month = {{1}}, author = {{Kar S and Markey K and Borghesi M and Carroll DC and McKenna P and Neely D and Quinn MN and Zepf M}}, volume = {{106}}, journal = {{Physical review letters}}, pages = {{225003-225003}}, note = {{Accessed on 2025/04/08}}}