Chromatic aberrations correction of attosecond high-order harmonic beams by flat-top spatial shaping of the fundamental beam oleh K Veyrinas, M Plach, J Peschel, M Hoflund, F Catoire, C Valentin, P Smorenburg, H Dacasa, S Maclot, C Guo, H Wikmark, A Zaïr, V Strelkov, C Picot, C Arnold, P Eng-Johnsson, A L’Huillier, E Mével, E Constant