{'fraction_non_alphanumeric': 0.027450980392156862, 'fraction_numerical': 0.010784313725490196, 'mean_word_length': 5.150602409638554, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
X-ray response predictions of first-wall-material candidates for the LMJ target chamber

The Laser Megajoule facility will chiefly be used to study the ignition of DT fuel capsules. All the elements contained in the chamber (diagnostics insertion system, target holder, first wall, debris shields) will undergo X-ray fluences and debris emissions. Numerical simulations using the 1D codes FSCATT and DELPOR (hydrodynamics and thermodynamics model) have been performed in order to characterize the mechanical behavior of different candidate materials under X-ray fluence: aluminum, boron carbide, pyrolytic graphite and fused silica. Two spectra have been utilized for these simulations: a 350 eV blackbody spectrum and the gold X-ray conversion Phebus spectrum. Vaporized and melt thicknesses are assessed as well as pressure in the materials for X-ray fluences ranging from 0.3 J/cm2 to 100 J/cm2. For aluminum, comparisons with LLNL simulations and with experiments carried out on Phebus and Nova facilities are given.