{'fraction_non_alphanumeric': 0.025191675794085433, 'fraction_numerical': 0.007667031763417305, 'mean_word_length': 4.539393939393939, '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}}
Resonant absorption in a plasma step profile

Resonant absorption of p-polarized light shone on a plane-layered plasma with a step profile, is discussed as a function of wavelength (or critical density nc) of the light; for simplicity the incidence angle is assumed small. If nc lies within or above the step, the absorption A is given by Ginzburg's result (1970) modified by strong reflections at the foot and top of the step. The absorption above is total for particular values of nc and theta . For nc crossing the top of the density step the absorption is not monotonical; it exhibits a minimum that vanishes for zero radius of curvature sigma there (A approximately mod ln sigma mod 2), and zero collision frequency nu (A approximately mod 1n nu mod -2). The results are applied to the profile produced by irradiating a solid target with a high-intensity pulse that steepens the plasma by radiation pressure.