{'fraction_non_alphanumeric': 0.009111617312072893, 'fraction_numerical': 0.0, 'mean_word_length': 4.945945945945946, '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}}
Study of the Beam Transport in a High-Energy Neutral Helium Beam System with Double Charge Exchange Cell

The beam transport of a negative ion production system with a charge exchange cell was studied experimentally and by using the simulation code SIMION. The focusing effect of the electric accelerator was confirmed in the experiment. The simulation results showed that the space charge effect plays an important role in beam transport.