{'fraction_non_alphanumeric': 0.011811023622047244, 'fraction_numerical': 0.003937007874015748, 'mean_word_length': 4.593406593406593, '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}}
Particle Balance Study in Long-Pulse Discharges in LHD

Plasma density behavior has been studied in long pulse discharges with a neutral beam injection on LHD by using a global particle balance equation. The main external particle sources originate from gas puffing, beam particles and gas flow from the beam duct. The wall acts as a large sink and wall pumping is still effective for a long pulse discharge with the duration of 80 sec. This pumping effect is observed in both hydrogen and helium discharges.