{'fraction_non_alphanumeric': 0.03322259136212625, 'fraction_numerical': 0.011627906976744186, 'mean_word_length': 4.583333333333333, '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}}
An Electron-Cyclotron-Resonance Plasma as a Source of Multiply Charged Ions

The properties of an electron-cyclotron-resonance (ECR) plasma (3 cm microwaves up to 2.4 kW) have been investigated. A total of 80 ¿A noble gas ion current has been extracted from a 1 mm dia. hole so far. The charge state distributions show a maximum above the 1+ state, indicating that multiple impact ionization is a dominant process. X-ray spectra, sheath potential and microwave reflection were measured to gain some physical understanding of the discharge. The applicability of our device as an ion source is discussed.