{'fraction_non_alphanumeric': 0.03125, 'fraction_numerical': 0.0375, 'mean_word_length': 4.865853658536586, '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}}
Experimental investigation of the high harmonic traveling-wave tube

A new type of vacuum millimeter wave source-high harmonic traveling wave tube (HHTWT) fabricated and tested. The prototype tube shows 350mW@133.5GHz was delivered with 300mW@44.5GHz input signal. The beam voltage is 18.4kV and the beam current is 86mA. The experiment proved the high harmonic amplification can be realized in TWT. It provide a new way to obtain high power, wideband tunable terahertz radiation.