{'fraction_non_alphanumeric': 0.018378378378378378, 'fraction_numerical': 0.0075675675675675675, 'mean_word_length': 4.646341463414634, '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}}
Fabrication and Testing of the First Module of the SNS RFQ

The 2.5 MeV injector for the Spallation Neutron Source is currently under construction at LBNL, which includes a 2.5 MeV high power, high duty factor four vane RFQ made of four modules. Transverse mode stabilization is obtained through a series of cross coupling rods. Each of the four RFQ modules is equipped with twenty fixed tuners, two active power and two vacuum ports. Fine frequency tuning is accomplished by adjusting the temperature differential in two separate cooling circuits, one on the RFQ body and the other near the vane tips. The RF drive is provided via 3-1/8 inch rigid coaxial lines and a coaxial RF vacuum barrier window. The first module has been built, confirming all fabrication, assembly and brazing techniques. This paper will cover the mechanical fabrication details as well as the early results from commissioning tests underway at LBNL.