The NGX-600 mass spectrometer is attached to a small volume, gas extraction line with 55 W CO2 laser, two SAES GP-50 getters, an Edwards PCC cryo cooler operating at 120 K, and a gas reservoir/pipette system. The NGX has nine Faradays detectors each equipped with ATONA amplifiers and one Hammamatsu electron multiplier. The NGX was installed in July of 2019 and has been tested and calibrated (Mixon et al., 2020). The NGX source was upgraded with a next generation low temperature, Nier-type ion source in December 2020. Data from the NGX are reduced using Python-based Pychron software.
The WiscAr Lab NGX is configured for 40Ar/39Ar measurements with 9 Faradays and 1 IC multiplier in the L4 position. Each Faraday collector is equipped with Isotopx’s ATONA amplifier technology. Two collecting schemes for 40Ar/39Ar are shown above (Blue: all Faradays, Red: 36Ar on electron multiplier in L4 position). Figure from Mixon et al. (2020).