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M 6.3 - 84 km SSW of Nikolski, Alaska
• M 3.6 - 185 km SE of Perryville, Alaska
• M 2.8 - 119 km SSW of Nikolski, Alaska
• M 1.0 - 22 km NE of San Lucas, CA
• M 1.9 - 26 km SW of Ackerly, Texas
• M 1.6 - 32 km NNE of Skwentna, Alaska
• M 2.1 - 4 km NNE of Snoqualmie, Washington
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#489881
Fri 01 Feb 2019 09:20:AM
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Joined: Feb 2001
Posts: 678,977
Launch Director
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Launch Director
Joined: Feb 2001
Posts: 678,977 |
Abstract: The design of a new diagnostic to measure the net erosion of Hall thruster surfaces is presented. This diagnostic consists of a pair of optical non-contact profilometer pens mounted to a set of motion stages, which can interrogate the surface features of multiple components of interest including the hollow cathode assembly, magnet front pole covers, and discharge channel. By comparing scans of these surfaces to reference features, estimates of the component erosion rates can be acquired throu... Source: In-Situ Diagnostic for Assessing Hall Thruster Wear
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