CONTENTS  Symposium Schedule ................................................................................................................................. xi   Symposium Organizing and Advis ory Committees ..................................................................................... xv   Scroll Compressor for Mars Atmospheric Acquisition ............................................................................ ....... 1  John Wilson, Bryce Shaffer & Ted Iskenderian  The Regolith and Ice Drill for Exploration of New Terrains (TRIDENT); a One-Meter Drill   for the Lunar Resource Prospector Mission ................................................................................................ 13  Gale Paulsen, Zachary Mank, Alexander Wang, Paul Chow, Cody Hyman,  Thomas Thomas, Allen Lee, Kris Zacny, James Smith, Jacqueline Quinn,   Erik Mumm & Ron Hayes  KaRIn Alignment Mechanism Design, Development and Testing………………………………………….. .. 27  John Luke Wolff  Environmental Chamber Testing of a Rock Sampling Drill for Venu s Exploration ..................................... 41  Fredrik Rehnmark, Evan Cloninger, Cody Hyman, Jameil Bailey, Nick Traeden,  Kris Zacny, Kristopher Kriechbaum, Jo seph Melko, Brian Wilcox, Jeffery Hall &  Kristopher Sherrill  A Discussion of Friction Anomaly Si gnatures in Response to Electrical Discharge in Ball Bearings ......... 55  William Bialke  Efficacy of Lead Naphthenate for Wear Prot ection in Mixed Lubrication Regime ...................................... 69  Jason T. Galary  Dynamic Behavior of Ball Bear ings under Axia l Vibrat ion ....................................................................... ... 83  Virgil Hinque & René Seiler  The Design & Development of the Ocean Color Instrument Precision Superduplex  Hybrid Bearing Cartridge ............................................................................................................................. 9 7  Joseph Schepis, Timothy Woodard, Claef Hakun, Konrad Bergandy,  Joseph Church, Peter Ward, Michael Lee, Alfred Conti & Jeffrey Guzek  Evaluation of Friction Characteristics and Low Friction Mechanism of Tungsten Disulfide for  Space Solid Lubricant at Elevated Temperature in a Vacuum ................................................................. 113   Ayaka Takahashi, Josaphat Tetuko S S & Keizo Hashimoto  Performance of MoS 2 Coated Gears Exposed to Humid Air during Storage ........................................... 127  Timothy Krantz, Claef Hakun, Zachary Cameron, Iqbal Shareef & Michael Dube  An Improved Solid Lubricant for Bearings Operati ng in Space and Terrestrial Environments ................. 141  Arindam Paul, Harpal Singh, Kalyan C. Mutyala & G.L. Doll  Hybrid Lubrication of PFPE Fluids and Sputtered MoS 2........................................................................... 151  Michael Buttery, Anthony Kent, Dave  Forster & Achilleas Vortselas  Solving a Performance Limiting Resonance Frequen cy Problem of the SOFIA Secondary Mirror  Mechanism by Structur al Modifications ......................................................................................... ........... 165  Yannick Lammen, Andreas Reinacher & Alfred Krabbe  NASA/CP—2018-219887 v