IGF::OT::IGF THIS TECHNOLOGY DEVELOPMENT (TD) WILL ULTIMATELY DELIVER A QUALIFICATION MODEL (QM) SUB-KILOWATT INTEGRATED ELECTRIC PROPULSION (EP) SYSTEM, BASED ON MAGNETICALLY SHIELDED HALL-EFFECT THRUSTER TECHNOLOGY, OPTIMIZED FOR USE WITH ESPA-CLASS SPACECRAFT. THE QM PROPULSION SYSTEM SHALL INCLUDE A THRUSTER/CATHODE ASSEMBLY, A POWER PROCESSING UNIT (PPU), AND A XENON FEED SYSTEM. THE TD WILL BE DIVIDED INTO THREE PHASES. PHASE ONE WILL TAKE PLACE PRIMARILY IN FY18. PHASE ONE WILL FOCUS ON DEVELOPMENT OF LABORATORY MODEL PPU AND THRUSTER HARDWARE TO DEMONSTRATE THE NECESSARY TECHNOLOGIES AND IDENTIFY TECHNOLOGY AREAS IN NEED OF FURTHER RISK REDUCTION EFFORTS. PHASE ONE WILL CONCLUDE WITH SUCCESSFUL COMPLETION OF THE SKEP PRELIMINARY DESIGN REVIEW (PDR). PHASE TWO WILL TAKE PLACE PRIMARILY IN FY19 (TASKS WILL BE DETERMINED IN LATE FY18). PHASE TWO WILL DESIGN, BUILD, AND DEMONSTRATE AN ENGINEERING MODEL INTEGRATED ELECTRIC PROPULSION SYSTEM. PHASE TWO WILL CONCLUDE WITH SUCCESSFUL COMPLETION OF THE SKEP CRITICAL DESIGN REVIEW (CDR). PHASE THREE WILL TAKE PLACE PRIMARILY IN FY20 (TASKS WILL BE DETERMINED IN LATE FY19). PHASE THREE WILL BUILD A QM PROPULSION SYSTEM AND PERFORM QUALIFICATION TESTING. PHASE THREE WILL CONCLUDE WITH SUCCESSFUL COMPLETION OF ALL ENVIRONMENTAL TESTING. THE CONTRACTOR'S DESIGN DECISIONS SHALL FOCUS HEAVILY ON SIMPLICITY, LOW_COST, RELIABILITY, LONG_LIFE, AND COMMERCIAL VIABILITY. EXCEEDING STATE-OF-THE-ART (SOA) PERFORMANCE IS NOT A DEVELOPMENT GOAL. HOWEVER, SKEP COMPONENT AND SYSTEM LEVEL PERFORMANCE SHOULD BE AT LEAST CONSISTENT WITH THE STATE-OF-THE-ART (SOA) AND REFLECT GUIDANCE IN THE ATTACHED DOCUMENTATION.