5 ELECTROSTATIC DUST CHARGING AND TRANSPORT HAS BEEN SUGGESTED TO BE RESPONSIBLE FOR A NUMBER OF OBSERVED PHENOMENA ON THE SURFACES OF AIRLESS BODIES, SUCH AS THE LUNAR HORIZON GLOW, THE DUST PONDS ON ASTEROID EROS, AND THE SPOKES IN THE SATURNS RINGS. IT MAY ALSO BE PARTIALLY RESPONSIBLE FOR RECENT ROSETTA COLLECTION OF DUST PARTICLES IN THE VICINITY OF COMET 67P AND PONDED DUST SEEN ON THE COMETS SURFACE. ELECTROSTATIC DUST ACTIVITIES POSE HAZARD TO ROBOTIC AND HUMAN EXPLORATIONS AS WELL AS INSTRUMENTS DEPLOYED ON THE SURFACE OF ANY AIRLESS PLANETARY OBJECT. THIS LONG-STANDING PROBLEM REMAINS UNRESOLVED HOW DUST PARTICLES COLLECT SUFFICIENT CHARGE AND BECOME ELECTROSTATICALLY LOFTED AND MOBILIZED ON THESE SURFACES. OUR RECENT EXPERIMENTAL RESULTS WITH THE NEWLY PROPOSED PATCHED CHARGE MODEL HAVE FUNDAMENTALLY CHANGED OUR VIEWS ON THE SURFACE DUST CHARGING AND TRANSPORT, LAYING A FOUNDATION AND LEADING US TO A NEW DIRECTION FOR FURTHER INVESTIGATIONS. WE PROPOSE THE INTERTWINED COMBINATION OF LABORATORY EXPERIMENTS AND COMPUTER SIMULATIONS TO UNDERSTAND DUST CHARGING/LAUNCHING AND THE SUBSEQUENT DYNAMICS SELF-CONSISTENTLY. WE WILL ANSWER THE FOLLOWING SCIENCE QUESTIONS: WHAT IS THE CHARGE STATE OF THE MOBILIZED DUST PARTICLES? WHAT IS THE ROLE OF COHESIVE FORCES IN DUST MOBILIZATION? WHAT CONTROLS THE LAUNCH AND SUBSEQUENT DYNAMICS (INCLUDING LEVITATION) OF THE DUST PARTICLES? AND HOW DO LARGE SURFACE ELECTRIC FIELDS REDISTRIBUTE DUST PARTICLES? DUST CHARGING AND TRANSPORT EXPERIMENTS WILL BE PERFORMED IN TWO EXISTING VACUUM CHAMBERS WITH VARIOUS PLASMA/UV CONDITIONS, DUST SIZES, SHAPES (IRREGULAR AND MICROSPHERE) AND COMPOSITIONS TO ADDRESS ALL THE OPEN QUESTIONS DESCRIBED ABOVE. THE PURCHASE OF A NEW CAMERA SYSTEM IS REQUESTED IN ORDER TO RESOLVE THE PARTICLE SIZE OF 10 MICRONS AND RECORD FULL DUST HOPPING TRAJECTORIES. DUST CHARGING AND LAUNCH PROCESS WILL BE MODELED USING A TEST-PARTICLE APPROACH AND THE SUBSEQUENT DUST DYNAMICS WILL BE MODELED WITH A COMBINATION OF A CURVILINEAR PARTICLE-IN-CELL CODE CPIC AND A FORWARD MONTE-CARLO TEST-PARTICLE CODE. ALL THE COMPUTER SIMULATIONS WILL BE COMPARED WITH AND INTERPRET EXPERIMENTAL RESULTS. WE ALSO EXPECT THAT THESE CODES VALIDATED WITH OUR EXPERIMENTS CAN ALSO HELP TO SCALE THE LABORATORY RESULTS TO SPACE CONDITIONS, PROVIDING EXPLANATION AND PREDICTION FOR EXISTING AND FUTURE OBSERVATIONS. THE PROPOSED WORK IS DIRECTLY RELEVANT TO THE SCOPES OF THE SSW PROGRAM, WHICH ARE PLASMA INTERACTIONS WITH STRUCTURES AND BODIES, AND PROCESSES IN RING SYSTEMS AND THEIR INTERACTIONS WITH MAGNETOSPHERES. OUR WORK WILL HAVE BROAD IMPACT ON PLANETARY SCIENCE AND GEOPHYSICS COMMUNITIES AS WELL AS ROBOTIC AND HUMAN EXPLORATIONS. Funding Only Action ($622) 1/27/22 Not listed ELECTROSTATIC DUST CHARGING AND TRANSPORT HAS BEEN SUGGESTED TO BE RESPONSIBLE FOR A NUMBER OF OBSERVED PHENOMENA ON THE SURFACES OF AIRLESS BODIES SUCH AS THE LUNAR HORIZON GLOW THE DUST PONDS ON ASTEROID EROS AND THE SPOKES IN THE SATURNS RINGS. IT MAY ALSO BE PARTIALLY RESPONSIBLE FOR RECENT ROSETTA COLLECTION OF DUST PARTICLES IN THE VICINITY OF COMET 67P AND PONDED DUST SEEN ON THE COMETS SURFACE. ELECTROSTATIC DUST ACTIVITIES POSE HAZARD TO ROBOTIC AND HUMAN EXPLORATIONS AS WELL AS INSTRUMENTS DEPLOYED ON THE SURFACE OF ANY AIRLESS PLANETARY OBJECT. THIS LONG-STANDING PROBLEM REMAINS UNRESOLVED HOW DUST PARTICLES COLLECT SUFFICIENT CHARGE AND BECOMEELECTROSTATICALLY LOFTED AND MOBILIZED ON THESE SURFACES. OUR RECENT EXPERIMENTAL RESULTS WITH THE NEWLY PROPOSED PATCHED CHARGE MODEL HAVE FUNDAMENTALLY CHANGED OUR VIEWS ON THE SURFACE DUST CHARGING AND TRANSPORT LAYING A FOUNDATION AND LEADING US TO A NEW DIRECTION FOR FURTHER INVESTIGATIONS.WE PROPOSE THE INTERTWINED COMBINATION OF LABORATORY EXPERIMENTS AND COMPUTER SIMULATIONS TO UNDERSTAND DUST CHARGING/LAUNCHING AND THE SUBSEQUENT DYNAMICS SELF-CONSISTENTLY. WE WILL ANSWER THE FOLLOWING SCIENCE QUESTIONS: WHAT IS THE CHARGE STATE OF THE MOBILIZEDDUST PARTICLES? WHAT IS THE ROLE OF COHESIVE FORCES IN DUST MOBILIZATION? WHAT CONTROLS THE LAUNCH AND SUBSEQUENT DYNAMICS (INCLUDING LEVITATION) OF THE DUST PARTICLES? AND HOW DO LARGE SURFACE ELECTRIC FIELDS REDISTRIBUTE DUST PARTICLES?DUST CHARGING AND TRANSPORT EXPERIMENTS WILL BE PERFORMED IN TWO EXISTING VACUUM CHAMBERS WITH VARIOUS PLASMA/UV CONDITIONS DUST SIZES SHAPES (IRREGULAR AND MICROSPHERE) AND COMPOSITIONS TO ADDRESS ALL THE OPEN QUESTIONS DESCRIBED ABOVE. THE PURCHASE OF A NEW CAMERA SYSTEM IS REQUESTED IN ORDER TO RESOLVE THE PARTICLE SIZE OF 10 MICRONS AND RECORD FULL DUST HOPPING TRAJECTORIES. DUSTCHARGING AND LAUNCH PROCESS WILL BE MODELED USING A TEST-PARTICLE APPROACH AND THE SUBSEQUENT DUST DYNAMICS WILL BE MODELED WITH A COMBINATION OF A CURVILINEAR PARTICLE-IN-CELL CODE CPIC AND A FORWARD MONTE-CARLO TEST-PARTICLE CODE. ALL THE COMPUTER SIMULATIONS WILL BE COMPARED WITH AND INTERPRET EXPERIMENTAL RESULTS. WE ALSO EXPECT THAT THESE CODES VALIDATED WITH OUR EXPERIMENTS CAN ALSO HELPTO SCALE THE LABORATORY RESULTS TO SPACE CONDITIONS PROVIDING EXPLANATION AND PREDICTION FOR EXISTING AND FUTURE OBSERVATIONS. THE PROPOSED WORK IS DIRECTLY RELEVANT TO THE SCOPES OF THE SSW PROGRAM WHICH ARE PLASMA INTERACTIONS WITH STRUCTURES AND BODIES AND PROCESSES IN RING SYSTEMS AND THEIR INTERACTIONS WITH MAGNETOSPHERES. OUR WORK WILL HAVE BROAD IMPACT ON PLANETARY SCIENCE ANDGEOPHYSICS COMMUNITIES AS WELL AS ROBOTIC AND HUMAN EXPLORATIONS. ($622) 1/27/22 Not listed ELECTROSTATIC DUST CHARGING AND TRANSPORT HAS BEEN SUGGESTED TO BE RESPONSIBLE FOR A NUMBER OF OBSERVED PHENOMENA ON THE SURFACES OF AIRLESS BODIES SUCH AS THE LUNAR HORIZON GLOW THE DUST PONDS ON ASTEROID EROS AND THE SPOKES IN THE SATURNS RINGS. IT MAY ALSO BE PARTIALLY RESPONSIBLE FOR RECENT ROSETTA COLLECTION OF DUST PARTICLES IN THE VICINITY OF COMET 67P AND PONDED DUST SEEN ON THE COMETS SURFACE. ELECTROSTATIC DUST ACTIVITIES POSE HAZARD TO ROBOTIC AND HUMAN EXPLORATIONS AS WELL AS INSTRUMENTS DEPLOYED ON THE SURFACE OF ANY AIRLESS PLANETARY OBJECT. THIS LONG-STANDING PROBLEM REMAINS UNRESOLVED HOW DUST PARTICLES COLLECT SUFFICIENT CHARGE AND BECOMEELECTROSTATICALLY LOFTED AND MOBILIZED ON THESE SURFACES. OUR RECENT EXPERIMENTAL RESULTS WITH THE NEWLY PROPOSED PATCHED CHARGE MODEL HAVE FUNDAMENTALLY CHANGED OUR VIEWS ON THE SURFACE DUST CHARGING AND TRANSPORT LAYING A FOUNDATION AND LEADING US TO A NEW DIRECTION FOR FURTHER INVESTIGATIONS.WE PROPOSE THE INTERTWINED COMBINATION OF LABORATORY EXPERIMENTS AND COMPUTER SIMULATIONS TO UNDERSTAND DUST CHARGING/LAUNCHING AND THE SUBSEQUENT DYNAMICS SELF-CONSISTENTLY. WE WILL ANSWER THE FOLLOWING SCIENCE QUESTIONS: WHAT IS THE CHARGE STATE OF THE MOBILIZEDDUST PARTICLES? WHAT IS THE ROLE OF COHESIVE FORCES IN DUST MOBILIZATION? WHAT CONTROLS THE LAUNCH AND SUBSEQUENT DYNAMICS (INCLUDING LEVITATION) OF THE DUST PARTICLES? AND HOW DO LARGE SURFACE ELECTRIC FIELDS REDISTRIBUTE DUST PARTICLES?DUST CHARGING AND TRANSPORT EXPERIMENTS WILL BE PERFORMED IN TWO EXISTING VACUUM CHAMBERS WITH VARIOUS PLASMA/UV CONDITIONS DUST SIZES SHAPES (IRREGULAR AND MICROSPHERE) AND COMPOSITIONS TO ADDRESS ALL THE OPEN QUESTIONS DESCRIBED ABOVE. THE PURCHASE OF A NEW CAMERA SYSTEM IS REQUESTED IN ORDER TO RESOLVE THE PARTICLE SIZE OF 10 MICRONS AND RECORD FULL DUST HOPPING TRAJECTORIES. DUSTCHARGING AND LAUNCH PROCESS WILL BE MODELED USING A TEST-PARTICLE APPROACH AND THE SUBSEQUENT DUST DYNAMICS WILL BE MODELED WITH A COMBINATION OF A CURVILINEAR PARTICLE-IN-CELL CODE CPIC AND A FORWARD MONTE-CARLO TEST-PARTICLE CODE. ALL THE COMPUTER SIMULATIONS WILL BE COMPARED WITH AND INTERPRET EXPERIMENTAL RESULTS. WE ALSO EXPECT THAT THESE CODES VALIDATED WITH OUR EXPERIMENTS CAN ALSO HELPTO SCALE THE LABORATORY RESULTS TO SPACE CONDITIONS PROVIDING EXPLANATION AND PREDICTION FOR EXISTING AND FUTURE OBSERVATIONS. THE PROPOSED WORK IS DIRECTLY RELEVANT TO THE SCOPES OF THE SSW PROGRAM WHICH ARE PLASMA INTERACTIONS WITH STRUCTURES AND BODIES AND PROCESSES IN RING SYSTEMS AND THEIR INTERACTIONS WITH MAGNETOSPHERES. OUR WORK WILL HAVE BROAD IMPACT ON PLANETARY SCIENCE ANDGEOPHYSICS COMMUNITIES AS WELL AS ROBOTIC AND HUMAN EXPLORATIONS. $0 2/6/20 4 ELECTROSTATIC DUST CHARGING AND TRANSPORT HAS BEEN SUGGESTED TO BE RESPONSIBLE FOR A NUMBER OF OBSERVED PHENOMENA ON THE SURFACES OF AIRLESS BODIES, SUCH AS THE LUNAR HORIZON GLOW, THE DUST PONDS ON ASTEROID EROS, AND THE SPOKES IN THE SATURNS RINGS. IT MAY ALSO BE PARTIALLY RESPONSIBLE FOR RECENT ROSETTA COLLECTION OF DUST PARTICLES IN THE VICINITY OF COMET 67P AND PONDED DUST SEEN ON THE COMETS SURFACE. ELECTROSTATIC DUST ACTIVITIES POSE HAZARD TO ROBOTIC AND HUMAN EXPLORATIONS AS WELL AS INSTRUMENTS DEPLOYED ON THE SURFACE OF ANY AIRLESS PLANETARY OBJECT. THIS LONG-STANDING PROBLEM REMAINS UNRESOLVED HOW DUST PARTICLES COLLECT SUFFICIENT CHARGE AND BECOME ELECTROSTATICALLY LOFTED AND MOBILIZED ON THESE SURFACES. OUR RECENT EXPERIMENTAL RESULTS WITH THE NEWLY PROPOSED PATCHED CHARGE MODEL HAVE FUNDAMENTALLY CHANGED OUR VIEWS ON THE SURFACE DUST CHARGING AND TRANSPORT, LAYING A FOUNDATION AND LEADING US TO A NEW DIRECTION FOR FURTHER INVESTIGATIONS. WE PROPOSE THE INTERTWINED COMBINATION OF LABORATORY EXPERIMENTS AND COMPUTER SIMULATIONS TO UNDERSTAND DUST CHARGING/LAUNCHING AND THE SUBSEQUENT DYNAMICS SELF-CONSISTENTLY. WE WILL ANSWER THE FOLLOWING SCIENCE QUESTIONS: WHAT IS THE CHARGE STATE OF THE MOBILIZED DUST PARTICLES? WHAT IS THE ROLE OF COHESIVE FORCES IN DUST MOBILIZATION? WHAT CONTROLS THE LAUNCH AND SUBSEQUENT DYNAMICS (INCLUDING LEVITATION) OF THE DUST PARTICLES? AND HOW DO LARGE SURFACE ELECTRIC FIELDS REDISTRIBUTE DUST PARTICLES? DUST CHARGING AND TRANSPORT EXPERIMENTS WILL BE PERFORMED IN TWO EXISTING VACUUM CHAMBERS WITH VARIOUS PLASMA/UV CONDITIONS, DUST SIZES, SHAPES (IRREGULAR AND MICROSPHERE) AND COMPOSITIONS TO ADDRESS ALL THE OPEN QUESTIONS DESCRIBED ABOVE. THE PURCHASE OF A NEW CAMERA SYSTEM IS REQUESTED IN ORDER TO RESOLVE THE PARTICLE SIZE OF 10 MICRONS AND RECORD FULL DUST HOPPING TRAJECTORIES. DUST CHARGING AND LAUNCH PROCESS WILL BE MODELED USING A TEST-PARTICLE APPROACH AND THE SUBSEQUENT DUST DYNAMICS WILL BE MODELED WITH A COMBINATION OF A CURVILINEAR PARTICLE-IN-CELL CODE CPIC AND A FORWARD MONTE-CARLO TEST-PARTICLE CODE. ALL THE COMPUTER SIMULATIONS WILL BE COMPARED WITH AND INTERPRET EXPERIMENTAL RESULTS. WE ALSO EXPECT THAT THESE CODES VALIDATED WITH OUR EXPERIMENTS CAN ALSO HELP TO SCALE THE LABORATORY RESULTS TO SPACE CONDITIONS, PROVIDING EXPLANATION AND PREDICTION FOR EXISTING AND FUTURE OBSERVATIONS. THE PROPOSED WORK IS DIRECTLY RELEVANT TO THE SCOPES OF THE SSW PROGRAM, WHICH ARE PLASMA INTERACTIONS WITH STRUCTURES AND BODIES, AND PROCESSES IN RING SYSTEMS AND THEIR INTERACTIONS WITH MAGNETOSPHERES. OUR WORK WILL HAVE BROAD IMPACT ON PLANETARY SCIENCE AND GEOPHYSICS COMMUNITIES AS WELL AS ROBOTIC AND HUMAN EXPLORATIONS. Other Administrative Action $0 2/6/20 Not listed ELECTROSTATIC DUST CHARGING AND TRANSPORT HAS BEEN SUGGESTED TO BE RESPONSIBLE FOR A NUMBER OF OBSERVED PHENOMENA ON THE SURFACES OF AIRLESS BODIES SUCH AS THE LUNAR HORIZON GLOW THE DUST PONDS ON ASTEROID EROS AND THE SPOKES IN THE SATURNS RINGS. IT MAY ALSO BE PARTIALLY RESPONSIBLE FOR RECENT ROSETTA COLLECTION OF DUST PARTICLES IN THE VICINITY OF COMET 67P AND PONDED DUST SEEN ON THE COMETS SURFACE. ELECTROSTATIC DUST ACTIVITIES POSE HAZARD TO ROBOTIC AND HUMAN EXPLORATIONS AS WELL AS INSTRUMENTS DEPLOYED ON THE SURFACE OF ANY AIRLESS PLANETARY OBJECT. THIS LONG-STANDING PROBLEM REMAINS UNRESOLVED HOW DUST PARTICLES COLLECT SUFFICIENT CHARGE AND BECOMEELECTROSTATICALLY LOFTED AND MOBILIZED ON THESE SURFACES. OUR RECENT EXPERIMENTAL RESULTS WITH THE NEWLY PROPOSED PATCHED CHARGE MODEL HAVE FUNDAMENTALLY CHANGED OUR VIEWS ON THE SURFACE DUST CHARGING AND TRANSPORT LAYING A FOUNDATION AND LEADING US TO A NEW DIRECTION FOR FURTHER INVESTIGATIONS.WE PROPOSE THE INTERTWINED COMBINATION OF LABORATORY EXPERIMENTS AND COMPUTER SIMULATIONS TO UNDERSTAND DUST CHARGING/LAUNCHING AND THE SUBSEQUENT DYNAMICS SELF-CONSISTENTLY. WE WILL ANSWER THE FOLLOWING SCIENCE QUESTIONS: WHAT IS THE CHARGE STATE OF THE MOBILIZEDDUST PARTICLES? WHAT IS THE ROLE OF COHESIVE FORCES IN DUST MOBILIZATION? WHAT CONTROLS THE LAUNCH AND SUBSEQUENT DYNAMICS (INCLUDING LEVITATION) OF THE DUST PARTICLES? AND HOW DO LARGE SURFACE ELECTRIC FIELDS REDISTRIBUTE DUST PARTICLES?DUST CHARGING AND TRANSPORT EXPERIMENTS WILL BE PERFORMED IN TWO EXISTING VACUUM CHAMBERS WITH VARIOUS PLASMA/UV CONDITIONS DUST SIZES SHAPES (IRREGULAR AND MICROSPHERE) AND COMPOSITIONS TO ADDRESS ALL THE OPEN QUESTIONS DESCRIBED ABOVE. THE PURCHASE OF A NEW CAMERA SYSTEM IS REQUESTED IN ORDER TO RESOLVE THE PARTICLE SIZE OF 10 MICRONS AND RECORD FULL DUST HOPPING TRAJECTORIES. DUSTCHARGING AND LAUNCH PROCESS WILL BE MODELED USING A TEST-PARTICLE APPROACH AND THE SUBSEQUENT DUST DYNAMICS WILL BE MODELED WITH A COMBINATION OF A CURVILINEAR PARTICLE-IN-CELL CODE CPIC AND A FORWARD MONTE-CARLO TEST-PARTICLE CODE. ALL THE COMPUTER SIMULATIONS WILL BE COMPARED WITH AND INTERPRET EXPERIMENTAL RESULTS. WE ALSO EXPECT THAT THESE CODES VALIDATED WITH OUR EXPERIMENTS CAN ALSO HELPTO SCALE THE LABORATORY RESULTS TO SPACE CONDITIONS PROVIDING EXPLANATION AND PREDICTION FOR EXISTING AND FUTURE OBSERVATIONS. THE PROPOSED WORK IS DIRECTLY RELEVANT TO THE SCOPES OF THE SSW PROGRAM WHICH ARE PLASMA INTERACTIONS WITH STRUCTURES AND BODIES AND PROCESSES IN RING SYSTEMS AND THEIR INTERACTIONS WITH MAGNETOSPHERES. OUR WORK WILL HAVE BROAD IMPACT ON PLANETARY SCIENCE ANDGEOPHYSICS COMMUNITIES AS WELL AS ROBOTIC AND HUMAN EXPLORATIONS. $0 1/17/20