GGrantIndex
← Search

OVER THE PAST DECADE NANOMETER SIZED DUST GRAINS ( NANODUST ) HAVE BECOME AN INTENSE AREA OF RESEARCH DUE TO THEIR DETECTION IN VARIOUS SPACECRAFT RADIO WAVE ANTENNA DATASETS AS TRANSIENT VOLTAGE SPIKES . NANODUST GRAINS ARE PRESUMED TO ORIGINATE WITHIN 1 AU IN THE INNER HELIOSPHERE DUE TO EITHER THE COLLISIONAL EVOLUTION OF THE INTERPLANETARY METEOROID COMPLEX OR THE IMPULSIVE DISRUPTION OF COMETARY AND/OR ASTEROIDAL BODIES. UPON CREATION NANODUST GRAINS COUPLE STRONGLY TO THE INTERPLANETARY PLASMA AND MAGNETIC FIELD ENVIRONMENT (I.E. THE SOLAR WIND) DUE TO THEIR RELATIVELY HIGH CHARGE-TO-MASS RATIO. BOTH THE MORPHOLOGY AND THE VARIABILITY OF THE INTERPLANETARY PLASMA AND FIELD ENVIRONMENT PLAY A SIGNIFICANT ROLE IN DETERMINING THE DYNAMICS AND EVOLUTION OF NANODUST GRAINS. PREVIOUS RESEARCH HAS SHOWN THAT THE SOLAR WIND CAN ACCELERATE NANODUST GRAINS AWAY FROM THE SUN AT SPEEDS OF SEVERAL HUNDREDS OF KILOMETERS PER SECOND. HOWEVER IT IS NOT WELL-UNDERSTOOD HOW LARGE-SCALE STRUCTURES IN THE SOLAR WIND MAY INFLUENCE NANODUST OBSERVATIONS AT 1 AU SPATIALLY AND TEMPORALLY NOR WHAT THE IMPLICATIONS OF THESE STRUCTURES FOR THE PRODUCTION AND DISTRIBUTION OF NANODUST IN THE INNER HELIOSPHERE ARE. FURTHER RESEARCH INTO THE DYNAMICS OF NANODUST IS REQUIRED ESPECIALLY WITH REGARDS TO THE TEMPORAL VARIABILITY IN THE INTERPLANETARY ENVIRONMENT AND THE EFFECTS OF SUCH VARIABILITY ON THE SIZE CHARGE AND DYNAMICS OF NANODUST.

$169,199FY2020National Aeronautics and Space AdministrationNASA

Regents Of The University Of California, The

Investigators

View source on USAspending →