SUPERTHERMAL PARTICLES AS PART OF POWER-LAW DISTRIBUTIONS ARE OBSERVED THROUGHOUT THE UNIVERSE IN MANY DIFFERENT ASTROPHYSICAL CONTEXTS. WHILE THESE SUPERTHERMAL PARTICLES HAVE BEEN OBSERVED THERE IS NOT A CLEAR CONSENSUS ON THE GENERATION MECHANISM. WE PROPOSE TO INVESTIGATE ONE SUCH MECHANISM MAGNETIC PUMPING WHERE A SERIES OF EITHER PERIODIC OR RANDOM MAGNETIC FLUCTUATIONS HEAT A PLASMA. WHILE IT IS WELL KNOWN THAT PLASMA CAN BE HEATED BY WAVES MOST THEORIES OF WAVE-PARTICLE ENERGIZATION MECHANISMS ARE BASED ON RESONANCES WHICH ARE ONLY EFFECTIVE AT PARTICLE VELOCITIES NEAR THE PHASE OF THE WAVE V ~ W/K MEANING THAT SOME OTHER MECHANISM SUCH AS DIFFUSIVE SHOCK ACCELERATION OR MAGNETIC RECONNECTION WOULD HAVE TO BE RESPONSIBLE FOR THE FORMATION OF THE POWER-LAW DISTRIBUTIONS. MEANWHILE GIVEN COMPRESSIONAL ALFVENIC TURBULENCE CAN MAGNETICALLY TRAP PARTICLES THE NEW GENERALIZED MODEL FOR MAGNETIC PUMPING INVESTIGATED HERE THEN BECOMES EFFECTIVE FOR V>W/K AS WELL. WE SUSPECT THAT THIS RESULT COULD PROVE TRANSFORMATIVE TO OUR UNDERSTANDING OF HOW THE MOST ENERGETIC PARTICLES IN THE UNIVERSE ARE GENERATED. WHILE THERE IS A WIDE VARIETY OF ASTROPHYSICAL PHENOMENA WHERE MAGNETIC PUMPING COULD COME INTO PLAY THIS PROPOSAL FOCUSES ON THE PLASMA PRECEDING THE EARTH'S BOW SHOCK CALLED THE ELECTRON FORESHOCK. AS IS THE CASE IN MANY COLLISIONLESS SHOCKS IN THE FORESHOCK THERE EXISTS STRONG MAGNETIC PERTURBATIONS THAT ARE IDEAL FOR OBSERVING MAGNETIC PUMPING. WHILE WE HAVE ALREADY DEVELOPED A BASIC MODEL FOR MAGNETIC PUMPING THE STRONG MAGNETIC PERTURBATIONS IN THE ELECTRON FORESHOCK ALLOW IT TO ACT AS A NATURAL LABORATORY TO TEST AND DEVELOP A MORE GENERAL MODEL FOR THE MAGNETIC PUMPING MECHANISM INCLUDING THE ALL-IMPORTANT MAGNETIC TRAPPING. THE PRIMARY OBJECTIVE OF THIS PROPOSAL IS TO VERIFY THAT MAGNETIC PUMPING IS AN IMPORTANT PARTICLE ENERGIZATION MECHANISM THAT IS AT WORK IN THE REGIME WHERE V>W/K AND TO USE MMS DATA FORM THE BOW SHOCK REGION TO TEST AND REFINE THE MODEL. METHODS: IN ORDER TO DETERMINE THAT MAGNETIC PUMPING IS AT WORK IN THE EARTH'S BOW SHOCK WE DEVELOPED AN ANALYTICAL MODEL OF HOW THE VELOCITY DISTRIBUTION FUNCTION SHOULD EVOLVE WHEN MAGNETIC PUMPING IS AT PLAY. WE PLAN TO COMPARE THE RESULTS OF THIS ANALYTIC MODEL WITH VELOCITY DISTRIBUTION FUNCTIONS OBTAINED FROM THE MAGNETOSPHERIC MULTI-SCALE MISSION (MMS) A CLUSTER OF FOUR SATELLITES THAT ARE ORBITING EARTH. DATA HAS BEEN RECORDED BY MMS DURING HUNDREDS OF BOW SHOCK CROSSINGS. THE TEMPORAL RESOLUTION OF THE ELECTRON AND ION VELOCITY DATA AS WELL AS THE CLOSE PROXIMITY OF THE SPACECRAFT TO EACH OTHER HAS ALREADY ALLOWED THE SMALL-SCALE PHYSICS IN THE SHOCK TO BE MORE ACCURATELY QUANTIFIED. SIGNIFICANCE: THE MODEL FOR PARTICLE HEATING BY MAGNETIC PUMPING IS GENERALLY APPLICABLE AND COULD BE TRANSFORMATIVE TO OUR UNDERSTANDING OF HOW THE MOST ENERGETIC PARTICLES ARE GENERATED IN THE UNIVERSE. HEAVY ION DISTRIBUTIONS IN THE SOLAR CORONA COSMIC RAYS IN THE INTERSTELLAR MEDIUM THE ANOMALOUS HEATING IN THE SOLAR WIND AMONG MANY OTHER PHENOMENA COULD POTENTIALLY BE EXPLAINED BY MAGNETIC PUMPING. ADDITIONALLY THIS PROPOSAL IS HIGHLY RELEVANT TO NASA'S HELIOPHYSICS STRATEGIC OBJECTIVES INCLUDING GOALS 1 AND 4 FOR SOLAR AND HELIOSPHERIC PHYSICS IN THE LAST DECADAL SURVEY: GOAL 1: DETERMINE THE ORIGINS OF THE SUNS' ACTIVITY AND PREDICT THE VARIATIONS IN THE SPACE ENVIRONMENT. GOAL 4: DISCOVER AND CHARACTERIZE FUNDAMENTAL PROCESSES THAT OCCUR BOTH WITHIN THE HELIOSPHERE AND THROUGHOUT THE UNIVERSE