THIS PROPOSAL SEEKS RENEWAL OF THE HELIOPHYSICS GUEST INVESTIGATION GRANT HELD BY L. A. FISK AND G. GLOECKLER THE PURPOSE OF WHICH ISTO DETERMINE THE GLOBAL STRUCTURE OF THE HELIOSHEATH AND ITS GOVERNING PHYSICAL PROCESSES AND WHERE POSSIBLE TO APPLY THE RESULTS OF THISRESEARCH TO OTHER ASTROPHYSICAL SETTINGS. THE RESEARCH TO BE CONDUCTED IS INTENDED TO MAXIMIZE THE SCIENTIFIC RETURN FROM THE VOYAGERMISSION AND FROM THE ENERGETIC NEUTRAL ATOM (ENA) OBSERVATIONS FROM IBEX AND CASSINI. DURING THE CURRENT AND A PREVIOUSFUNDING PERIOD WE DEVELOPED A NEW ACCELERATION MECHANISM A PUMP ACCELERATION MECHANISM THAT CAN ACCOUNT FOR THE SPECTRA OFLOWER-ENERGY PARTICLES OBSERVED DOWNSTREAM FROM THE TERMINATION SHOCK BY BOTH VOYAGERS: DIFFERENTIAL INTENSITY SPECTRA THAT ARE APOWER LAW WITH A CONSTANT SPECTRAL INDEX OF -1.5. APPLIED THE PUMP ACCELERATION MECHANISM TO THE ACCELERATION OF ANOMALOUS COSMICRAYS (ACRS) IN THE OUTER HELIOSHEATH AND SHOWED THAT IT CAN ACCOUNT FOR THE OBSERVED ACR SPECTRA PROVIDED THAT THE VELOCITY OF THETURBULENCE INCREASES BY ~150 KM S-1 IN A BROAD REGION AROUND THE HELIOPAUSE. SHOWED THAT THE INCREASE IN TURBULENT VELOCITIES ISNECESSARY TO ACCOUNT FOR THE LOW-ENERGY ENA OBSERVATIONS FROM IBEX WHICH PROVIDES STRONG EVIDENCE THAT THE HELIOPAUSE IS A VERYTURBULENT REGION. SHOWED THAT INCREASED TURBULENCE AROUND THE HELIOPAUSE PROVIDES A NATURAL EXPLANATION FOR THE RECENT VOYAGER1 OBSERVATIONS BASED UPON ENERGETIC PARTICLE ANISOTROPY MEASUREMENTS THAT THE CONVECTION SPEED OF THE PARTICLES BECOMES NEGATIVEIN THE OUTER HELIOSHEATH. APPLIED OUR PUMP ACCELERATION MECHANISM TO OTHER SETTINGS IN THE HELIOSPHERE PROVIDING GOOD AGREEMENTWITH OBSERVATION AND TO THE INTERSTELLAR MEDIUM WHERE WE ARE ABLE TO ACCELERATE GALACTIC COSMIC RAYS (GCRS) UP TO ENERGIES OF ~ 1018EV. DURING THE RENEWAL WE PLAN TO CONTINUE TO MONITOR THE OBSERVATIONS FROM VOYAGER 1 AS IT APPROACHES THE HELIOPAUSE ANDFROM VOYAGER 2 AS IT PENETRATES DEEPER INTO THE HELIOSHEATH TO DETERMINE WHETHER THE PREDICTION THAT WE HAVE MADE THAT THE REGIONAROUND THE HELIOPAUSE IS HIGHLY TURBULENT IS VALID OR NEEDS REFINEMENTS. APPLY THE TECHNIQUES THAT WE DEVELOPED FOR INTERPRETING THELOW-ENERGY IBEX ENA OBSERVATIONS TO PROBE THE REGION BEYOND THE HELIOPAUSE. CONSIDER THE PHYSICAL MECHANISMS THAT CAN LEAD TOENHANCED TURBULENCE AROUND THE HELIOPAUSE. EXTEND OUR PUMP ACCELERATION MECHANISM TO INCLUDE ELECTRONS AND CONSIDER ELECTRONPROPAGATION IN ENHANCED TURBULENCE TO PERFORM A SYSTEMATIC STUDY OF HIGH-ENERGY ELECTRON BEHAVIOR IN THE HELIOSHEATH. STUDYIN MORE DETAIL THE MEANS BY WHICH GCRS CAN PENETRATE THROUGH THE TURBULENT REGION AROUND THE HELIOPAUSE AND THE LEVEL OF GCRMODULATION THAT RESULTS. USE OUR INCREASING KNOWLEDGE OF THE GLOBAL STRUCTURE OF THE HELIOSHEATH AND OF THE ACCELERATION PROCESSESOCCURRING THEREIN TO OFFER AN EXPLANATION FOR THE SO-CALLED RIBBON OF ENHANCED LOW-ENERGY ENAS OBSERVED BY IBEX AS WELL AS THE SOCALLEDBELT OF HIGHER-ENERGY ENAS OBSERVED BY CASSINI.