1. PI: Dave McComas Co-Is: Peter BochslerMaciej BzowskiHans FahrHorst Fichtner Priscilla FrischHerb FunstenSteve FuselierMike Gruntman Vlad IzmodenovPaul KnappenbergerMarty LeeStefano Livi Don MitchellEberhard MöbiusTom MooreEd Roelof Nathan SchwadronPeter WurzGary Zank Collaborators: Frederic AllegriniMike CollierGeorge GloecklerDavid Hollenbach Dan ReisenfeldMartin WieserManfred Witte PI: Dave McComas Co-Is: Peter BochslerMaciej BzowskiHans FahrHorst Fichtner Priscilla FrischHerb FunstenSteve FuselierMike Gruntman Vlad IzmodenovPaul KnappenbergerMarty LeeStefano Livi Don MitchellEberhard MöbiusTom MooreEd Roelof Nathan SchwadronPeter WurzGary Zank Collaborators: Frederic AllegriniMike CollierGeorge GloecklerDavid Hollenbach Dan ReisenfeldMartin WieserManfred Witte Presented by: Dave McComas Southwest Research Institute San Antonio, Texas on Behalf of the IBEX Science Team Presented by: Dave McComas Southwest Research Institute San Antonio, Texas on Behalf of the IBEX Science Team

2. The Sun and Local Interstellar Medium (LISM) Image courtesy of L. Huff/P. Frisch

3. Our Heliosphere

4. ENA Observations Image the 3-D Heliosphere

5. IBEX’s Sole, Focused Science Objective ■IBEX’s sole, focused science objective is to discover the global interaction between the solar wind and the interstellar medium. ■IBEX achieves this objective by taking a set of global energetic neutral atom (ENA) images that answer four fundamental science questions: I.What is the global strength and structure of the termination shock? II.How are energetic protons accelerated at the termination shock? III.What are the global properties of the solar wind flow beyond the termination shock and in the heliotail? IV.How does the interstellar flow interact with the heliosphere beyond the heliopause?

6. Global ENA Images and Energy Spectra Extremes of differential ENA fluxes from 0.3-0.6 keV predicted for a strong gas-dynamical TS (top) and a TS weakened by a large pickup ion pressure (bottom) [Gruntman et al., 2001]. Predicted ENA distributions near HSp nose for strong (black) and weak (green) TS [Gruntman et al., 2001]. ENAs >1 keV are accelerated inner heliosheath protons based on projecting observed distributions beyond TS.

7. IBEX S/C: Simple Sun-Pointed Spinner

8. IBEX Payload CEU: ■Provides electronic support and control for payload ■Developed by SwRI IBEX-Lo: ■Energy range: 0.01-2 keV ■Team: LMATC (Lead), UNH, GSFC, APL IBEX-Hi: ■Energy range: 0.3-6 keV ■Team: LANL (Lead), UNH, SwRI

9. Mission Design Maximizes Heliospheric Viewing Routine Operations ■Nominal orbit – 37 Re x 7000 km altitude, ~5 days per orbit ■Sun-pointing spinning S/C (4 rpm) ■Science Observations > 10 Re ■Engineering < 10 Re ●Data download and command upload ●Adjust spin axis ~5° (Earth’s orbital motion) ■Nearly full sky viewing each 6 months Earth’s Magnetosphere

10. Integration of IBEX Payload IBEX-Lo IBEX-Hi CEU

11. Launch Operations ■Launch operations ● Standard Pegasus XL ■Orbit raising ● STAR-27 Solid Rocket Motor (SRM) burn raises apogee to 37 R E ● S/C hydrazine system boosts perigee to 7000 km

12. Lead Institutional Responsibilities SwRI: CEU Southwest Research Institute: PI Institution Spacecraft Segment Payload Segment OSC: Spacecraft ATK: Solid Rocket Motor LMATC: IBEX Lo LANL: IBEX Hi Ground Segment Various Institutions: Science Team Adler Planetarium: E/PO OSC: MOC SwRI: ISOC

13. Broad Science Opportunities ■Critical new heliospheric observations ■$ 2M IBEX-funded GI program ● NASA peer-reviewed and selected ● Supports researchers outside of IBEX science team ■Astrophysical connections ● Composition of LISM ● Heliosphere – Astrosphere comparisons  ground truth ● Team astrophysicists help ensure broad astrophysics connections ■High sensitivity magnetospheric ENA observations

14. Relevant to Exploration: GCR Shielding

15. Interstellar Boundary Explorer Imaging the Edge of Our Solar System and Beyond Interstellar Boundary Explorer – IBEX It is time for IBEX’s breakthrough mission of exploration and discovery beyond the planets! Any Questions?