Payload Water Detection, Deceleration and Camera

1. Payload Water Detection, Deceleration and Camera John Polansky

2. Presentation Outline • Payload Requirements • Expectations • Water Detection Methods • Impact Dynamics • Camera Options John Polansky

3. Requirements • “Shall make two water measurements…” • Primary water experiment • Secondary water experiment • “Measure depth of penetration…” • Measure acceleration profile • “Shall have a B/W camera…” John Polansky

4. Expectations Ref: NASA, GFSD, SVS • How much water? • Possible range from 70 to 750 ppm • What state of water? • Physorbed or chemisorbed John Polansky

5. Primary Water Experiment Ref: Mars Laser Hygrometer, Webster et al Tuneable Laser Diode Absorption Spectrometer (TDLAS) Flight rated Laser tuned to 1.37 μm 1000 g impact rating 5 W, 0.25 kg, 125 cm3 John Polansky

6. Absorptivity P Po Ref: CarlosRC, Wikipedia • Beer’s Law P0 = Transmitted power P = Received power ε = Molar absorptivity l = Path length c = Species concentration John Polansky

7. Secondary Water Experiment 7 cm Ref: MoonLITE mission update, Gowen • Instrument options • Ion trap spectrometer • Quadrupole Mass Spectrometer Array (QMSA) • Force Detected Nuclear Magnetic Resonance Spectrometer (FDNMR) • Zeolite water experiment John Polansky

8. Accelerometer Ref: Endevco.com Endevco 2225 piezoelectric accelerometer Flight rated Shock rated to 20,000 g Outputs a capacitance Requires no power input 0 W, 13 g, 3 cm3 John Polansky

9. Camera John Polansky

10. Future Work • Select secondary water experiment • Determine camera requirements • Select camera mission • Select camera resolution • Select suitable camera • Begin preliminary sizing of all instruments John Polansky

11. Schedule John Polansky

12. Questions?