The Jupiter Helium Interferometer Experiment on the Galileo Entry Probe



We discuss the scientific objective, instrument design, and calibration of a miniaturized Jamin—Mascart interferometer which is to perform an accurate measurement of the refractive index of the Jovian atmosphere in the pressure range 2.5 to 10 bar. The instrument is to perform this measurement in December 1995 aboard the entry probe of the NASA Galileo spacecraft. From the data obtained the mole fraction of helium in the atmosphere of Jupiter is to be calculated with an estimated uncertainty of ± 0.0015. The instrument has a total mass of 1.4 kg and consumes 0.9 W of electrical power.


Light Emit Diode Giant Planet Helium Abundance Entry Probe Jovian Atmosphere 
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  1. Conrath, B. J., Gautier, D., Hanel, R. A., and Hornstein, J. S.: 1984, ‘The Helium Abundance of Saturn from Voyager Measurements’, Astrophys. J. 282, 807.ADSCrossRefGoogle Scholar
  2. Conrath, B., Gautier, D., Hanel, R., Lindal, G., and Marten, A.: 1987, ‘The Helium Abundance of Uranus from Voyager Measurements’, J. Geophys. Res. 92, 15003.ADSCrossRefGoogle Scholar
  3. Gough, D. O.: 1983, in P. A. Shaver, D. Kunth, and K. Kjär (eds.), ‘The Protosolar Helium Abundance’, Proceedings of the ESO Workshop on Primordial Helium, ESO, ISBN 3–923524–16–1, pp. 117–136.Google Scholar
  4. Hubbard, W. B.: 1989, in S. K. Atreya, J. B. Pollack, and M. S. Matthews (eds.), ‘Structure and Composition of Giant Planet Interiors’, Origin and Evolution of Planetary and Satellite Atmospheres, University of Arizona Press, Tucson, pp. 539–563.Google Scholar
  5. Jenkins, F. A. and White, H. E.: 1976, Fundamentals of Optics, 4th ed., McGraw-Hill, New York.Google Scholar
  6. Lewis, J. S.: 1974, ‘The Chemistry of the Solar System’, Sci. Amer. 230(3), 50.ADSCrossRefGoogle Scholar
  7. Lorentz, H. A.: 1909, The Theory of Electrons, Teubner, Leipzig.Google Scholar
  8. Mascart, M.: 1874, ‘Sur les modifications qu’éprouve la lumière par suite du mouvement de la source lumineuse et du mouvement de l’observateur’, Ann. Sci. l’Ecole Normale Sup. 3, 363.MathSciNetzbMATHGoogle Scholar
  9. Mett, W.: 1980, ‘Entwicklung strahlenresistenter opto-elektronischer Bauteile für den Einsatz am Jupiter’, Ph.D. Thesis, University of Bonn, Bonn.Google Scholar
  10. NASA Document JP-512.03: 1979, Science Instruments and Related Requirements; Test Program, Revision 4, 1 November, 1979.Google Scholar
  11. Orton, G. S. and Ingersoll, A. P.: 1976, in T. Gehreis (ed.), ‘Pioneer 10 and 11 and Ground-Based Infrared Data on Jupiter: The Thermal Structure and He–H2 Ratio’, Jupiter, University of Arizona Press, Tucson, pp. 207–215.Google Scholar
  12. Pagel, B. E. J.: 1989, in J. Beckman and B. E. J. Pagel (eds.), ‘Evolution of 4He in Galaxies’, Evolutionary Phenomena in Galaxies, Cambridge University Press, Cambridge.Google Scholar
  13. Paul, W., Anton, F., Paul, L., Paul, S., and Mampe, W.: 1989, ‘Measurement of the Neutron Lifetime in a Magnetic Storage Ring’, Z. Phys. C45, 230.Google Scholar
  14. Podolak, M. and Cameron, A. G. W.: 1975, ‘Further Investigations of Jupiter Models’, Icarus 25, 627.ADSCrossRefGoogle Scholar
  15. Salpeter, E. E.: 1973, ‘On Convection and Gravitational Layering in Jupiter and in Stars of Low Mass’, Astrophys. J. 181, 183.CrossRefGoogle Scholar
  16. Schütze, H.: 1986, ‘Ein Refraktometer zur interferometrischen Bestimmung der Heliumhäufigkeit in der Jupiteratmosphäre’, Ph.D. Thesis, University of Bonn, Bonn.Google Scholar
  17. Schulte, W.: 1983, ‘Ein Jamin-Interferometer zur Bestimmung der Häufigkeit von Helium in der Atmosphäre des Jupiters’, Ph.D. Thesis, University of Bonn, Bonn.Google Scholar
  18. Shaver, P. A., Kunth, D., and Kjär, K. (eds.): 1983, Proceedings of the ESO Workshop on Primordial Helium, ESO, ISBN 3–923524–16–1.Google Scholar
  19. Smoluchowski, R.: 1967, ‘Internal Structure and Energy Emission of Jupiter’, Nature 215, 691.ADSCrossRefGoogle Scholar
  20. Stix, M.: 1989, The Sun, Springer-Verlag, Berlin.CrossRefGoogle Scholar
  21. von Zahn, U. and Hoffmann, H.-J.: 1976, Jupiter Helium Abundance Interferometer Experiment, Proposal to NASA for participation in the Juper Orbiter Probe 1981/1982 Mission.Google Scholar
  22. Yang, J., Turner, M., Steigman, G., Schramm, D., and Olive, K.: 1984, ‘Primordial Nucleosynthesis: A Critical Comparison of Theory and Observation’, Astrophys. J. 281, 493.ADSCrossRefGoogle Scholar

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© Springer Science+Business Media Dordrecht 1992

Authors and Affiliations

  1. 1.University of BonnBonnGermany
  2. 2.University of ArizonaTucsonUSA

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