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Physical properties of ices present in TNOs?

Physical properties of ices present in TNOs?. M.A. Satorre, M. Domingo, R. Luna, C. Millán, J. Cantó Escola Politècnica Superior d’Alcoi Universitat Politècnica de València. Contents. Experimental set-up and procedure Results

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Physical properties of ices present in TNOs?

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  1. Physical properties of ices present in TNOs? M.A. Satorre, M. Domingo, R. Luna, C. Millán, J. Cantó Escola Politècnica Superior d’Alcoi Universitat Politècnica de València

  2. Contents • Experimental set-up and procedure • Results • n, , pure molecules (N2, CH4, CO2) (Double laser and QCMB) • n for CO2 from ~ 270 to 650 nm (UV-Vis) • Tsubl for pure molecules and CO2 dominated (95 %) binary mixtures (TPD) • Summary

  3. Cryostat turbo pump secuvac ITR 90 Closed He-cycle (a) chamber squematic side view Si diodes rotary pump Cold finger ceravac Au substrat QCMB center three mixture prechamber gas inlet window Laser 1 N2 β (b) chamber squematic top view CO2 Other CH4 α Laser 2 Experimental Set-up and procedure Interference register

  4. Experimental Set-up and procedure

  5. Double laser technique and Quartz Crystal Microbalance (QCMB)

  6. Results: n, , pure molecules • Roux, J.A.; Wood, B.E.; Smith, A.M.; Plyer, R.R., (1979), Report Nº AEDC-TR-78-81, Defense Technical Information Center. • Tempelmeyer, K.E.; Mills, Jr., D.W., (1968), J. Appl. Phys., 39 (6), 2968-2969. • Warren, S.G. (1986), Applied Optics, 25, 16, 2650-2674.

  7. Results: n, , nitrogen Nitrogen * Roux, J.A.; Wood, B.E.; Smith, A.M.; Plyer, R.R., (1979), Report Nº AEDC-TR-78-81, Defense Technical Information Center.

  8. Results: n, , methane Methane * Roux, J.A.; Wood, B.E.; Smith, A.M.; Plyer, R.R., (1979), Report Nº AEDC-TR-78-81, Defense Technical Information Center.

  9. Results: n, , carbon dioxide Carbon Dioxide

  10. Interference with UV-Vis spectrometer

  11. Results: n, carbon dioxide at different 

  12. Results: n, carbon dioxide at different 

  13. Temperature Programmed Desorption with the mass spectrometer

  14. Results: Tsubl

  15. Results: Tsubl, CH4-CO2, N2-CO2 mixtures

  16. Summary • The index of refraction and density of pure Methane, Nitrogen and Carbon Dioxide is obtained at different deposition temperatures • Variation on the index of refraction at wavelengths from 250 till 650 nm are obtained • Changes on the characteristic temperature of sublimation for both methane and nitrogen codeposited with carbon dioxide are identified Acknowledgements -This research has been supported by “Ministerio de Ciencia y Tecnología” (AYA2004-05382) and FEDER founds

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