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The MOF at South Pole

Italian-American Research Collaboration Amundsen-Scott Station December 2002 – January 2003. The MOF at South Pole. A collaboration between. Maui Scientific Research Center (University of New Mexico) Phd Stuart Jefferies Phd Wolfgang Finsterle Allister Knox Cinthya Gebienk.

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The MOF at South Pole

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  1. Italian-American Research Collaboration Amundsen-Scott Station December 2002 – January 2003 TheMOFatSouth Pole

  2. A collaborationbetween • Maui Scientific Research Center(University of New Mexico) • Phd Stuart Jefferies • Phd Wolfgang Finsterle • Allister Knox • Cinthya Gebienk • University of Roma “La Sapientia” • Prof. Alessandro Cacciani • Paolo Rapex • Vincenzo Di Martino • Berenice Subrizi

  3. Experiment Objectives • Seismically map the sound speed of the sun's lower atmosphere using high-frequency sound waves • Improve the models for the sun's atmosphere • Space Weather : early warning to explosive phenomena (flares, CME, …)

  4. Experiment Description The velocity and intensity signals are detected at two different heights in the solar atmosphere (two Magneto-Optical Filters tuned to the solar K and Na absorption lines ) The instrument has been given the name M O T H Magneto Optical filters at Two Heights

  5. Experiment Description • 2 MOFs tuned to the K (7699 A –D1) and Na(5890 A – D2) lines • Acquisition of separate and simultaneous images in the Red and Blue flanks of the above absorption lines • 2 compact Telescopes (48 mm diam) • 4 x 12-bit digital Cameras, running at 16 frames/s • 10 s integration time for each recorded 16 bit image • 1 TeraByte Raid Hard Disk recording System

  6. South Pole Remote site

  7. External Instrument Positioning

  8. The buried Control Room

  9. The MOTH

  10. Aligning and Focusing

  11. Hunting the Sun …

  12. The MOTH ‘s OpticalLayout

  13. The System Layout

  14. First results

  15. Sodium Red Red +Blu Blu Red –Blu Red+Blu

  16. Potassium Red Red +Blu Blu Red –Blu Red+Blu

  17. Potassium Sodium (D2) Velocity Signals

  18. Potassium Log Power Spectrum - m corrected

  19. Sodium Log Power Spectrum - m corrected

  20. Na-K average Cross Spectrum

  21. Time Lag Map @ 7 mHz(average: 27 seconds)

  22. Time Lag Map @ 3 mHz(average: 0 seconds)

  23. Acknowledgements • NSF (National ScienceFoundation) • Enea PNRA(Progetto Nazionale Ricerche Antartide)

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