31st Annual Meeting of the DPS, October 1999
Session 40. Dust
Contributed Oral Parallel Session, Thursday, October 14, 1999, 8:30-9:40am, Sala Kursaal

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[40.06] Initial measurements with the dust detector onboard Cassini

R. Srama, A. Graps, E. Gruen, S. Helfert, S. Kempf, H. Krueger (Max-Planck-Institut fuer Kernphysik), CDA-dust-science Team

During 85 days of operation CDA (DOY 84 to DOY 169, 1999) recorded 33 highly reliable impact events including one impact with a high quality mass spectrum and 5824 noise events. The impact rate during the inner planetary cruise is compared with the calculated count rates of the Divine-Staubach model. During approach to th Sun, a slight increase of the CDA count rate from about 2 impacts per week to 3 impacts per week was observed. According to the model, before Venus 2 encounter until DOY 140, interstellar dust flux tops the interplanetary dust flux. After that time, interplanetary dust should be the dominant component in the CDA measurements. The observed impact rate supports this picture although the measured impact rate is somewhat lower than the combined interstellar plus interplanetary model flux but higher than the interplanetary flux alone. Therefore, the measurements suggest that a significant portion of the interstellar dust flux reaches the region inside the Earth's orbit.

If you would like more information about this abstract, please follow the link to http://galileo.mpi-hd.mpg.de/~cassini. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: ralf.srama@mpi-hd.mpg.de

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