Modelling CDA mass spectra |
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| Institution: | 1. Planetary and Space Sciences Research Institute, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK;2. Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany;1. Max-Planck-Institut für Kernphysik, Heidelberg, Germany, and HIGP, University of Hawaii, Honolulu, USA;2. University of California, Berkeley, USA;3. SETI Institute, Mountain View, USA;4. University of California, Berkeley, USA;5. Max-Planck-Institut für Kernphysik, Heidelberg, Germany;1. Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;2. Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba-shi, Ibaraki 305-8505, Japan;3. IHI Corporation, 3-1-1 Toyosu, Koto-ku, Tokyo 135-8710, Japan;1. Nuclear Physics Institute, 25068 ?e?, Czech Republic;2. Racah Institute of Physics, The Hebrew University, 91904 Jerusalem, Israel;1. Department of Electrical Engineering, Tshwane University of Technology Private Bag X680, Pretoria 0001, RSA;2. Laboratoire d’Electrotechnique et d’Electronique de Puissance de Lille, université Lille1 IRCICA, 50 Avenue Halley, 59650 Villeneuve d’Ascq France;1. GSI Helmholtzzentrum, Planckstrasse 1, 64291 Darmstadt, Germany;2. II. Physikalisches Institut, Justus-Liebig Universität Gießen, Heinrich-Buff-Ring 16, 35392 Gießen, Germany;3. Department of Physics and The Joint Institute for Nuclear Physics, University of Notre Dame, Notre Dame, IN 46556, USA;4. Department of Physics, Tohoku University, Sendai, Miyagi 980-8578, Japan;5. Institute for Analytical Instrumentation, RAS, St. Petersburg 198103, Russia |
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| Abstract: | We present the initial results from a simulation of ion behaviour within Cassini's cosmic dust analyser (CDA) instrument, using an in-house ion dynamics code. This work is to enable and enhance the detailed interpretation of dust impact ionisation mass spectra returned from the Saturnian system. Early work has already provided insights into the properties of the impact plasma in both low- and high-velocity impacts. We find that the isotropic emission of ions from the impact plasma successfully reproduces features seen in flight spectra and that the emitted ions have a higher range of energies (tens to hundreds of eV) than previously reported in some studies. Using these new ion characteristics, we have successfully modelled CDA flight mass spectra. |
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