Simulation of ENA fluxes along the Geotail spacecraft orbit |
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| Institution: | 1. SLAC National Accelerator Laboratory, P.O. Box 20450, Stanford, CA 94309-0450, USA;2. Kavli Institute for Particle Astrophysics and Cosmology (KIPAC), Stanford University, 452 Lomita Mall, Stanford, CA 94309-4008, USA;3. University of Michigan, Randall Laboratory of Physics, 450 Church Street, Ann Arbor, MI 48109-1040, USA;4. National Research Nuclear University MEPhI (NRNU MEPhI), 31 Kashirskoe shosse, Moscow, 115409, Russia;5. University of Wisconsin-Madison, Department of Physics, 1150 University Avenue Room 2320, Chamberlin Hall, Madison, WI 53706-1390, USA;6. Imperial College London, Physics Department, Blackett Laboratory, Prince Consort Road, London, SW7 2BW, UK;7. Pacific Northwest National Laboratory, P.O. Box 999, Richland, WA 99352-0999, USA; non-LZ Collaboration, USA;8. South Dakota School of Mines and Technology, 501 East Saint Joseph Street, Rapid City, SD 57701-3901, USA;9. University of Maryland, Department of Physics, College Park, MD 20742-4111, USA;10. STFC Rutherford Appleton Laboratory (RAL), Didcot, OX11 0QX, UK;11. Lawrence Berkeley National Laboratory (LBNL), 1 Cyclotron Road, Berkeley, CA 94720-8099, USA;12. Fermi National Accelerator Laboratory (FNAL), P.O. Box 500, Batavia, IL 60510-5011, USA;13. SUPA, University of Edinburgh, School of Physics and Astronomy, Edinburgh, EH9 3FD, UK;14. University of California (UC), Berkeley, Department of Physics, 366 LeConte Hall MC 7300, Berkeley, CA 94720-7300, USA;15. Yale University, Department of Physics, 217 Prospect Street, New Haven, CT 06511-8499, USA;p. Lawrence Livermore National Laboratory (LLNL), P.O. Box 808, Livermore, CA 94551-0808, USA;q. University of Oxford, Department of Physics, Oxford, OX1 3RH, UK;r. University of Liverpool, Department of Physics, Liverpool, L69 7ZE, UK;s. Laboratório de Instrumentação e Física Experimental de Partículas (LIP), Department of Physics, University of Coimbra, Rua Larga, 3004-516, Coimbra, Portugal;t. Washington University in St. Louis, Department of Physics, One Brookings Drive, St. Louis, MO 63130-4862, USA;u. University of Alabama, Department of Physics & Astronomy, 206 Gallalee Hall, 514 University Boulevard, Tuscaloosa, AL 34587-0324, USA;v. South Dakota Science and Technology Authority (SDSTA), Sanford Underground Research Facility, 630 East Summit Street, Lead, SD 57754-1700, USA;w. Pennsylvania State University, Department of Physics, 104 Davey Lab, University Park, PA 16802-6300, USA;x. Brown University, Department of Physics, 182 Hope Street, Providence, RI 02912-9037, USA;y. University of South Dakota, Department of Physics, 414 East Clark Street, Vermillion, SD 57069-2307, USA;z. Northwestern University, Department of Physics & Astronomy, 2145 Sheridan Road, Evanston, IL 60208-3112, USA;1. University College London (UCL), Department of Physics and Astronomy, Gower Street, London, WC1E 6BT, UK;2. University of Rochester, Department of Physics and Astronomy, Rochester, NY 14627-0171, USA;3. University of California (UC), Davis, Department of Physics, One Shields Avenue, Davis, CA 95616-5270, USA;4. Brookhaven National Laboratory (BNL) P.O. Box 5000, Upton, NY 11973-5000, USA;5. University of California (UC), Santa Barbara, Department of Physics, Broida Hall, Santa Barbara, CA 93106-9530, USA;6. University of Massachusetts, Department of Physics, 1126 Lederle Graduate Research Tower (LGRT), Amherst, MA 01003-9337, USA;7. University of Sheffield, Department of Physics and Astronomy, Sheffield, S3 7RH, UK;8. IBS Center for Underground Physics (CUP), 70, Yuseong-daero 1689-gil, Yuseong-gu, Daejeon, Korea;9. University at Albany (SUNY), Department of Physics, 1400 Washington Avenue, Albany, NY 12222-1000, USA;10. Texas A&M University, Department of Physics and Astronomy, 4242 TAMU, College Station, TX 77843-4242, USA;11. Black Hills State University, School of Natural Sciences, 1200 University Street, Spearfish, SD 57799-0002, USA;1. Department of Electrical Engineering and Computer Science, Iwate University, Morioka 020-8551, Japan;2. The Nanoelectronics Research Institute, The National Institute of Advanced Industrial Science and Technology (AIST)-Tsukuba Central, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan |
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| Abstract: | Simulations of quiet time terrestrial H-ENA fluxes are shown. The simulations are obtained by using average proton differential fluxes from AMPTE-CCE/CHEM. A functional form which provides the ring current quiet time proton fluxes as a function of energy, L-shell and magnetic local time is also used. The energy neutral atom (ENA) fluxes are simulated at a specific location along the Geotail spacecraft orbit, where ENA data have been collected by the HEP-LD spectrometer. A detailed analysis of the ENA generation along the instrument look directions is presented, in order to evaluate the significance of the ENA signal with respect to the locations of ion sources and to the instrument energy resolution. At energies above 70 keV, we show that the ENA energy is directly related to the ion source location. |
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