Computer Science – Performance
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm42b06t&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SM42B-06
Computer Science
Performance
2772 Plasma Waves And Instabilities, 2794 Instruments And Techniques, 7524 Magnetic Fields, 7835 Magnetic Reconnection, 7871 Waves And Instabilities
Scientific paper
Turbulent plasma motions have been observed to accompany the process of magnetic reconnection in the Magnetic Reconnection Experiment. Probe measurement shows large amplitude fluctuations with broad spectrum to be present during reconnection. These fluctuations may contain a clue to the nature of the anomalous resistivity responsible for the fast non-classical reconnection of the magnetospheric and coronal magnetic fields. However, the identification of the nature of the instability and its propagation properties with probes is made extremely complicated due to the lack of data on the orientation of the three-dimensional wavevector. The Planar Laser-Induced Fluorescence (PLIF) Imaging technique provides a possibility to obtain 2-dimensional images of metastable ion density with high spatial resolution with exposure times of a fraction of the characteristic time scale of the fluctuations of interest. Equilibrium profiles of the ion density obtained with PLIF in MRX are compared to probe data and theoretical Harris equilibrium. PLIF image pairs obtained with a two-frame capable imager allow background emission subtraction and are expected to achieve theoretical photon-statistics-limited noise performance. The images will reveal the mode patterns of the density fluctuations. By showing turbulent wavefronts in 2D the PLIF images will provide wavenumber information in unprecedented detail and at least partially remove the uncertainty in the propagation measurement by probes.
Carter Thomas
Ji Hantao
Levinton F. M.
Trintchouk F.
Yamada Mitsuru
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