Measuring Reconnection Electric Fields on MMS: The Double Probe Technique

Details Measuring Reconnection Electric Fields on MMS: The Double Probe Technique Measuring Reconnection Electric Fields on MMS: The Double Probe Technique

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm23a0394e&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SM23A-0394

Physics

2712 Electric Fields (2411), 2723 Magnetic Reconnection (7526, 7835), 2724 Magnetopause And Boundary Layers, 7526 Magnetic Reconnection (2723, 7835), 7835 Magnetic Reconnection (2723, 7526)

Scientific paper

One of the major scientific goals of the Magnetospheric MultiScale mission is to understand the fluid and kinetic properties of magnetic reconnection. Such a scientific advance requires accurate measurements of the electric and magnetic fields in a rapidly changing plasma environment. In particular, the difference between the plasma flow and ExB, the parallel electric field, and the plasma wave environment need to be determined. The dc electric fields need to be measured to an accuracy of ~1 mV/m in the sub-solar and magnetotail reconnection regions to test and improve the current theoretical and numerical treatments. We present a conceptual design of a three-axis double probe electric field instrument for the Magnetospheric MultiScale mission and discuss the sources of measurement error. The design is compared to those on Cluster II, Polar, and FAST. Quasi self-consistent simulations of spacecraft potentials and photoelectron fluxes are used to quantify errors from the relative orientation of the sun, flow velocity, and he magnetic field direction. The MMS double probe instrument will be developed in a coordinated effort between the Royal Institute of Stockholm, the University of Colorado, and the University of New Hampshire.

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