SMS-STICS-VDF-MAGNETOSPHERE>SMS Magnetosphere & Suprathermal Ion Composition Investigation VDF magnetosphere 

The Suprathermal Ion Composition Spectrometer (STICS) is a time of flight (TOF) plasma mass spectrometer, capable of identifying mass and mass per charge for incident ions up to 200 keV/e. It uses an electrostatic analyzer to admit ions of a particular energy per charge (E/Q) into the TOF chamber. The E/Q voltage is stepped through 32 values, sitting at each value for approximately 24 sec., to measure ions over the full E/Q range of 6 - 200 keV/e. Ions then pass through a carbon foil and TOF chamber, before finally impacting on a solid-state detector (SSD) for energy measurement. STICS combines these three measurements of E/Q, TOF and residual energy, producing PHA words. This triple-coincidence technique greatly improves the signal to noise ratio in the data. Measurements of E/Q and TOF without residual energy also produce PHA words. These double-coincidence measurements are characterized by better statistics since ions whose energy does not allow them to be registered by the SSD can still be counted in double-coincidence measurements. However, ion identification in double-coincidence measurements are limited to a select number of ions that are well separated in E/Q - TOF space.  The STICS instrument provides full 3D velocity distribution functions, through a combination of multiple telescopes and spacecraft spin. The instrument includes 3 separate TOF telescopes that view 3 separate latitude sectors, as shown in Figure 1. In addition, the WIND spacecraft spins, allowing the 3 telescopes to trace out a nearly 4�� steradian viewing area. The longitudinal sectors are shown in Figure 2. The solar direction is in sectors 8-10 while the earthward direction is in sectors 0-2.

Magnetosphere and Suprathermal Ion Composition  Instrument, Key Parameters

[no plot] Full 3-D VDF in phase space density for triple coincidence H+

Phase space density value triple coincidence H+ - summed over telescope and sector

Phase space density value triple coincidence H+ - summed over telescope and eoq

Phase space density value triple coincidence H+ - summed over telescope and eoq (sorted sector)

[no plot] Error in velocity distribution function value triple coincidence H+

Counts for triple coincidence H+ - summed over telescope and sector

Counts for triple coincidence H+ - summed over telescope and eoq

Counts for triple coincidence H+ - summed over telescope & eoq (sorted sector)

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence H+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence H+

Differential flux, dJ/dE triple coincidence H+ - summed over telescope and sector

Differential flux, dJ/dE triple coincidence H+ - summed over telescope and eoq

Differential flux, dJ/dE triple coincidence H+ - summed over telescope and eoq (sorted sector)

[no plot] Error in the differential flux value triple coincidence H+

[no plot] Full 3-D VDF in phase space density for triple coincidence He+

Phase space density value triple coincidence He+ - summed over telescope and sector

Phase space density value triple coincidence He+ - summed over telescope and eoq

Phase space density value triple coincidence He+ - summed over telescope and eoq (sorted sector)

[no plot] Error in velocity distribution function value triple coincidence He+

Counts for triple coincidence He+ - summed over telescope and sector

Counts for triple coincidence He+ - summed over telescope and eoq

Counts for triple coincidence He+ - summed over telescope and eoq (sorted sector)

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence He+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence He+

Differential flux, dJ/dE triple coincidence He+ - summed over telescope and sector

Differential flux, dJ/dE triple coincidence He+ - summed over telescope and eoq

Differential flux, dJ/dE triple coincidence He+ - summed over telescope and eoq (sorted sector)

[no plot] Error in the differential flux value triple coincidence He+

[no plot] Full 3-D VDF in phase space density for triple coincidence He2+

Phase space density value triple coincidence He2+ - summed over telescope and sector

Phase space density value triple coincidence He2+ - summed over telescope and eoq

Phase space density value triple coincidence He2+ - summed over telescope and eoq (sorted sector)

[no plot] Error in velocity distribution function value triple coincidence He2+

Counts for triple coincidence He2+ - summed over telescope and sector

Counts for triple coincidence He2+ - summed over telescope and eoq

Counts for triple coincidence He2+ - summed over telescope and eoq (sorted sector)

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence He2+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence He2+

Differential flux, dJ/dE triple coincidence He2+ - summed over telescope and sector

Differential flux, dJ/dE triple coincidence He2+ - summed over telescope and eoq

Differential flux, dJ/dE triple coincidence He2+ - summed over telescope and eoq (sorted sector)

[no plot] Error in the differential flux value triple coincidence He2+

[no plot] Full 3-D VDF in phase space density for triple coincidence O+

Phase space density value triple coincidence O+ - summed over telescope and sector

Phase space density value triple coincidence O+ - summed over telescope and eoq

Phase space density value triple coincidence O+ - summed over telescope and eoq (sorted sector)

[no plot] Error in velocity distribution function value triple coincidence O+

Counts for triple coincidence O+ - summed over telescope and sector

Counts for triple coincidence O+ - summed over telescope and eoq

Counts for triple coincidence O+ - summed over telescope & eoq (sorted sector)

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence O+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence O+

Differential flux, dJ/dE triple coincidence O+ - summed over telescope and sector

Differential flux, dJ/dE triple coincidence O+ - summed over telescope and eoq

Differential flux, dJ/dE triple coincidence O+ - summed over telescope and eoq (sorted sector)

[no plot] Error in the differential flux value triple coincidence O+

[no plot] Full 3-D VDF in phase space density for triple coincidence O6+

Phase space density value triple coincidence O6+ - summed over telescope and sector

Phase space density value triple coincidence O6+ - summed over telescope and eoq

Phase space density value triple coincidence O6+ - summed over telescope and eoq (sorted sector)

[no plot] Error in velocity distribution function value triple coincidence O6+

Counts for triple coincidence O6+ - summed over telescope and sector

Counts for triple coincidence O6+ - summed over telescope and eoq

Counts for triple coincidence O6+ - summed over telescope & eoq (sorted sector)

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence O6+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence O6+

Differential flux, dJ/dE triple coincidence O6+ - summed over telescope and sector

Differential flux, dJ/dE triple coincidence O6+ - summed over telescope and eoq

Differential flux, dJ/dE triple coincidence O6+ - summed over telescope and eoq (sorted sector)

[no plot] Error in the differential flux value triple coincidence O6+

[no plot] Full 3-D VDF in phase space density for triple coincidence C5+

Phase space density value triple coincidence C5+ - summed over telescope and sector

Phase space density value triple coincidence C5+ - summed over telescope and eoq

Phase space density value triple coincidence C5+ - summed over telescope and eoq (sorted sector)

[no plot] Error in velocity distribution function value triple coincidence C5+

Counts for triple coincidence C5+ - summed over telescope and sector

Counts for triple coincidence C5+ - summed over telescope and eoq

Counts for triple coincidence C5+ - summed over telescope & eoq (sorted sector)

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence C5+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence C5+

Differential flux, dJ/dE triple coincidence C5+ - summed over telescope and sector

Differential flux, dJ/dE triple coincidence C5+ - summed over telescope and eoq

Differential flux, dJ/dE triple coincidence C5+ - summed over telescope and eoq (sorted sector)

[no plot] Error in the differential flux value triple coincidence C5+

[no plot] Full 3-D VDF in phase space density for triple coincidence Fe10+

Phase space density value triple coincidence Fe10+ - summed over telescope and sector

Phase space density value triple coincidence Fe10+ - summed over telescope and eoq

Phase space density value triple coincidence Fe10+ - summed over telescope and eoq (sorted sector)

Phase space density value triple coincidence Fe10+ (Telescope 2)

[no plot] Error in velocity distribution function value triple coincidence Fe10+

Counts for triple coincidence Fe10+ - summed over telescope and sector

Counts for triple coincidence Fe10+ - summed over telescope and eoq

Counts for triple coincidence Fe10+ - summed over telescope & eoq (sorted sector)

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence Fe10+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence Fe10+

Differential flux, dJ/dE triple coincidence Fe10+ - summed over telescope and sector

Differential flux, dJ/dE triple coincidence Fe10+ - summed over telescope and eoq

Differential flux, dJ/dE triple coincidence Fe10+ - summed over telescope and eoq (sorted sector)

[no plot] Error in the differential flux value triple coincidence Fe10+

[no plot] Full 3-D VDF in phase space density for triple coincidence C+

[no plot] Error in velocity distribution function value triple coincidence C+

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence C+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence C+

[no plot] Error in the differential flux value triple coincidence C+

[no plot] Full 3-D VDF in phase space density for triple coincidence N+

[no plot] Error in velocity distribution function value triple coincidence N+

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence N+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence N+

[no plot] Error in the differential flux value triple coincidence N+

[no plot] Full 3-D VDF in phase space density for triple coincidence O2+

[no plot] Error in velocity distribution function value triple coincidence O2+

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence O2+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence O2+

[no plot] Error in the differential flux value triple coincidence O2+

[no plot] Full 3-D VDF in phase space density for triple coincidence O7+

[no plot] Error in velocity distribution function value triple coincidence O7+

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence O7+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence O7+

[no plot] Error in the differential flux value triple coincidence O7+

[no plot] Full 3-D VDF in phase space density for triple coincidence O8+

[no plot] Error in velocity distribution function value triple coincidence O8+

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence O8+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence O8+

[no plot] Error in the differential flux value triple coincidence O8+

[no plot] Full 3-D VDF in phase space density for triple coincidence C4+

[no plot] Error in velocity distribution function value triple coincidence C4+

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence C4+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence C4+

[no plot] Error in the differential flux value triple coincidence C4+

[no plot] Full 3-D VDF in phase space density for triple coincidence C6+

[no plot] Error in velocity distribution function value triple coincidence C6+

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence C6+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence C6+

[no plot] Error in the differential flux value triple coincidence C6+

[no plot] Full 3-D VDF in phase space density for triple coincidence Fe8+

[no plot] Error in velocity distribution function value triple coincidence Fe8+

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence Fe8+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence Fe8+

[no plot] Error in the differential flux value triple coincidence Fe8+

[no plot] Full 3-D VDF in phase space density for triple coincidence Fe9+

[no plot] Error in velocity distribution function value triple coincidence Fe9+

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence Fe9+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence Fe9+

[no plot] Error in the differential flux value triple coincidence Fe9+

[no plot] Full 3-D VDF in phase space density for triple coincidence Fe16+

Phase space density value triple coincidence Fe16+ (Telescope 2)

[no plot] Error in velocity distribution function value triple coincidence Fe16+

[no plot] Error in counts estimated assuming Poisson statistics triple coincidence Fe16+

[no plot] Full 3-D VDF differential flux, dJ/dE triple coincidence Fe16+

[no plot] Error in the differential flux value triple coincidence Fe16+

[no plot] Full 3-D VDF in phase space density for double coincidence H+

Phase space density value double coincidence H+ - summed over telescope and sector

Phase space density value double coincidence H+ - summed over telescope and eoq

Phase space density value double coincidence H+ - summed over telescope and eoq (sorted sector)

[no plot] Error in velocity distribution function value double coincidence H+

Counts for double coincidence H+ - summed over telescope and sector

Counts for double coincidence H+ - summed over telescope and eoq

Counts for double coincidence H+ - summed over telescope & eoq (sorted sector)

[no plot] Error in counts estimated assuming Poisson statistics double coincidence H+

[no plot] Full 3-D VDF differential flux, dJ/dE double coincidence H+

Differential flux, dJ/dE double coincidence H+ - summed over telescope and sector

Differential flux, dJ/dE double coincidence H+ - summed over telescope and eoq

Differential flux, dJ/dE double coincidence H+ - summed over telescope and eoq (sorted sector)

[no plot] Error in the differential flux value double coincidence H+

[no plot] Full 3-D VDF in phase space density for double coincidence He+

Phase space density value double coincidence He+ - summed over telescope and sector

Phase space density value double coincidence He+ - summed over telescope and eoq

Phase space density value double coincidence He+ - summed over telescope and eoq (sorted sector)

[no plot] Error in velocity distribution function value double coincidence He+

Counts for double coincidence He+ - summed over telescope and sector

Counts for double coincidence He+ - summed over telescope and eoq

Counts for double coincidence He+ - summed over telescope & eoq (sorted sector)

[no plot] Error in counts estimated assuming Poisson statistics double coincidence He+

[no plot] Full 3-D VDF differential flux, dJ/dE double coincidence He+

Differential flux, dJ/dE double coincidence He+ - summed over telescope and sector

Differential flux, dJ/dE double coincidence He+ - summed over telescope and eoq

Differential flux, dJ/dE double coincidence He+ - summed over telescope and eoq (sorted sector)

[no plot] Error in the differential flux value double coincidence He+

[no plot] Full 3-D VDF in phase space density for double coincidence He2+

Phase space density value double coincidence He2+ - summed over telescope and sector

Phase space density value double coincidence He2+ - summed over telescope and eoq

Phase space density value double coincidence He2+ - summed over telescope and eoq (sorted sector)

[no plot] Error in velocity distribution function value double coincidence He2+

Counts for double coincidence He2+ - summed over telescope and sector

Counts for double coincidence He2+ - summed over telescope and eoq

Counts for double coincidence He2+ - summed over telescope & eoq (sorted sector)

[no plot] Error in counts estimated assuming Poisson statistics double coincidence He2+

[no plot] Full 3-D VDF differential flux, dJ/dE double coincidence He2+

Differential flux, dJ/dE double coincidence He2+ - summed over telescope and sector

Differential flux, dJ/dE double coincidence He2+ - summed over telescope and eoq

Differential flux, dJ/dE double coincidence He2+ - summed over telescope and eoq (sorted sector)

[no plot] Error in the differential flux value double coincidence He2+

[no plot] Full 3-D VDF in phase space density for double coincidence O+

Phase space density value double coincidence O+ - summed over telescope and sector

Phase space density value double coincidence O+ - summed over telescope and eoq

Phase space density value double coincidence O+ - summed over telescope and eoq (sorted sector)

[no plot] Error in velocity distribution function value double coincidence O+

Counts for double coincidence O+ - summed over telescope and sector

Counts for double coincidence O+ - summed over telescope and eoq

Counts for double coincidence O+ - summed over telescope & eoq (sorted sector)

[no plot] Error in counts estimated assuming Poisson statistics double coincidence O+

[no plot] Full 3-D VDF differential flux, dJ/dE double coincidence O+

Differential flux, dJ/dE double coincidence O+ - summed over telescope and sector

Differential flux, dJ/dE double coincidence O+ - summed over telescope and eoq

Differential flux, dJ/dE double coincidence O+ - summed over telescope and eoq (sorted sector)

[no plot] Error in the differential flux value double coincidence O+

[no plot] Full 3-D VDF in phase space density for double coincidence O6+

Phase space density value double coincidence O6+ - summed over telescope and sector

Phase space density value double coincidence O6+ - summed over telescope and eoq

Phase space density value double coincidence O6+ - summed over telescope and eoq (sorted sector)

[no plot] Error in velocity distribution function value double coincidence O6+

Counts for double coincidence O6+ - summed over telescope and sector

Counts for double coincidence O6+ - summed over telescope and eoq

Counts for double coincidence O6+ - summed over telescope & eoq (sorted sector)

[no plot] Error in counts estimated assuming Poisson statistics double coincidence O6+

[no plot] Full 3-D VDF differential flux, dJ/dE double coincidence O6+

Differential flux, dJ/dE double coincidence O6+ - summed over telescope and sector

Differential flux, dJ/dE double coincidence O6+ - summed over telescope and eoq

Differential flux, dJ/dE double coincidence O6+ - summed over telescope and eoq (sorted sector)

[no plot] Error in the differential flux value double coincidence O6+

[no plot] Full 3-D VDF in phase space density for double coincidence C+

[no plot] Error in velocity distribution function value double coincidence C+

[no plot] Error in counts estimated assuming Poisson statistics double coincidence C+

[no plot] Full 3-D VDF differential flux, dJ/dE double coincidence C+

[no plot] Error in the differential flux value double coincidence C+