Table 2.
Expected typical values for plasma parameters and other derived quantities to be measured by FIELDS at different heliocentric distances. δBA and δEA are expectations for large Alfvénic fluctuations. δEL is the expected level of wave electric field fluctuations given a scaling that assumes constant energy density
| Parameters | 10 Rs | 55 Rs | 1 AU | |
|---|---|---|---|---|
| Magnetic Field | |B0|~ δ BA | 2000 nT | 70 nT | 6 nT |
| Electric Field | |Ec| ≤ vsw δ BA | 100 mV/m | 30 mV/m | 3 mV/m |
| Density | ne ~ δn | 7000 cm−3 | 120 cm−3 | 7 cm−3 |
| Electron Temperature | Te | 85 eV | 25 eV | 8 eV |
| Solar Wind Speed | vsw | 210 km/s | 400 km/s | 450 km/s |
| Alfvén Speed | vA | 500 km/s | 125 km/s | 45 km/s |
| Plasma Frequency | fpe | 750 kHz | 100 kHz | 24 kHz |
| Electron Gyrofrequency | fce | 60 kHz | 2 kHz | 160 Hz |
| Proton Gyrofrequency | fcp | 32 Hz | 1 Hz | 0.1 Hz |
| Convected Debye Length | vsw/λD | 4 μs | 8 μs | 22 μs |
| Convected Electron Inertial Length | vsw/(c/ωpe) | 0.3 ms | 1.2 ms | 5.5 ms |
| Convected Proton Inertial Length | vsw/(c/ωpi) | 13 ms | 50 ms | 250 ms |
| Convected Proton Gyroscale | vsw/ρp | 3 ms | 30 ms | 200 ms |
| DC/LF Electric Fluctuations | δEA ~ vA δBA | 1 V/m | 10 mV/m | 1 mV/m |
| Kinetic Electric Fluctuations | δEL | 1 V/m | 70 mV/m | 10 mV/m |