Solar Probe Plus FIELDS Instrument PSR - MEP Introduction Stuart D. Bale FIELDS Principal Investigator University of California, Berkeley bale@berkeley.edu
Overview and Requirements Outline Overview and Requirements SPP/FIELDS Science Requirements Instrument Concept and Block Diagram Block Diagram L1 Requirements and subsystems The FIELDS Team
FIELDS at the Mission Level…
FIELDS Top Level Description The SPP/FIELDS experiment will measure directly: DC/Low Frequency Electric Fields DC/Low Frequency Magnetic Fields Plasma wave (E and B) waveforms, spectra, and cross-spectra Spacecraft floating potential Solar and interplanetary radio (e/m) emissions …and by analysis: Perpendicular electron velocity and its spectrum Very accurate electron density and temperature Rapid (~kHz) density fluctuations and spectrum Voltage signatures of interplanetary dust
FIELDS Plasma Environment - High cadence sampling Burst memory system Floating voltage preamps Large dynamic range
The FIELDS Sensors - Five voltage sensors - Two Fluxgate magnetometers - One search-coil magnetometer - Main Electronics Package V1-V4 electric antennas MAGi, MAGo SCM V1-V4 electric antennas V5 electric antenna
Block Diagram FIELDS System Two Sides Each has Spacecraft I/F Each has Magnetometer Each has Antenna Elect. Each has Power Supply FIELDS1 also has Radio Freq Spect. Digital Fields Board SCM Calib Control Absolute Time Sequencer TDS I/F FIELDS2 also has Time Domain Sampler DCB I/F SWEAP I/F
FIELDS Level-1 Requirements Level-1 Requirements Flow to FIELDS subsystems Table 4.1 Baseline Fields and Waves Measurements Req. Measurement Dynamic Range Cadence Bandwidth Subsystem 4.1.1.1 Magnetic Field 140dB 100k vectors/s DC - 50kHz MAG, SCM, DFB, DCB, TDS 4.1.1.2 Electric Field 2M vectors/s DC - 1MHz V1-V4, V5, AEB, DFB, TDS, DCB 4.1.1.3 Plasma Waves 1 spectrum/s ~5Hz - 1MHz V1-V4, V5, AEB, DFB, TDS, DCB, SCM, MAG, RFS 4.1.1.4 QTN/Radio 100dB for QTN 80dB for radio 1 spectrum/4s QTN 1 spectrum/16s radio 10-2,500kHz QTN 1-16MHz radio V1-V4, SCM, RFS, DCB
The FIELDS Instrument Team