1. Solar Probe Plus FIELDS Instrument PSR - MEP Introduction
Stuart D. Bale
FIELDS Principal Investigator
University of California, Berkeley

2. 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

3. FIELDS at the Mission Level…

4. 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

5. FIELDS Plasma Environment
- High cadence sampling
Burst memory system
Floating voltage preamps
Large dynamic range

6. 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

7. 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

8. 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
Magnetic Field
140dB
100k vectors/s
DC - 50kHz
MAG, SCM, DFB, DCB, TDS
Electric Field
2M vectors/s
DC - 1MHz
V1-V4, V5, AEB, DFB, TDS, DCB
Plasma Waves
1 spectrum/s
~5Hz - 1MHz
V1-V4, V5, AEB, DFB, TDS, DCB, SCM, MAG, RFS
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

9. The FIELDS Instrument Team