AMPTE-CCE

The instrument was a triaxial fluxgate magnetometer mounted on a 2.4 m (7 ft 10 in) boom. It had seven automatically switchable ranges (from ± 16 nT to ± 65,536 nT) with resolution commensurate with a 13-bit analog-to-digital converter, and was read out at 8.6 vector samples/second. The signals from two sensors (one parallel to the spin axis and one orthogonal) were also fed into 5-50 Hz bandpass channels that were read out every 5 seconds.[5][6]

The instrument consisted of an entrance collimator and electrostatic analyzer section followed by a time-of-flight and total-energy-measurement section floating at a 30 kV acceleration potential. The energy range covered was from 1 to 300 keV/Q, with a geometric factor of 2.E-3 cm²-sr and 32-sector angular resolution. Energy resolution was 5 to 18%, and all charge states and isotopes of Hydrogen (H) and Helium (He), the charge states of Lithium (Li), and the major elements and charge states up to and including Iron (Fe) were resolved.[7][8]

This instrument consisted of an entrance collimator and retarding potential analyzer, a curved-plate electrostatic energy analyzer, and a combined electrostatic-magnetic mass analyzer in series. The energy range covered was approximately 0 to 17 keV/Q, with a geometric factor ranging from 0.01 to 0.05 cm²-sr, an energy resolution from 6 to 60%, and an M/Q resolution of 10%. This instrument cleanly separated Li+ and Ba+ tracer ions from the background. It was nearly identical to one flown on Dynamics Explorer 1 by the same group of investigators. An additional set of eight spectrometers containing permanent bending magnets and channeltrons measured electrons in eight channels from 50 eV to 25 keV.[9][10]

The instrument consisted of a collimator and an electron sweeping magnet followed by a 10 cm (3.9 in) time of flight (TOF) telescope with thin foils at the front and midpoint and a solid-state detector at the rear. Incident ion TOF was measured from the front foil to the back detector and from the center foil to the back detector, and energy was measured in the back detector. The dual TOF measurement and very fast energy channel processing gave high immunity to accidental events, and allowed the instrument to measure the composition and spectra of both common species and tracer ions over a species-dependent energy range of >10 keV/nucleon to 6 MeV/nucleon, with a geometric factor of 1.E-2 cm²-sr and 32-sector angular resolution.[11][12]

The instrument consisted of a balanced electric dipole with an effective length of 70 cm (28 in) and six bandpass channels covering the range from 5 Hz to 178 kHz. The highest five channels were sampled every 0.6 seconds and the lowest (5–50 Hz) channel was sampled every 20 seconds. The instrument was the flight spare of the Pioneer Venus Electric Field Detector, with two additional filters added.[13][14]