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- b3b8b168-e509-44f2-9610-326c72bec833 ProvidedBy 4ea1b3cc-d4d2-4803-a416-753cdd1ec451 @default.
- b3b8b168-e509-44f2-9610-326c72bec833 type Instrument @default.
- b3b8b168-e509-44f2-9610-326c72bec833 type Provider @default.
- b3b8b168-e509-44f2-9610-326c72bec833 broader b2140059-b3ca-415c-b0a7-3e142783ffe8 @default.
- b3b8b168-e509-44f2-9610-326c72bec833 broader def72d78-3c2f-4f46-91e7-259a0e63e2de @default.
- b3b8b168-e509-44f2-9610-326c72bec833 broader ff564c87-78f2-47eb-a857-a4bdc0a71ae5 @default.
- b3b8b168-e509-44f2-9610-326c72bec833 definition "The Cylindrical Electrostatic Probe CEP consisted of twoidentical instruments designed to measure electron temperatureselectron and ion concentrations ion mass and spacecraftpotential One probe was oriented along the spin axis of thespacecraft usually perpendicular to the orbit plane and theother radially so that it could observe in the direction of thevelocity vector once each 15s spin period Each instrument wasa retardingpotential Langmuirprobe device that produced acurrentvoltage IV curve for a known voltage pattern placedon the collector Electrometers were used to measure thecurrent There were two systems of operation one with two modesand another with three modes using collector voltage patternsbetween plus and minus 5 volts Most modes involved anautomatic or fixed adjustment of collector voltage limitsandor electrometer output such that the region of interest onthe IV profile provided high resolution Each system wasdesigned for use with only one of the probes but they could beinterswitched to provide backup redundancy The bestmeasurements in the most favorable modes provided 1s timeresolution electron temperature between 300 and 1E4 deg K 10accuracy ion density between 1E4 and 1E7 ionscc 1020accuracy electron density between 50 and 1E6 electronsccand ion mass at ion densities above 1E4 Each probe had acollector electrode extending from the central axis of acylindrical guard ring The 25cmlong guard ring was at theend of a 25cm boom and the collector extended another 75 cmbeyond the guard ring The boom guard and collector was 02 cmin diameterSource NASA" @default.
- b3b8b168-e509-44f2-9610-326c72bec833 prefLabel "CEP" @default.