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PAO 1 Telecon
THEMIS
Public Affairs
FGM Instrument
PAO 2 Telecon
Sensor Design (1)
Two crossed ringcoresMaterial: 6-81-Mo Permalloy band
non-ferromagn. NiMo30 alloy
Vector-compensated Ringcore sensor
Feedback Coil SystemMaterial: Cu - wire, see pickup
Coil const.: 13-17000nT/mA
CTE: about 24ppm (Cu and Al)
Fixation: by glue (Endfest 300)
Pickup Coil systemsMaterial: Cu wire isolated by polyesterimid and covered by bond coat (polyamid)
Sensitivity: about 1,5 … 3µV/nT
PAO 3 Telecon
Sensor Design (2)
Sensor Hut Interface Material Hut & base plate: Aluminium Isolation: glassfibre reinforced plastics Screws: titanium
Washers: glassfibre reinforced plasticsSurface (Al): Alodine 1200Mass: 78g
Mechanical Interfacemounting: four M4 screwsorientation: defined by ground plane and two feed side planes (V)
Electrical Interface10cm pigtail with HD-26P connector
PAO 4 Telecon
PAO 5 Telecon
Overview
Components of Mag BoomsElbow Latch
FGM Base Hinge/Frangibolt
SCM Frangibolt
SCM Base Hinge (similarto FGM Base Hinge)
Carbon-fiber tubes
1.25 in. ID carbon-fiber tubes.Al/Ti hinges and brackets.FGM Mag Boom is 1 m longSCM Mag Boom is 2 m long
PAO 6 Telecon
Harness Layout
FGM to IDPU:Harness goes through the hole in the base bracket and top deck.
Extra loops around elbow hinge that folds out 180°.
Harness connects directly to FGM.
Location for connector (not shown) from SCM to harness.
SCM to pre-amp:
Harness goes through the hole in the base bracket and top deck.
PAO 7 Telecon