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