Commissioning Results

Lander Experiment ROMAPLander Experiment ROMAP

Experiment Overview ROMAP Magnetometer Electrostatic Analyser Pressure Sensors

Commissioning Results Functionality, Anomalies Spacecraft / Lander Disturbances Common Measurement Sept. 08/09

RPC Mag - ROMAP Why & when common measurements

Commissioning Results

MagnetometerMagnetometer

ROMAP & RPC fluxgate sensors: Both are vector compensated ringcore sensors RPC: Coils on ceramics, feedback and sense using

the same coil system ROMAP: Cu wire covered by bond coat, feedback

separated from sense coils ROMAP sensor two times larger in diameter

ROMAP Mag electronics: Digital fluxgate electronics (sensor ac signal

digitised by 40kHz, pre-processing in FPGA)

ROMAP Mag parameters: Range 2000nT Resolution 0.005nT

Commissioning Results

Plasma MonitorPlasma Monitor

Electrostatic Analyser energy range

ions 40...8000eVelectrons 0.3...4200eV

energy steps 32 / 64 exp. time 40ms...1s

Faraday Cup integral energy distribution

up to 2000eV energy steps 64 range 5x10-12 – 4x10-10 A

Commissioning Results

Sensor AccommodationSensor Accommodation

1kg inclusive boom 0.8…1.0Watt depending on mode

Commissioning Results

SI: Fluxgate Magnetometer (FGM)SI: Fluxgate Magnetometer (FGM)

THEMIS/SITE VISIT SI-15 UCB, 01/28/2003

Karl Heinz Glassmeier, TU-BSin co-operation with IWF-Graz

PI of the ROSETTA Magnetometer Co-I of the GIOTTO Mission and on

the magnetometer teams for CLUSTER, FREJA and CASSINI missions

Research interest and experience in data analysis and theory of space plasma physics and solar system physics in general

About 150 publications in space science

Equator-S,Double Star,DS1,Rosetta OrbiterRosetta Lander, Venus Express

Commissioning Results

Fluxgate Sensor Ringcore Technology

Developed since 1983 by several German institutes and companies

Noise < 10pT/Sqrt(Hz) Offset stability < 2nT/year

Vector compensating Helmholtz System No transverse field dependency Orientation of magnetic axis depends

on feedback coil system only No support material like ceramics: low

weight & temp. dependence of scale value depends on one material

THEMIS/SITE VISIT SI-16 UCB, 01/28/2003

SI: Fluxgate Magnetometer (FGM)SI: Fluxgate Magnetometer (FGM)

Mass < 50gr

Volume 5x5x4cm3

Commissioning Results

Digital Fluxgate Electronics Heritage / Reliability

Developed in Germany since 1991 Tested worldwide in observatories (high

precision) and applied physics (robustness) First space application onboard the MIR,

actually prepared for ESA’s Rosetta and Venus Express missions

Advantages Digitization close to sensor very

limited number of analogue components Very large dynamic range 10pT

resolution also close to Earth no range switching anymore

THEMIS/SITE VISIT SI-17 UCB, 01/28/2003

SI: Fluxgate Magnetometer (FGM)SI: Fluxgate Magnetometer (FGM)

DAC

IDPU

Sensor

ADC

FPGA

feedback

sense excitation

Commissioning Results

Test & Calibration Preflight

All magnetometers will be tested under various environmental conditions (B,)

Large number of facilities exist in Europe (Magnetsrode, Niemegk, Graz…)

Additionally a test facility (similar to that in Graz) will be installed in Berkeley

Inflight preprocessing and calibration software for

Cluster and Equator-S was developed in Braunschweig and Graz

Personal (E.Georgescu, K.H.Fornacon) is available after Cluster

THEMIS/SITE VISIT SI-18 UCB, 01/28/2003

SI: Fluxgate Magnetometer (FGM)SI: Fluxgate Magnetometer (FGM)

Cluster, Equator-SRosetta O. & L. Oerstedt, ChampCassini, GiottoAmpte, HeliosFreja, DS1 ...