4 November 1999 WRMISS Workshop 1

ESA’s Space Radiationand Plasma Monitoring Programmes

P. Nieminen, E. Daly, A. Mohammadzadeh, A. HilgersESA/ESTEC, The Netherlands

P. Bühler, W. HajdasPSI, Switzerland

ESA Space Environment &Effects Analysis Section

4 November 1999 WRMISS Workshop 2

Space Radiation and Plasma Monitoring:Rationale

ESA Space Environment &Effects Analysis Section

● Effects of the space radiation and plasmaenvironment are varied and complex:instrument “background”, component &material degradation, SEP, spacecraftanomalies, ...

● New technologies → new problem areas

● Modelling: Need for continuous measurementswith adequate spatial, energy and particlespecies coverage

4 November 1999 WRMISS Workshop 3

Radiation Environment Monitor (REM)

STRV-1b

Two units:

● STRV-1b microsatellite(1994 - 98)

● MIR space station(1994 - 96)

ESA Space Environment &Effects Analysis Section

Wealth of data onelectron belt dynamism,E-W proton anisotropy,...

4 November 1999 WRMISS Workshop 4

Standard RadiationEnvironment Monitor (SREM)

Optimised Al-Ta “Sandwich structure”.

Aluminum

TantalumSilicon (detectors)

D1 D2

Improved:

- Performance- Cost- Mass (2.5 kg)- Volume (2 l)

e-

p+

e-

Simulation outcome: modularity (D3).Further electronics miniaturisation underway.

- Electrons > 0.5 MeV- Protons > 10 MeV- Heavy ions qualitatively

ESA Space Environment &Effects Analysis Section

4 November 1999 WRMISS Workshop 5

ESA Space Environment &Effects Analysis Section

L o g ic d E d isc r . le v e l

[M e V ] P a r tic le E m in

[M e V ] E m a x [M e V ]

1 . D 1 0 .0 8 5 P ro to n E le c tro n

2 0 1 .0 In f .

2 . D 1 0 .2 5 P ro to n 2 0 5 5 0

3 . D 1 0 .6 P ro to n 2 0 1 2 0

4 . D 1 2 P ro to n 2 0 2 7

5 . D 1 3 0 P ro to n 2 0 3 4

6 . D 2 0 .0 8 5 P ro to n 3 9 In f .

7 . D 2 9 Io n s D e p e n d in go n Z

D e p e n d in go n Z

8 . D 1 * D 2 0 .6 , 2 P ro to n

c o in c id e n c e 4 0 5 0

9 . D 1 * D 2 0 .6 , 1 .1 -2 .0 P ro to n

c o in c id e n c e 5 0 7 0

1 0 . D 1 * D 2 0 .6 , 0 .6 -1 .1 P ro to n

c o in c id e n c e 7 0 1 2 0

1 1 . D 1 * D 2 0 .0 8 5 -0 .6 , 0 .0 8 5 -

0 .6 P ro to n

c o in c id e n c e 1 3 0 In f .

1 2 . D 3 0 .0 8 5 E le c tro nP ro to n 0 .5 1 0 In f .

1 3 . D 3 0 .2 5 E le c tro n 0 .5 5 2 .3

1 4 . D 3 0 .7 5 P ro to n 1 1 9 0

1 5 . D 3 2 P ro to n 1 1 3 0

SREMenergy binning

D1-D2 protoncoincidence

4 November 1999 WRMISS Workshop 6

SREM

First mission: STRV-1c

ESA Space Environment &Effects Analysis Section

Pictures courtesy of DERA Farnborough

4 November 1999 WRMISS Workshop 7

FIRST

INTEGRAL

PROBA

CREEP onboard the ISS

Mars Express

Missions with SREM...

…contd...

ESA Space Environment &Effects Analysis Section

4 November 1999 WRMISS Workshop 8

Mercury Orbiter

Missions with SREM...

ESA Space Environment &Effects Analysis Section

Rosetta

4 November 1999 WRMISS Workshop 9

Columbus Radiation Environmentand Effects Package (CREEP) in TEF

CR

EA

X

Dose-D

epth Monitor

Proton Monitor

SRE

M

ESA Space Environment &Effects Analysis Section

SPICA

4 November 1999 WRMISS Workshop 10

ESA Space Environment &Effects Analysis Section

Columbus Radiation Environmentand Effects Package (CREEP)

• Unobstructed view to RAM,zenith and a directionperpendicular to these

• Component Technology Test-Bed (CTTB) for memorydevices, opto-couplers,comparators,...

• Launch late 2002, missionduration ~3 years.

• Simulations;

RAM

Zenith

4 November 1999 WRMISS Workshop 11

• High-fidelity “science” instrument

• Good spatial, temporal and energy resolution

• In-orbit co-ordination facility for SREMs and potentiallyother monitoring devices

• Phase-A Study by Aboa Space Research, Inc. (ERNEinstrument onboard SOHO; AMS collaborators) due tostart by end of -99.

• to be used for simulations.

Under Study...

ESA Space Environment &Effects Analysis Section

Charged Particle Telescope (CPT)

4 November 1999 WRMISS Workshop 12

• Low weight, low power plasma monitor

• Electrons, ions < 100 keV (spacecraft anomalies due tocharging; instrumental background in X-ray detectors).

• This low-energy energy range is not covered by currentmonitor-type devices

• Space weather effects predictions, spacecraft anomalyanalysis, plasma science instruments calibration

Under Study...

ESA Space Environment &Effects Analysis Section

Plasma Environment Monitor (PEM)

4 November 1999 WRMISS Workshop 13

• ESA General Studies Programme activity

• A degree of e-/p+ and energy resolution required

• Applications in medical, physics, environmental fields

• Contractor chosen; prototyping activity will be started soon

Under Study...

ESA Space Environment &Effects Analysis Section

Miniature Radiation Monitor (MRM)

1-5 kg1-5 W

100-500 kEURO

<100 g<0.1 W

< 30 kEURO

4 November 1999 WRMISS Workshop 14

• ESA has a wide range of on-going radiation and plasmamonitoring activities

• Needs of the ISS, science missions, commercial satellites,technology demonstration payloads addressed

• Connection to data and modelling efforts important

• Potential applications in other fields

• Comments, requirements, feedback from space radiationcommunity welcome

• Collaboration, data sharing

ESA Space Environment &Effects Analysis Section

Conclusions