1Geant4 Workshop20 September 1999

in Space :Examples of Past and Future Missions and Experiments

P. Nieminen, ESA/ESTEC, The Netherlands

20 September 1999 Geant4 Workshop 2

ESA Space Environment & Effects Analysis Section

in Space:Examples of Past and Future Missions and

Experiments

P. Nieminen, ESA/ESTEC, The Netherlands Standard Radiation Environment Monitor (SREM) Laser Interferometer Space Antenna (LISA) Infrared Space Observatory (ISO) X-ray surveys of asteroids and moons Columbus Radiation Environment and Effects Package (CREEP) Cellular & DNA damage: Astronaut safety

20 September 1999 Geant4 Workshop 3

Standard Radiation Environment Monitor (SREM)

ESA Space Environment & Effects Analysis Section

Optimised Al-Ta “Sandwich structure”.

AluminumTantalumSilicon (detectors)

D1 D2

Trade-off:

- Performance- Cost- Mass- Volume

e-

(p+)

e-

Simulation outcome: modularity (D3) - Electrons > 0.5 MeV- Protons > 10 MeV- Heavy ions qualitativelyGeant4: CAD-tool interface

20 September 1999 Geant4 Workshop 4

ESA Space Environment & Effects Analysis Section

FIRST

INTEGRAL

PROBA

CREEP onboard the ISS

Mars Express

Missions with SREM...

…more to come.

20 September 1999 Geant4 Workshop 5

ESA Space Environment & Effects Analysis Section

Laser Interferometer Space Antenna (LISA)

Detection and observation of gravitational waves from massive black holes and galactic binary stars

Small motions of free-floating test masses

- Interferometer arm length ~5,000,000 km- Distance between two satellites at the same vertex 200-300 km

20 September 1999 Geant4 Workshop 6

ESA Space Environment & Effects Analysis Section

Laser Interferometer Space Antenna (LISA)4 cm Gold-Platinum cubic test body : Charging by cosmic rays and solar particles and their secondaries

Analysis of charging by Geant3.21 down to 10 keV; interfacing with ITS3.0 down to 1 keV. [Y. Jafry et al., Class. Quantum Grav. 13, 1996]

Geant4: Analysis possible down to 250 eV

p+,

-rays

20 September 1999 Geant4 Workshop 7

ESA Space Environment & Effects Analysis Section

Infrared Space Observatory (ISO)

ISOCAM detector images during quiet period (above)and during the solar event of 3-9.11. 1997 (below)

Courtesy M. Sauvage. ISOCAM PI is C. Cesarsky, CEA-Saclay

M51

20 September 1999 Geant4 Workshop 8

ESA Space Environment & Effects Analysis Section

Infrared Space Observatory (ISO)

Ray-tracing Monte Carlo simulations; comparison to glitch data

Part of the glitches due to ~4 MeV -particles produced by 232Th in the lens system

Geant4: New powerful modules Sector Shielding Analysis Tool (SSAT) and Radioactive Decay Module (RDM)

Glitch data

Ray-tracing simulation

20 September 1999 Geant4 Workshop 9

ESA Space Environment & Effects Analysis Section

X-Ray Surveys of Asteroids and Moons

Induced X-ray line emission:indicator of target composition(~100 m surface layer)

Cosmic rays,jovian electrons

Geant3.21

ITS3.0, EGS4

Geant4

C, N, O line emissions included

Solar X-rays, e, p

Courtesy SOHO EIT

20 September 1999 Geant4 Workshop 10

ESA Space Environment & Effects Analysis Section

Columbus Radiation Environment and Effects Package (CREEP) in TEF

CR

EAX

Dose-D

epth Monitor

Proton Monitor

SREM

20 September 1999 Geant4 Workshop 11

ESA Space Environment & Effects Analysis Section

Interactions of radiation with biological systems at cellular level

New Geant4-based activity in the ESA General Studies Programme

Heavy ions particularly harmful

Astronaut safety, exobiology

C, Fe, ...

12Geant4 Workshop20 September 1999

ESA Space Environment & Effects Analysis Section

Conclusions

Presentation by P.R. Truscott

is a new, powerful tool for a wide range of space radiation applications Candidates for use: Integral, FIRST/PLANCK, STEP, XEUS, CPT, AMS,... ESA-sponsored work on several space-specific modules completed or underway