Verifikation des numerischen Matroshka-Modells und MC-Simulationen in der Strahlungsumgebung der ISS

01.09.2009 - 31.01.2011
Auftragsforschungsprojekt
The main aim of the MATSIM project (phase A and B) is the full mathematical simulation of the Matroshka phantom using Monte Carlo transport codes. The project will be carried out within the framework of the already existing and acknowledged ESA ELIPS project Matroshka, an international collaboration of more than 18 research institutes from all over the world under the coordination of the German Aerospace Center (DLR). Matroshka is a facility designed to determine the radiation exposure of an astronaut during an extravehicular activity (EVA) at the International Space Station (ISS). For this purpose, during the experiment several thousand thermoluminescence dosimeters (TLD) were used to measure the dose distribution within an anthropomorphic phantom exposed outside the ISS. Within MATSIM-A, a numerical model of the Matroshka phantom was developed using the same geometry, material, and density distribution of the real phantom. Simulations of the imparted energy and absorbed dose distribution inside the phantom body were performed for photon and neutron radiation fields which will be used for the validation of the numerical model. In MATSIM-B, the simulated dose distribution inside the phantom will be compared with the response of TLDs when exposed to the same photon and neutron reference radiation fields available from Austrian reference laboratories. Further irradiations in ion reference fields will be planed. The validation of the numerical model against TLD reference measurements will form the basis to study the dose distribution within the phantom in the radiation environment expected at the ISS orbit. Furthermore, the response of a tissue equivalent proportional counter (TEPC) to the ISS radiation conditions will be simulated. The resulting microdosimetric distribution will provide additional information about the radiation quality. The gathered information is needed for comprehensive risk assessment of radiation hazards to humans in space due to the ionising and high energy particle radiation and will be used further for the already planned project phase 3 of Matroshka.

Personen

Projektleiter_in

Projektmitarbeiter_innen

Institut

Auftrag/Kooperation

  • FFG - Österr. Forschungsförderungsgesellschaft mbH

Forschungsschwerpunkte

  • Computational Science and Engineering
  • Energy and Environment
  • Materials and Matter

Schlagwörter

DeutschEnglisch
Kosmische StrahlungCosmic radiation
StrahlungstransportRadiation Transport
StrahlenrisikoRadiation Risk
MatroshkaMatroshka

Externe Partner_innen

  • AIT Austrian Institute of Technology GmbH