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Matthi
, D.*; Ehresmann, B.*; Lohf, H.*; K
hler, J.*; Zeitlin, C.*; Appel, J.*; Sato, Tatsuhiko; Slaba, T. C.*; Martin, C.*; Berger, T.*; et al.
Journal of Space Weather and Space Climate (Internet), 6, p.A13_1 - A13_17, 2016/03
Times Cited Count：65 Percentile：93.52(Astronomy & Astrophysics)The Radiation Assessment Detector (RAD) on the Mars Science Laboratory (MSL) has been measuring the radiation environment on the surface of Mars since August 6th 2012. In this work, several models such as GEANT4, PHITS, and HZETRN/OLTARIS are used to predict the radiation environment caused by galactic cosmic rays on Mars in order to compare and validate them with the experimental results. Although good agreement is found in many cases for GEANT4, PHITS and HZETRN/OLTARIS, some models still show large, sometimes order of magnitude, discrepancies in certain particle spectra. We have found that RAD data is helping make better choices of input parameters and physical models. These results help to predict dose rates for future manned missions as well as to perform shield optimization studies.
Puchalska, M.*; Sihver, L.*; Sato, Tatsuhiko; Berger, T.*; Reitz, G.*
Advances in Space Research, 50(4), p.489 - 495, 2012/08
Times Cited Count：12 Percentile：63.83(Engineering, Aerospace)We will present simulations using the three-dimensional Monte Carlo Particle and Heavy Ion Transport code System (PHITS) of long term dose measurements performed with the ESA supported experiment MATROSHKA (MTR), which is an anthropomorphic phantom containing over 6000 radiation detectors, mimicking a human head and torso. The results confirm previous calculations and measurements which indicate that PHITS is a suitable tool for estimations of dose received from cosmic radiation and when performing shielding design studies of spacecraft.
Gustafsson, K.*; Sihver, L.*; Mancusi, D.*; Sato, Tatsuhiko; Reitz, G.*; Berger, T.*
Advances in Space Research, 46(10), p.1266 - 1272, 2010/11
Times Cited Count：11 Percentile：58.31(Engineering, Aerospace)A method for benchmarking and developing the code is to simulate experiments performed in space or on Earth. We have carried out the PHITS simulations of the Matroshka experiment which focus on determining the radiation load on astronauts inside and outside the International Space Station by using a torso of a tissue equivalent human phantom, filled with active and passive detectors located in the positions of critical tissues and organs. We will present status and results of our simulations.
Sihver, L.*; Sato, Tatsuhiko; Puchalska, M.*; Reitz, G.*
Radiation and Environmental Biophysics, 49(3), p.351 - 357, 2010/08
Times Cited Count：22 Percentile：58.5(Biology)In this paper we will present simulations using the three-dimensional Monte Carlo Particle and Heavy Ion Transport code System (PHITS) of long term dose measurements performed with the European Space Agency (ESA) supported experiment MATROSHKA (MTR), which is an anthropomorphic phantom containing over 6000 radiation detectors, mimicking a human head and torso.
Sihver, L.*; Sato, Tatsuhiko; Puchalska, L.*; Reitz, G.*
no journal, ,
Concerns about the biological effects of space radiation are increasing rapidly due to the perspective of long-duration manned missions, both in relation to the International Space Station (ISS) and to manned interplanetary missions to Moon and Mars in the future. In this paper we will present simulations using the three-dimensional Monte Carlo Particle and Heavy Ion Transport code System (PHITS) of long term dose measurements performed with the ESA supported experiment MATROSHKA (MTR), which is an anthropomorphic phantom containing over 6000 radiation detectors, mimicking a human head and torso.
Sato, Tatsuhiko; Nagamatsu, Aiko*; Takeda, Kazuo*; Niita, Koji*; Puchalska, M.*; Sihver, L.*; Reitz, G.*
no journal, ,
Estimation of organ doses and their mean quality factors for astronauts due to cosmic-ray exposure has been an essential issue in the planning of long-term space missions. We therefore performed simulation for calculating the organ doses and their mean quality factors inside the MATROSHKA phantom, using a realistic geometry of the Kibo module in combination with the NUNDO phantom, which was constructed based on the CT image of the phantom. The particle and heavy ion transport code system PHITS was employed in the simulation. From preliminary results, it is found that the calculated organ doses and their mean quality factors inside the MATROSHKA phantom agree with the corresponding experimental data fairly well.
