ASTROD I Charging Simulation and Disturbances
ASTROD I Charging Simulation and Disturbances
复制标题
ASTROD I 充电模拟和干扰
DOI:
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发表时间:
2007-04
期刊:
影响因子:
--
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中科院分区:
文献类型:
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ASTROD I is planned as a single spacecraft mission. It will use interferometric and pulse ranging techniques between the spacecraft and ground stations, to make high precision measurements of the parameters that describe the solar system, and to test relativistic gravity with improved accuracy. At the heart of the spacecraft is a test mass, which the spacecraft will follow using a drag-free control system. The mission critically depends on maintaining the geodesic motion of the test mass. Charging of the test mass due to cosmic rays and solar particles will disturb its geodesic motion. We have modelled the charging process using the GEANT4 toolkit and a simplified, geometrical model and estimate that the ASTROD I test mass will charge positively, at a rate of 24 +/-7 e+/s, due to cosmic ray protons and alpha particles (3He and 4He) at solar minimum. We have used the results of this simulation to estimate the magnitude of disturbances associated with test mass charging, for the worst-case scenario, taking into account uncertainties in the model and potential charging contributions from minor cosmic-ray components.
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影响因子:
3.5
作者:
Shaul, DNA;Araújo, HM;Wass, PJ
通讯作者:
Wass, PJ
影响因子:
3.5
作者:
W. Ni;S. Shiomi;An-Chi Liao
通讯作者:
W. Ni;S. Shiomi;An-Chi Liao
影响因子:
5.2
作者:
Heber, B;Droge, W;Paizis, C
通讯作者:
Paizis, C
影响因子:
3.5
作者:
D. Shaul;T. Sumner;H. Araújo;G. Rochester;P. Wass;C. Lee
通讯作者:
D. Shaul;T. Sumner;H. Araújo;G. Rochester;P. Wass;C. Lee
影响因子:
3.5
作者:
Grimani, C;Vocca, H;Travasso, F
通讯作者:
Travasso, F