Abstract:Maintaining the geodesic motion of the test mass is vital to ASTROD I space mission. However, the electrostatic charging of the test mass due to cosmic rays and solar energetic particles will result in Coulomb and Lorentz forces and consequently influence the test mass motions. To estimate the size of these effects, a credible simulation of test mass charging processes is critically required. Using the GEANT4 software toolkit, we have modeled the charging processes and predict how the ASTROD I test mass will c… Show more
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