Constraining the charge-sign and rigidity-dependence of solar modulation

Abstract Our ability to identify the sources of cosmic rays and understand how these particles propagate through interstellar medium is hindered by combined effects solar wind its embedded magnetic field, collectively known as modulation. In this paper, we build upon our previous work model constrain modulation on cosmic-ray spectrum, using data from A MS-02 BESS Polar II collected between 2007 2012, during which heliospheric field was in a state negative polarity. uses measurements tilt angle current sheet accurately predict function time, charge, rigidity. By incorporating period polarity, have been able robustly observe charge-dependent