- Conference date: 17–22 June 2012
- Location: Big Island, Hawaii
Solar Orbiter is scheduled to launch in January 2017, and will carry as part of its payload the Heavy Ion Sensor (HIS), one of the components of the Solar Wind Analyzer (SWA) instrument suite. Heavy ions of particular interest are Ne, Mg, Si, and S which have been difficult to measure in the past due to their similar mass per charge ratios in the solar wind. We have characterized the response of HIS to these species using a Monte Carlo simulation of the instrument. These simulations use a realistic count rate and account for lost energy and angular scattering of ions passing through a carbon foil, time-of-flight of the secondary electrons, and the pulse height defect within the solid-state detectors. Our results show that HIS is capable of resolving the masses and charge-states of solar wind ions, such as He, C, O, Ne, Mg, and Fe. Results also show that there is some overlap between S and Si, but it is likely that we will be able resolve these ions by integrating these measurements over longer time periods.
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