Name: Prashant Kumar
Affiliation: Physical Research Laboratory
Conference ID : ASI2022_763
Title : Solar Wind Ion Spectrometer(SWIS): Instrument capability, preliminary test and ground calibration results
Authors : Prashant Kumar, Manan Shah, Arpit R Patel, Hitesh L Adalja, Pranav R Adhyaru, M Shanmugam, D Chakrabarty, Bhas Bapat, P Janardhan, S B Banerjee, K P Subramanian, Tinkal Ladiya, Sushil Kumar, Santosh V Vadawale, Shiv K Goyal, Aveek Sarkar, Neeraj K Tiwari
Abstract Type: Invited
Abstract Category : Instrumentation and Techniques
Abstract : Solar Wind Ion Spectrometer (SWIS) is a subsystem of Aditya Solar Wind Particle Experiment(ASPEX) payload onboard ISRO’s first dedicated solar mission, Aditya-L1. SWIS will carry out in-situ measurement of particle fluxes from multiple directions at the first Lagrangian point of the sun-earth system. The primary objective of the instrument is to study the anisotropy in the solar wind by having differential measurements in angle and energy. The instrument is aptly configured with two top-hat electrostatic analysers covering an energy range of 100eV to 20keV with 360degree field-of-view in ecliptic and plane perpendicular to it. The instrument has mass resolved measurement capability along the ecliptic plane which facilitates the evaluation of the effectiveness of proton-to-alpha ratio as a marker of various transient events. The instrument can be configured to operate in different modes as key parameters are command-able and its operation will be through a proposal system. In this talk an overview of the capability of the instrument will be presented vis-a-vis existing instruments available at L1 point. The planned data products, possible instrument configurations and development of ground segment will also be presented. Finally, some of the preliminary test and ground calibration results on the actual flight model will be discussed. The instrument performance with respect to its design value will be evaluated for the realized flight model.