Impact of CME on solar wind: First results from Plasma Analyser Package for Aditya (PAPA) payload onboard Aditya-L1 mission
- Paper ID
93540
- author
- company
Vikram Sarabhai Space Centre, Thiruvananthapuram-695 022, INDIA
- country
India
- year
2025
- abstract
Aditya-L1 mission is the first space based solar observatory from Indian soil for exploring the Sun and solar wind. It makes the comprehensive measurements of radiation, particles and magnetic field using seven state-of the art scientific payloads onboard. Plasma Analyser Package for Aditya (PAPA) pay-load is one among them that aims at studying the composition of solar wind ( in the mass range of 1-60 amu) and its energy distribution (in the range from 0.01 - 3 keV for electrons and 0.01 to 25 keV for ions) continuously throughout the mission’s lifetime. PAPA has two sensors; Solar Wind Electron Ener-gy Probe (SWEEP) to measure the solar wind electron flux and Solar Wind Ion Composition AnalyseR (SWICAR) to measure the ion flux and composition as a function of direction and energy. SWEEP will measure only electron parameters whereas SWICAR has two modes of operation – ion mode where ion parameters are measured and electron mode where electron parameters are measured and is synchronized with SWEEP electron observations. These two modes in SWICAR are mutually exclusive. All the three modes of PAPA payload were exercised during the HV commissioning phase on 11th December 2023 and since then electron/ion data are being continuously received. The plasma parameters obtained are compared with the contemporary missions at L1 and found in agreement. After the HV commissioning PAPA has observed a series of Earth directed CMEs. Both the ion and electron data during the events captures by SWEEP and SWICAR sensors during these events clearly showed en-hancements in flux and energisation of particles which are correlated with the magnetic field meas-urements made from MAG payload onboard Aditya-L1. The detailed results will be presented.