Abstract Details
| Name: Shiv Kumar Goyal Affiliation: PRL, Ahmedabad Conference ID: ASI2018_1260 Title : Supra Thermal & Energetic Particle Spectrometer (STEPS), onboard Aditya-L1 mission Authors and Co-Authors : S. K. Goyal (PRL, Ahmedabad), A. R. Patel (PRL, Ahmedabad), Neeraj K. Tiwari (PRL, Ahmedabad), M. Shanmugam (PRL, Ahmedabad), T. Ladiya (PRL, Ahmedabad), Aaditya Sarada (PRL, Ahmedabad), S. Vadawale (PRL, Ahmedabad), P. Janardhan (PRL, Ahmedabad), D. Chakrabarty (PRL, Ahmedabad), A. Sarkar (PRL, Ahmedabad), Hitesh L. Adalja (PRL, Ahmedabad), A. K. Hait (SAC, Ahmedabad), R. Bhavsar (SAC, Ahmedabad), M. Chauhan (SAC, Ahmedabad), S. B. Banerjee (PRL, Ahmedabad), P. Kumar (PRL, Ahmedabad), K. P. Subramanian (PRL, Ahmedabad), B. Bapat (IISER, Pune), P. R. Adhyaru (PRL, Ahmedabad), Manan Shah (PRL, Ahmedabad) and M. B. Dadhania (PRL, Ahmedabad) Abstract Type : Contributed Talk Abstract Category : Instrumentation and Techniques Abstract : Supra Thermal & Energetic Particle Spectrometer (STEPS) is an independent subsystem of the ASPEX experiment. ASPEX (Aditya Solar Wind Particle EXperiment) has been selected as one of the possible experiments onboard the Aditya - L1 mission (forthcoming Indian solar mission), which is to be placed in a halo orbit around the L1 Lagrangian point, lying between the Sun and the Earth at a distance of 1.5 million km from the Earth. Primary objective of the ASPEX experiment is to make in - situ, multi - directional measurements of solar wind supra-thermal and high-energy particles. The ASPEX payload has two independent subsystems: SWIS (Solar Wind Ion Spectrometer), which measures the angular and energy distributions of Solar wind ions in the energy range of 100 eV to 20 keV using the technique of electro-static analysis (ESA) followed by magnetic separation of particles, while STEPS - the another subsystem measures the energy spectrum of high energetic particles from six multiple directions, in the energy range of 20 keV/n to 20 MeV/n. The STEPS instrument has been configured into three packages: viz. the STEPS - 1 package, the STEPS - 2 package and the processing electronics package. The STEPS - 1 detector package has 4 detector units, pointing in 4 different directions: SR (Sun Radial), IM (Intermediate - between Sun and Parker Spiral direction), PS (Parker Spiral direction) and NP (Northward). In this package: 2 detector units (SR & PS) will provide particle species (proton and alpha) differentiated energy spectra while other 2 detector units (IM & NP) will provide particle species integrated energy spectra. Similarly STEPS - 2 detector package has 2 detector units: EP (Earth Pointing) and SP (Southward). EP detector unit provides species differentiated energy spectra, while SP detector unit provides species integrated energy spectra. The species differentiating detector unit uses custom designed dual window Si-PIN detector and plastic Scintillator. Dual window Si-PIN detectors are fabricated on a single package with two different thicknesses of dead layers (0.1 micron and 1.0 micron) of high Z material. The Plastic Scintillator (placed below the Si detector package) provides the identifications of the particles up to very high energy (~20 MeV/n) using ΔE-E mode. The other type of detector unit (species integrated spectra) uses a standard Si-PIN detector. In this talk, overall configuration of the STEPS subsystem and its salient features will be discussed. Developmental status of the with the preliminary results will also be presented. |