| Name: | Kiran L |
| Affiliation: | Udupi Ramachandra Rao Satellite Centre |
| Conference ID : | ASI2024_555 |
| Title : | Spectral Response Function of SoLEXS onboard Aditya-L1 |
| Authors : | Kiran Lakshmipathaiah1, M. C. Ramadevi1, Monoj Bug1, Koushal Vadodariya1, M. K. Tiwari2, Ajit Kumar Singh2, Ayushi Trivedi2, Abhilash R. Sarwade1, S. Vaishali1, Ankur Kushwaha1, Smrati Verma1, Kumar1, K. Sankarasubramanian1,3 |
| Authors Affiliation: | 1 U R Rao Satellite Centre, Bengaluru – 560017, India
2 Raja Ramanna Centre for Advanced Technology, Indore – 452013, India
3 Center of Excellence in Space Sciences India, Indian Institute of Science Education and Research, Kolkata - 741246, India
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| Mode of Presentation: | Oral |
| Abstract Category : | Sun, Solar System, Exoplanets, and Astrobiology |
| Abstract : | Solar Low-energy X-ray Spectrometer (SoLEXS) is a low energy X-ray spectrometer with a high spectral resolution of (< 250 eV at 5.9 keV) instrument on-board Aditya-L1 operating in the energy range 1-22 keV. It aims to carry out spectral studies of the solar flares in the specified energy range in order to understand DC heating mechanism of solar corona and the correlation between solar flares and coronal mass ejections. SoLEXS includes two identical Silicon Drift Detectors (SDDs) with a physical aperture of 3mm and 0.3 mm diameter, respectively, placed in front at a distance of 148mm to handle the large dynamic range in solar flares. In the present work we focus on deriving the spectral response function and energy calibration of SoLEXS. Spectral response of the SoLEXS is obtained by calibrating the payload at the Raja Ramanna Centre for Advanced Technology (RRCAT) synchrotron beamline facility with monoenergetic beams at different energies from 6 to 16 keV. X-ray fluorescence spectra of specific targets (Au, Al, and Ti) are also studied. The Spectral Redistribution Function (SRF) is modelled at different energies using this data and the spectral response is generated for the complete energy range by interpolation of all the individual SRFs obtained. Energy-channel relation for the instrument is studied and is found to be linear in the entire energy range of operation confirming the earlier laboratory data obtained with Radioactive sources. Count rate dependent response of the system is also studied with experiments carried out for different count rates. The results are discussed in this presentation. |
