Abstract Details
| Name: MANOJ VARMA SRI VATCHAVAI Affiliation: INDIAN INSTITUTE OF ASTROPHYSICS Conference ID: ASI2025_175 Title : The Solar Ultra-Violet Imaging Telescope: Detector characterization and on-board processing for flare studies Authors and Co-Authors : Manoj Varma Sri Vatchavai Abstract Type : Oral Abstract Category : Thesis Abstract : The Solar Ultraviolet Imaging Telescope (SUIT) is one of the payloads onboard the Aditya-L1 mission. SUIT will be imaging the Sun in the near Ultraviolet wavelength range (200 -400 nm) in 11 spectral bands using narrow and medium band-pass spectral filters covering a Field of View (FOV) of 1.5 solar radii. SUIT uses a 4k x 4k CCD sensor for photon detection. One of the important observational goals of SUIT is to obtain high-cadence flare data from the initial stages of the flare evolution. This thesis includes studying, developing, characterizing, and testing different subsystems of SUIT concerning this observational goal. One of the most important subsystems of SUIT is the CCD which is placed at its focal plane. The CCD characterization test setup and procedures are explained and the measured values of various parameters including noise, dark current, gain, linearity, and cross-talk are presented in this thesis. The results show a satisfactory performance from the CCD as well as the readout electronics to meet the specifications required by the SUIT payload. The SUIT onboard intelligence algorithm is the next important step to obtaining high-cadence flare data. The complete intelligence algorithm consists of the HEL1OS flare-trigger module, the flare-localization module, the Region of Interest (RoI) tracking module, and the auto-exposure control module. This thesis explains the working of these modules, their development, and testing. SUIT operation will be carried out by using a set of observation sequences. The testing of these sequences and verifying the output image data is presented in the final part of this thesis. |