| Name: | SANDEEP VISHWAKARMA |
| Affiliation: | TATA INSTITUTE OF FUNDAMENTAL RESEARCH, MUMBAI |
| Conference ID : | ASI2024_160 |
| Title : | Medium Energy Detector Board Development, Readout, and Testing for Daksha Satellite |
| Authors : | Sandeep Vishwakarma1, Abhijeet Ghodgaonkar1, Jayprakash Koyande1, Anuraag Arya2, Varun Bhalerao2, Shriharsh Tendulkar1,Santosh Vadawale3, Arpit Patel3, Mithun Neelakandan PS3, Ayush Nema1, Sujay Mate1 |
| Authors Affiliation: | 1 Sandeep Vishwakarma, Jayprakash Koyande, Shriharsh Tendulkar, Ayush Nema, Sujay Mate (Tata Institute of Fundamental Research, Mumbai-400005, India)
2 Abhijeet Ghodgaonkar, Anuraag Arya, Varun Bhalerao (Indian Institute of Technology, Mumbai-400076, India)
3 Santosh Vadawale, Arpit Patel, Mithun Neelakandan PS (Raman Research Institute, Bengaluru-560080, India) |
| Mode of Presentation: | Oral |
| Abstract Category : | Facilities, Technologies and Data science |
| Abstract : | Daksha is a proposed two-satellite mission with an all-sky coverage and broadband energy range (~1 keV to 1 MeV) for detecting X-ray and gamma-ray transients. The main science drivers for Daksha are gamma-ray bursts and electromagnetic counterparts to gravitational wave events. The satellites will be able to address a large number of other science cases including magnetar flares, pulsars, X-ray transients, etc. Daksha’s primary payload is built from Cadmium Zinc Telluride (CZT) detectors operating between 20-200 keV. A set of twenty detectors and the front-end electronics are packaged together to make a “Medium Energy Package” (MEP) that is replicated seventeen times on each Daksha satellite. Here we will discuss the development of the ME Board, the FPGA scheme for high-speed readout from all the CZT detectors while maintaining good timing accuracy (<2 microsecond), and high throughput required by the science cases. We will discuss the characterization of the board’s performance and energy resolution achieved from the CZT detectors at room temperature and the planned operating temperature. In order to achieve throughput and energy resolution, various schemes to minimize excess noise from the on-board and external high voltage supplies were tried out. We will discuss the lessons learnt from the design and improvements to be made in the next versions of the readout boards. Finally, we will discuss the plans for the large-scale ground calibration of CZT detectors (with about 1500 detectors).
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