Name: Abhijeet Ghodgaonkar
Affiliation: Indian Institute of Technology Bombay
Conference ID : ASI2022_438
Title : Daksha front-end electronics and readout systems
Authors : Abhijeet Ghodgaonkar (IIT Bombay), Sandeep Vishwakarma (TIFR), Arpit Patel (PRL), Mithun NPS (PRL), Hrishikesh Belatikar (IIT Bombay, University of Wisconsin-Madison), Sanjoli Narang (IIT Bombay), Amit Shetye (IIT Bombay), Jayprakash Koyande (TIFR), Varun Bhalerao (IIT Bombay), Siddharth Tallur (IIT Bombay), Shriharsh Tendulkar (TIFR), Santosh Vadawale (PRL)
Abstract Type: Poster
Abstract Category : Instrumentation and Techniques
Abstract : The proposed Daksha mission will use three types of detector units to obtain broadband spectral coverage from 1 keV to > 1 MeV. Key among these are the Cadmium Zinc Telluride (CZT) detectors, covering the medium energy (ME) range from 20 - 200 keV. These detectors are organised into 17 ME boxes distributed over the satellite, each containing 20 detectors and corresponding front-end electronics. The electronics boards consist of analog and digital components, alongside a high voltage power supply. The detectors will be clocked at microsecond resolution. Each board has a single Microchip FPGA that is responsible for communication between all 20 detectors on the board and the central processing electronics (PE). PE commands can be relayed to individual detectors for direct operations like enabling or disabling pixels. The FPGA reads data from all detectors, adds timestamps, packetizes the data, and sends it to the PE. For laboratory testing, the PE is replaced by a National Instruments Data Acquisition card (DAQ). Custom LabVIEW software has been developed to read the data, visualise it, and store it in convenient file formats. Laboratory testing has yielded satisfactory performance. We present results and comparisons with AstroSat CZTI lab tests.