Abstract Details
| Name: Gopala Krishna M R Affiliation: Raman Research Institute Conference ID: ASI2016_859 Title : X-ray Polarimeter POLIX: Signal Processing Electronics development Authors and Co-Authors : Rishin P.V., Biswajit Paul, Varun B., Duraichelvan R., Mohamed Ibrahim, Rajagopala G., Sandhya P., Mamatha T.S., Ezhilarasi M.S., Nagaraja H.N., Pooja Verma and Affiliation: Raman Research Institute, Bangalore Abstract Type : Poster Abstract Category : Instrumentation and Techniques Abstract : We describe the signal processing electronics for the Thomson X-ray polarimeter. The main requirement for the X-ray polarimeter is to determine the degree and the direction of polarisation of the incoming X-ray photons impinging on the detector. This requires finding out the position at which the photons are absorbed in the X-ray detectors. The electronics system amplifies the charge pulses from the detector, checks for the anti-coincidence so as to reject the charge particle background, digitises the peaks of the pulses at the two ends of the resistive wire and finds out the position of the incoming photons from these measurements using the principle of charge division. The electronics also time stamps the X-ray events data, packages it and stores it so as to transfer to the satellite bus. Apart from the signal processing section, the electronics also has the high-voltage section for biasing the detectors, a house-keeping system for monitoring the status of the entire payload and a telecommand system to command and control the payload from the satellite. All the signal processing operations are carried out using FPGA's. Different aspects related to design and development of the system along with the test results obtained will be presented. |