| Name: | Anuraag Arya |
| Affiliation: | IIT Bombay |
| Conference ID : | ASI2024_981 |
| Title : | Demonstration of Compton Imaging in Hard X-rays |
| Authors : | Anuraag Arya 1, Sandeep Vishwakarma 2, Harmanjeet Singh Bilkhu 1, Abhijeet Ghodegaonkar 2, Jayprakash Koyande 2, Sudhanshu Nimbalkar 1, Sanjoli Narang 1, Pranav Page 1, Amit Shetye 1, Hrishikesh Belatikar 1, Sourav Palit 4, Aditi Marathe 1, Shriharsh Tendulkar 2, Siddharth Tallur 1, Varun Bhalerao 1, Santosh Vadawale 3
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| Authors Affiliation: | 1.Department of Physics, IIT Bombay, Powai, Mumbai - 400076, India
2.Department of Astronomy and Astrophysics, TIFR , Colaba, Mumbai - 400005, India
3.Astronomy and Astrophysics division, PRL, Ahmedabad - 380054,India
4. ICSP, Netai Nagar, Kolkata-700099, India
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| Mode of Presentation: | Poster |
| Abstract Category : | High Energy Phenomena, Fundamental Physics and Astronomy |
| Abstract : | Hard X-ray photons with energies in the range of hundreds of keV typically undergo Compton scattering when they are incident on a detector. In this process, an incident photon deposits a fraction of its energy at the point of incidence and continues onwards with a change in direction that depends on the amount of energy deposited. By using a pair of detectors to detect the point of incidence and the direction of the scattered photon, we can calculate the scattering direction and angle. By detecting many Compton photon pairs from a source, we can reconstruct the position of the source in the sky.
We demonstrate this principle in the laboratory by using a pair of Cadmium Zinc Telluride detectors sensitive in the energy range of 20-200 keV. The laboratory setup consists of the two detectors placed perpendicular to each other in a lead-lined box. The detectors are read out by a custom-programmed Xilinx PYNQ FPGA board, and data is then transferred to a PC. The detectors are first calibrated using lines from Am-241 and Eu-155 sources. We then use the 356 keV line of a collimated Ba-133 source to irradiate the detectors. We run a Compton reconstruction algorithm to correctly infer the location of the source in the detector frame. This is the first-ever demonstration of a Compton imaging camera in the Hard X-ray regime. I will present the details of our setup, the data acquisition process, and software algorithms, and will showcase our results for the first time. |
