2014/01/04 by Joshua J. Cogliati, Kurt Derr, Kurt W. Derr +4 · 1 voice
Engineering · Physics and Astronomy · #CCD and CMOS Imaging Sensors #Particle Detector Development and Performance #Radiation Detection and Scintillator Technologies #nucl-ex #physics.ins-det
paper · pdf · doi:10.48550/arxiv.1401.0766
openalex publication_date 2014/01/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The CMOS camera found in many cellphones is sensitive to ionized electrons. Gamma rays penetrate into the phone and produce ionized electrons that are then detected by the camera. Thermal noise and other noise needs to be removed on the phone, which requires an algorithm that has relatively low memory and computational requirements. The continuous high-delta algorithm described fits those requirements. Only a small fraction of the energy of even the electron is deposited in the camera sensor, so direct methods of measuring the energy cannot be used. The fraction of groups of lit up pixels that are lines is correlated with the energy of the gamma rays. This correlation under certain conditions allows limited low resolution energy resolution to be performed.