arXiv subjects

Jeff Swaney

Publications and source records attributed to Jeff Swaney.

2 recordsLinked to original sources

arXiv2021

Data Acquisition System for a Distributed Smartphone Cosmic Ray Observatory

A scientific instrument comprised of a global network of millions of independent, connected, remote devices presents unique data acquisition challenges. We describe the software design of a mobile application which collects data from smartphone cameras without overburdening the phone's CPU or battery. The deployed software automatically calibrates to heterogeneous hardware targets to improve the quality and manage the rate of data transfer, and connects to a cloud-based data acquisition system which can manage and refine the operation of the network.

astro-ph.IM↗

arXiv2021

Measurement of Smartphone Sensor Efficiency to Cosmic Ray Muons

A measurement of the efficiency of CMOS sensors in smartphone cameras to cosmic ray muons is presented. A coincidence in external scintillators indicates the passage of a cosmic ray muon, allowing the measurement of the efficiency of the CMOS sensor. The observed flux is consistent with well-established values, and efficiencies are presented as a function of the number of photo-electrons collected from the CMOS silicon photodiode pixels. These efficiencies are vital to understanding the feasibility of large-scale smartphone networks operating as air-shower observatories.

astro-ph.IM↗