The Ultra-High Energy Cosmic Ray Spectrum Measured by the Telescope Array's Middle Drum Detector

TL;DR

This paper reports the measurement of the ultra-high energy cosmic ray spectrum using the Telescope Array's Middle Drum detector, showing good agreement with previous HiRes results and demonstrating the detector's effectiveness.

Contribution

It presents the first spectrum measurement from the Middle Drum detector, validating its performance against the HiRes experiment and contributing to cosmic ray research.

Findings

The spectrum measured by Middle Drum agrees with HiRes spectra.

The Middle Drum detector's results are consistent and reliable.

The study confirms the detector's capability for cosmic ray spectrum measurement.

Abstract

The Telescope Array's Middle Drum fluorescence detector was constructed using refurbished telescopes from the High Resolution Fly's Eye (HiRes) experiment. As such, there is a direct comparison between these two experiments' fluorescence energy spectra. An energy spectrum has been calculated based on one year of collected data by the Middle Drum site of Telescope Array and agrees well with the HiRes monocular spectra. The quality of the Middle Drum results has also been determined to show good agreement.