Ultra-high energy cosmic ray detector TUS: preliminary results of the first year of measurements

Климов, П. А.; Lomonosov-UHECR,

doi:10.22323/1.301.1098

Cited by 4 publications

(2 citation statements)

References 34 publications

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“…To generate a reference data base (RDB) with 1000 simulated events, we choose the following parameters distribution: 2 The pixel distribution of the signal was performed using a 2D isotropic Gaussian PSF. The characteristic size of the PSF was selected to correspond to the control optical tests [12]. Measurements showed that the diameter of the circle of confusion with 70% of full energy of the image d 70 varies from 15 mm in the center of the photodetector to 23-27 mm at the edge.…”

Section: Simulated Events Reconstructionmentioning

confidence: 99%

Kinematics reconstruction of the EAS-like events registered by the TUS detector

Sharakin

Hernandez

2021

J. Inst.

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The Tracking Ultraviolet Set-up (TUS) is the world’s first orbital imaging detector of Ultra High Energy Cosmic Rays (UHECR) and it operated in 2016–2017 as part of the scientific equipment of the Lomonosov satellite. The TUS was developed and manufactured as a prototype of the larger project K-EUSO with the main purpose of testing the efficiency of the method for measuring the ultraviolet signal of extensive air shower (EAS) in the Earth’s night atmosphere. Despite the low spatial resolution (∼5 × 5 km2 at sea level), several events were recorded which are very similar to EAS as for the signal profile and kinematics. Reconstruction of the parameters of such events is complicated by a short track length, an asymmetry of the image, and an uncertainty in the sensitivity distribution of the TUS channels. An advanced method was developed for the determination of event kinematic parameters including its arrival direction. In the present article, this method is applied for the analysis of 6 EAS-like events recorded by the TUS detector. All events have an out of space arrival direction with zenith angles less than 40°. Remarkably they were found to be over the land rather close to United States airports, which indicates a possible anthropogenic nature of the phenomenon. Detailed analysis revealed a correlation of the reconstructed tracks with direction to airport runways and Very High Frequency (VHF) omnidirectional range stations. The method developed here for reliable reconstruction of kinematic parameters of the track-like events, registered in low spatial resolution, will be useful in future space missions, such as K-EUSO.

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Section: Simulated Events Reconstructionmentioning

confidence: 99%

Kinematics reconstruction of the EAS-like events registered by the TUS detector

Sharakin

Hernandez

2021

J. Inst.

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“…An EAS can be detected as a track in the atmosphere with its ultraviolet (UV) radiation in the near-visible wavelength band of 300-400 nm. The TUS electronic trigger was designed to select UHECR transient tracks [5] and the first candidates for UHECR events were found and analyzed [6,7].…”

Section: Introductionmentioning

confidence: 99%

Remote Sensing of the Atmosphere by the Ultraviolet Detector TUS Onboard the Lomonosov Satellite

et al. 2019

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The orbital detector TUS (Tracking Ultraviolet Setup) with high sensitivity in near-visible ultraviolet (tens of photons per time sample of 0.8 μ s of wavelengths 300–400 nm from a detector’s pixel field of view) and the microsecond-scale temporal resolution was developed by the Lomonosov-UHECR/TLE collaboration and launched into orbit on 28 April 2016. A variety of different phenomena were studied by measuring ultraviolet signals from the atmosphere: extensive air showers from ultra-high-energy cosmic rays, lightning discharges, transient atmospheric events, aurora ovals, and meteors. These events are different in their origin and in their duration and luminosity. The TUS detector had a capability to conduct measurements with different temporal resolutions (0.8 μ s, 25.6 μ s, 0.4 ms, and 6.6 ms) but the same spatial resolution of 5 km. Results of the TUS detector measurements of various atmospheric emissions are discussed and compared to data from previous experiments.

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Air shower observation by a simple structured Fresnel lens telescope with a single pixel for the next generation of ultra-high-energy cosmic ray observatories

Tameda

Tomida

Yamamoto

et al. 2019

Progress of Theoretical and Experimental Physics

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Improved statistics and mass-composition-sensitive observation are required to clarify the origin of ultra-high energy cosmic rays (UHECRs). Inevitably in the future, the UHECR observatories will have to be expanded due to the small flux; however, the upgrade will be expensive with the detectors currently in use. Hence, we are developing a new fluorescence detector for UHECR observation. The proposed fluorescence detector, called cosmic ray air fluorescence Fresnel-lens telescope (CRAFFT), has an extremely simple structure and can observe the longitudinal development of an air shower. Furthermore, CRAFFT has the potential to significantly reduce costs for the realization of a huge observatory for UHECR research. We deployed four CRAFFT detectors at the Telescope Array site and conducted the test observation. We have successfully observed ten air-shower events using CRAFFT. Thus, CRAFFT can be a solution to realize the next generation of UHECR observatories.

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Ultra-high energy cosmic ray detector TUS: preliminary results of the first year of measurements

Cited by 4 publications

References 34 publications

Kinematics reconstruction of the EAS-like events registered by the TUS detector

Kinematics reconstruction of the EAS-like events registered by the TUS detector

Remote Sensing of the Atmosphere by the Ultraviolet Detector TUS Onboard the Lomonosov Satellite

Air shower observation by a simple structured Fresnel lens telescope with a single pixel for the next generation of ultra-high-energy cosmic ray observatories

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