Latest results of ultra-high-energy cosmic ray measurements with prototypes of the Fluorescence detector Array of Single-pixel Telescopes (FAST)

Fujii, Toshihiro; Albury, Justin M.; Bellido, J. A.; Chytka, L.; Farmer, John; Hamal, P.; Horváth, P.; Hrabovský, M.; Kubo, H.; Kvita, J.; Malacari, M.; Mandát, Dušan; Mastrodicasa, Massimo; Matthews, J. N.; Michal, Stanislav; Ni, Xiaochen; Nozaki, Seiya; Nožka, L.; Oka, Tomohiko; Palatka, M.; Pech, M.; Privitera, P.; Schovánek, Petr; Salamida, F.; Šmída, R.; Thomas, S. B.; Taketa, A.; Terauchi, Kenta; Trávničék, P.; Vacula, Martin; Yoo, Seokhyun

doi:10.22323/1.395.0402

Cited by 4 publications

(5 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Fluorescence detector Array of Single-pixel Telescopes (FAST) 1 features compact FD telescopes with a smaller light-collecting area and far fewer pixels than current-generation FD designs, leading to a significant reduction in cost [779,170,169]. Although FAST features only four pixels, it is possible to extract timing information from each individual PMT off the traces to reconstruct energy and X max values, resulting in comparable resolutions to conventional FDs.…”

Section: Fluorescence Detector Array Of Single-pixel Telescopes (Fast)mentioning

confidence: 99%

Ultra-High-Energy Cosmic Rays: The Intersection of the Cosmic and Energy Frontiers

Coleman,

Eser,

Mayotte

et al. 2022

Preprint

View full text Add to dashboard Cite

Pin down the shower energy observable to use μ as a composition-only Reduce hadronic uncertainties interaction model E threshold (TBD) Other messengers Galactic * μ / em separation † * depending on analysis progress † depending on detector configuration• At least one next-generation experiment needs to be able to make high-precision measurements to explore new particle physics and measure particle rigidity on an event-by-event basis. Of the planned next-generation experiments, GCOS is the best positioned to meet this recommendation.• As a complementary effort, experiments with sufficient exposure ( 5 × 10 5 km 2 sr yr) are needed to search for Lorentz-invariance violation (LIV), SHDM, and other BSM physics at the Cosmic and Energy Frontiers, and to identify UHECR sources at the highest energies.• Full-sky coverage with low cross-hemisphere systematic uncertainties is critical for astrophysical studies. To this end, next generation experiments should be space-based or multi-site. Common sites between experiments are encouraged.• Based on the productive results from inter-collaboration and inter-disciplinary work, we recommend the continued progress/formation of joint analyses between experiments and with other intersecting fields of research (e.g., magnetic fields).• The UHECR community should continue its efforts to advance diversity, equity, inclusion, and accessibility. It also needs to take steps to reduce its environmental impacts and improve open access to its data to reduce the scientific gap between countries.vi

show abstract

Section: Fluorescence Detector Array Of Single-pixel Telescopes (Fast)mentioning

confidence: 99%

Ultra-High-Energy Cosmic Rays: The Intersection of the Cosmic and Energy Frontiers

Coleman,

Eser,

Mayotte

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…The reconstructed energy and 𝑋 max by FAST@TA are 1.7 × 10 18 eV and 816 g cm −2 . We have reported 59 significant events between March 2018 and October 2019 in the previous ICRC [17]. We found additional 20 UHECR candidates since 2019.…”

Section: Observation Status and Performance Estimation Of Fast Protot...mentioning

confidence: 60%

Detecting ultra-high-energy cosmic rays with prototypes of the Fluorescence detector Array of Single-pixel Telescopes (FAST) in both hemispheres

Sakurai¹,

Albury²,

Bellido³

et al. 2023

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)

View full text Add to dashboard Cite

Ultra-high energy cosmic rays (UHECRs), whose energy are beyond 10 18 eV, are the most energetic particles we have ever detected. The latest results seem to indicate a heavier composition at the highest energies, complicating the search for their origins. Due to the limited number of UHECR events, we need to build an instrument with an order of magnitude larger effective-exposure to collect UHECRs in future decades. The Fluorescence detector Array of Single-pixel Telescopes (FAST) is a proposed low-cost, easily deployable UHECR detector suitable for a future ground array. It is essential to validate the telescope design and autonomous observational techniques using prototypes located in both hemispheres. Here we report on the current status of observations, recent performance results of prototypes, and developments towards a future mini-array.

show abstract

“…In [11] FAST@TA data up until September 2019 was analysed for coincidences with the TA fluorescence telescopes, with a total of 21 events found above 10 18 eV. Here we show preliminary results of the analysis of data from October 2019 to February 2023 using the top-down reconstruction…”

Section: Reconstruction Of Data With Fast@tamentioning

confidence: 86%

“…In [10], the neural network approach was developed and shown to give initial estimates able to be optimized by the top-down reconstruction for three representative core positions. Work performed in [11] extended the range of core positions, achieving resolutions of 4.2°in arrival direction, 465 m in core position, 8% in energy, and 30 gcm −2 in 𝑋 max at 40 EeV for 3-fold coincidences.…”

Section: Machine Learning Based First-guess Estimationmentioning

confidence: 99%

Reconstruction procedure of the Fluorescence detector Array of Single-pixel Telescopes

Bradfield¹

2023

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)

View full text Add to dashboard Cite

The Fluorescence detector Array of Single-pixel Telescopes (FAST) is one of several proposed designs for a next-generation cosmic-ray detector. Such detectors will require enormous collecting areas whilst also needing to remain cost-efficient. To meet these demands, the FAST collaboration has designed a simplified, low-cost fluorescence telescope consisting of only four photomultiplier tubes (PMTs). Since standard air shower reconstruction techniques cannot be used with so few PMTs, FAST utilises an alternative two-step approach. In the first step, a neural network is used to provide a first estimate of the true shower parameters. This estimate is then used as the initial guess in a minimisation procedure where the measured PMT traces are compared to simulated ones, and the best-fit shower parameters are found. A detailed explanation of these steps is given, with the expected performance of FAST prototypes at the Telescope Array experiment acting as a demonstration of the technique.

show abstract

Latest results of ultra-high-energy cosmic ray measurements with prototypes of the Fluorescence detector Array of Single-pixel Telescopes (FAST)

Abstract: Latest results of ultra-high-energy cosmic ray measurements with prototypes of the Fluorescence detector Array of Single-pixel Telescopes (FAST)

Cited by 4 publications

References 17 publications

Ultra-High-Energy Cosmic Rays: The Intersection of the Cosmic and Energy Frontiers

Ultra-High-Energy Cosmic Rays: The Intersection of the Cosmic and Energy Frontiers

Detecting ultra-high-energy cosmic rays with prototypes of the Fluorescence detector Array of Single-pixel Telescopes (FAST) in both hemispheres

Reconstruction procedure of the Fluorescence detector Array of Single-pixel Telescopes

Contact Info

Product

Resources

About