A double-layered Water Cherenkov Detector array for Gamma-ray astronomy

Kunwar, S.; Goksu, Hazal; Hinton, Jim; Schoorlemmer, H.; Smith, A. J.; Hofmann, Werner; Werner, F.

doi:10.1016/j.nima.2023.168138

Cited by 7 publications

(5 citation statements)

References 34 publications

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“…A long-established discriminant between gamma and background showers is muon content, and the power of this approach has recently been demonstrated by LHAASO [11]. Two different approaches are being pursued in SWGO to tag (or better count) -2 - muons passing through individual detector units: a double layer approach [12] and multiple-PMTs in a single shallow layer [13].…”

Section: Detector Optionsmentioning

confidence: 99%

SWGO: a wide-field of view gamma-ray observatory in the southern hemisphere

Chiavassa

2024

J. Inst.

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The recent LHAASO and HAWC results opened the way to the search of gamma ray sources emitting at energies above 100 TeV. Both detectors are in the northern hemisphere; the need for such an observatory in the southern hemisphere is therefore clear. The goal of the SWGO collaboration is the construction of a wide field of view, high duty cycle observatory to explore the Southern hemisphere sky searching for gamma ray sources at energies above 100 GeV. Such an array will detect extensive air showers particles and must be able to select the photon originated showers from the background of the hadronic ones. The experiment must be located in a site at latitude between 10° and 30° degrees south and at an altitude above 4400 m a.s.l. The baseline detection technique chosen by the collaboration is Water Cherenkov Detectors. The array will have a central region with high fill factor (>60%) and a large (about 1 km2) outer region with a much lower fill factor (around 4–5%).

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Section: Detector Optionsmentioning

confidence: 99%

SWGO: a wide-field of view gamma-ray observatory in the southern hemisphere

Chiavassa

2024

J. Inst.

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“…SWGO strives to push the boundaries by redesigning the detector concepts to achieve enhanced gamma/hadron discrimination power and efficient identification of EAS muons [11]. One of the ideas being explored involves constructing WCDs with two chambers [12], where the bottom…”

Section: Core Science Case Design Driversmentioning

confidence: 99%

The Southern Wide-field Gamma-ray Observatory

Conceição¹

2023

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

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The Southern Wide-field Gamma-ray Observatory (SWGO) is an R&D project to plan and design the next observatory to detect gamma rays in the Southern hemisphere. The experiment, planned to be placed at an altitude greater than 4400 m, is primarily based on water Cherenkov detectors units and is expected to measure gamma rays from a few hundred GeV up to the PeV scale. SWGO will complement CTA and the existing ground-based particle detectors of the Northern Hemisphere, namely HAWC and LHAASO, having a rich science programme. The collaboration is highly invested in evaluating different detector and array configurations, prototyping, and site search. In this presentation, I shall present an overview of the project's activities, achievements and future plans.

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“…In the double-chamber designs, a single PMT support structure houses a PMT facing upward for the electromagnetic chamber, and a second PMT facing downward for the muon chamber. Optimization studies regarding the aspect ratio of these optically separate volumes [7] show that a ratio of 2.5 to 0.5 would optimize the cost and signal. The optimal height of these volumes also depends on their diameter.…”

Section: Detector Unit Designmentioning

confidence: 99%

Updates on the Lake Design for SWGO

Goksu¹

2023

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

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The lake concept is one of the detector design options considered for the Southern Wide-field Gamma-ray Observatory (SWGO), a next-generation high altitude gamma-ray observatory in the southern hemisphere consisting of an array of water Cherenkov detectors. With its wide energy range, wide field of view, large duty cycle and location it will complement the other existing and planned gamma-ray observatories. In the lake concept, instead of having tanks filled with water, bladders filled with clean water are deployed near the surface of a natural or artificial lake. Each bladder is a light-tight stand-alone unit containing one or more photosensors. The prototyping efforts for the lake concept are in an advanced stage with multiple options and factors, such as the impact of chosen materials on water quality, being considered. In this contribution, we will give an update on the planning and prototyping studies for this detector design option.

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A double-layered Water Cherenkov Detector array for Gamma-ray astronomy

Cited by 7 publications

References 34 publications

SWGO: a wide-field of view gamma-ray observatory in the southern hemisphere

SWGO: a wide-field of view gamma-ray observatory in the southern hemisphere

The Southern Wide-field Gamma-ray Observatory

Updates on the Lake Design for SWGO

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