Active Inspection of Nuclear Materials Using [sup 4]He Scintillation Detectors

Davatz, G.; Chandra, Rico; Gendotti, U.; Howard, A. S.

doi:10.1063/1.3665333

Cited by 12 publications

(11 citation statements)

References 0 publications

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“…An Helium calorimeter for Anti-Deuteron identication in cosmic rays F. Nozzoli In particular the obtained (single side) time resolutions of 3.9 ± 0.2 ns for ∼ 0.3 MeV and 1.36 ± 0.04 ns for ∼ 3 MeV are in reasonable agreement with the time resolution of 2.4 ns achieved in [14] testing the same type of detector with a collimated 137 Cs source. This…”

Section: Pos(icrc2021)052supporting

confidence: 74%

“…Helium gas is a fast UV scintillator, having a light yield similar to other fast plastic/liquid scintillators and capable of ∼ ns timing performances [14]. The HeCal is surrounded by three layers, made by 4 mm thick plastic scintillator bars, providing velocity measurement (β) by Time of Flight (ToF) and charge measurement (Z) by ionization energy loss measurement (dE/dX ).…”

Section: Antideuteron Identication With the Adhd Experimentmentioning

confidence: 99%

“…The inner wall of the chamber is lined with a wavelength shifter to convert ultra-violet He scintillation to the optical wavelengths for the PMTs. Response of this detector to fast neutrons are extensively studied [14,1721]. However for the aim of ADHD project the response of He scintillation to charged (stopping) particles is necessary.…”

Section: Measurements On Hecal Prototype Arktis B-470mentioning

confidence: 99%

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An Helium calorimeter for Anti-Deuteron identification in cosmic rays

Nozzoli¹,

Dimiccoli²,

Iuppa³

et al. 2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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The observation of sub-GeV antideuteron in the cosmic ray ux could be a very strong signature of dark matter annihilation in our galaxy. The goal of the Anti Deuteron Helium Detector (ADHD) project is to study the signatures oered by an high pressure Helium calorimeter for the identication of antideuterons in space. The performance of an high pressure (200 bar) Helium scintillator prototype, capable of fast timing, will be shown.

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Section: Pos(icrc2021)052supporting

confidence: 74%

Section: Antideuteron Identication With the Adhd Experimentmentioning

confidence: 99%

Section: Measurements On Hecal Prototype Arktis B-470mentioning

confidence: 99%

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An Helium calorimeter for Anti-Deuteron identification in cosmic rays

Nozzoli¹,

Dimiccoli²,

Iuppa³

et al. 2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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“…The vessel wall thickness of about 3 cm (mass about 100 kg) ensures a burst pressure larger than 800 bar; a similar system is already considered for helium transportation in space or for H 2 tanks [176]. Helium gas is a fast UV scintillator, having a light yield similar to other fast plastic or liquid scintillators and capable of providing nanosecond timing performance [177]. The HeCal is surrounded by a Figure 13: The ADHD instrument is made of a 400 bar helium-gas calorimeter (HeCal) surrounded by a time-of-flight system with three scintillator layers.…”

Section: The Adhd Experimentsmentioning

confidence: 99%

Cosmic-ray antinuclei as messengers of new physics: status and outlook for the new decade

Doetinchem

Perez

Aramaki

et al. 2020

J. Cosmol. Astropart. Phys.

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The precise measurement of cosmic-ray antinuclei serves as an important means for identifying the nature of dark matter and other new astrophysical phenomena, and could be used with other cosmic-ray species to understand cosmic-ray production and propagation in the Galaxy. For instance, low-energy antideuterons would provide a "smoking gun" signature of dark matter annihilation or decay, essentially free of astrophysical background. Studies in recent years have emphasized that models for cosmic-ray antideuterons must be considered together with the abundant cosmic antiprotons and any potential observation of antihelium. Therefore, a second dedicated Antideuteron Workshop was organized at UCLA in March 2019, bringing together a community of theorists and experimentalists to review the status of current observations of cosmic-ray antinuclei, the theoretical work towards understanding these signatures, and the potential of upcoming measurements to illuminate ongoing controversies. This review aims to synthesize this recent work and present implications for the upcoming decade of antinuclei observations and searches. This includes discussion of a possible dark matter signature in the AMS-02 antiproton spectrum, the most recent limits from BESS Polar-II on the cosmic antideuteron flux, and reports of candidate antihelium events by AMS-02; recent collider and cosmic-ray measurements relevant for antinuclei production models; the state of cosmic-ray transport models in light of AMS-02 and Voyager data; and the prospects for upcoming experiments, such as GAPS. This provides a roadmap for progress on cosmic antinuclei signatures of dark matter in the coming years.

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“…However, following the current shortage and the consequent cost increase [6] , alternatives are being searched for [7]. ARKTIS, a spin-off company of ETH, the Zürich Polytechnical School, is exploiting a technique based on the detection of scintillating light in a high-pressure 4 He vessel [8]- [10]. This paper reports the first results on the use of Silicon Photomultipliers as photosensors in the ARKTIS baseline detector, expected to provide a cost effective solution with enhanced sensitivity.…”

Section: Introductionmentioning

confidence: 99%