Directional modulation of electron-ion pairs recombination in liquid argon

Cataudella, V.; Candia, A. de; Filippis, G. De; Catalanotti, S.; Cadeddu, M.; Lissia, M.; Rossi, B.; Galbiati, C.; Fiorillo, G.

doi:10.1088/1748-0221/12/12/p12002

Cited by 14 publications

(17 citation statements)

References 19 publications

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“…It is worth noting that preliminary studies have provided exciting hints of a direction sensitive effect on nuclear recoils in a LAr-TPC [305]. Columnar recombination models [306,307] suggest that the magnitude of the recombination should, under some circumstances, vary with the angle between the electric field and the track direction. A difference in the electron-ion recombination effect is, in fact, expected when the ionising track is either parallel or perpendicular to the electric field.…”

Section: Liquid Argon Detectorsmentioning

confidence: 99%

Direct Detection of Dark Matter -- APPEC Committee Report

Billard,

Boulay,

Cebrián

et al. 2021

Preprint

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This Report provides an extensive review of the experimental programme of direct detection searches of particle dark matter. It focuses mostly on European efforts, both current and planned, but does it within a broader context of a worldwide activity in the field. It aims at identifying the virtues, opportunities and challenges associated with the different experimental approaches and search techniques. It presents scientific and technological synergies, both existing and emerging, with some other areas of particle physics, notably collider and neutrino programmes, and beyond. It addresses the issue of infrastructure in light of the growing needs and challenges of the different experimental searches. Finally, the Report makes a number of recommendations from the perspective of a long-term future of the field. They are introduced, along with some justification, in the opening Overview and Recommendations section and are next summarised at the end of the Report. Overall, we recommend that the direct search for dark matter particle interactions with a detector target should be given top priority in astroparticle physics, and in all particle physics, and beyond, as a positive measurement will provide the most unambiguous confirmation of the particle nature of dark matter in the Universe.

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Section: Liquid Argon Detectorsmentioning

confidence: 99%

Direct Detection of Dark Matter -- APPEC Committee Report

Billard,

Boulay,

Cebrián

et al. 2021

Preprint

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“…In noble liquid TPCs the recoiling nucleus produces both scintillation and ionization. CR models [22,23] predict that the amount of signal due to ionization that can be collected in the presence of an electric field E should depend on the angle θ r between E and the track (the average direction of the straggling nucleus). The ionization signal is expected to be maximal when θ r = 90 • , since electrons drift in a direction perpendicular to the region around the recoil track where ions are present, minimizing recombination.…”

Section: Introductionmentioning

confidence: 99%

Directional dark matter detection sensitivity of a two-phase liquid argon detector

Cadeddu

Lissia

Agnes

et al. 2019

J. Cosmol. Astropart. Phys.

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We examine the sensitivity of a large scale two-phase liquid argon detector to the directionality of the dark matter signal. This study was performed under the assumption that, above 50 keV of recoil energy, one can determine (with some resolution) the direction of the recoil nucleus without head-tail discrimination, as suggested by past studies that proposed to exploit the dependence of columnar recombination on the angle between the recoil nucleus direction and the electric field. In this paper we study the differential interaction recoil rate as a function of the recoil direction angle with respect to the zenith for a detector located at the Laboratori Nazionali del Gran Sasso and we determine its diurnal and seasonal modulation. Using a likelihood-ratio based approach we show that, with the angular information alone, 100 (250) events are enough to reject the isotropic hypothesis at three standard deviation level, for a perfect (400 mrad) angular resolution. For an exposure of 100 tonne years this would correspond to a spin independent WIMP-nucleon cross section of about 10 −46 cm 2 at 200 GeV WIMP mass. The results presented in this paper provide strong motivation for the experimental determination of directional recoil effects in two-phase liquid argon detectors.

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“…The electrons surviving recombination are then drifted towards the liquid-gas boundary, extracted into the gas phase, and accelerated in the gas pocket by a suitable electric field with magnitudes E d (drift field), E ex (extraction field), and E el (electroluminescence field), respectively. The acceleration of electrons by the electric field in the gas pocket produces a secondary signal composed of electroluminescent light [7] and referred to as S2, whose amplitude is proportional to the number of electrons surviving recombination and whose delay with respect to S1 is equal to the time needed for the electrons to drift through the The potential directional sensitivity of a doublephase TPC stems from the dependence of columnar recombination on the alignment of the recoil momentum with respect to the drift field [8]. To further investigate this process, the ReD detector was irradiated with neutrons of known energy and direction, produced via p( 7 Li, 7 Be)n by the TANDEM accelerator at the INFN LNS laboratory in Catania.…”

Section: Abstract Time Projection Chamber • Silicon Photomultipliers ...mentioning

confidence: 99%

Performance of the ReD TPC, a novel double-phase LAr detector with Silicon Photomultiplier Readout

Agnes,

Albergo,

Albuquerque

et al. 2021

Preprint

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Directional modulation of electron-ion pairs recombination in liquid argon

Cited by 14 publications

References 19 publications

Direct Detection of Dark Matter -- APPEC Committee Report

Direct Detection of Dark Matter -- APPEC Committee Report

Directional dark matter detection sensitivity of a two-phase liquid argon detector

Performance of the ReD TPC, a novel double-phase LAr detector with Silicon Photomultiplier Readout

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