Scintillation and ionization ratio of liquid argon for electronic and nuclear recoils at drift-fields up to 3 kV/cm

Washimi, T.; Kimura, Masato; Tanaka, M.; Yorita, K.

doi:10.1016/j.nima.2018.09.019

Cited by 5 publications

(6 citation statements)

References 22 publications

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“…This factor has been estimated using phenomenological models in Refs. [124,125,126,127], andinvestigated in direct calibration measurements in both argon [128,129,130,131] and xenon [132,133,134]. A selection of these data have been used by the NEST collaboration to make a global fit for q ef f (E R ) [118,135].…”

Section: Properties Of Liquid Noble Element Detectorsmentioning

confidence: 99%

Neutrino Backgrounds in Future Liquid Noble Element Dark Matter Direct Detection Experiments

Gaspert,

Giampa,

Morrissey

2021

Preprint

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Experiments that use liquid noble gasses as target materials, such as argon and xenon, play a significant role in direct detection searches for WIMP(-like) dark matter. As these experiments grow in size, they will soon encounter a new background to their dark matter discovery potential from neutrino scattering off nuclei and electrons in their targets. Therefore, a better understanding of this new source of background is crucial for future large-scale experiments such as ARGO and DARWIN. In this work, we study the impact of atmospheric neutrino flux uncertainties, electron recoil rejection efficiency, recoil energy sensitivity, and other related factors on the dark matter discovery reach. We also show that a significant improvement in sensitivity can potentially be obtained, at large exposures, by combining data from independent argon and xenon experiments.

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Section: Properties Of Liquid Noble Element Detectorsmentioning

confidence: 99%

Neutrino Backgrounds in Future Liquid Noble Element Dark Matter Direct Detection Experiments

Gaspert,

Giampa,

Morrissey

2021

Preprint

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“…The main difference in respect to the thermal spike produced by the µBH consists in the fact that for the Ar selfrecoil the electronic energy loss is higher, and it produces the most important peak in the electronic temperature at times characteristic to the electronic sub-system, while the peak corresponding to the transfer for the molecular sub-system is comparatively lower. The energy transferred from the molecular to the electronic subsystem on unit range has been calculated [37] as:…”

Section: Resultsmentioning

confidence: 99%

“…Unfortunately, the basic properties of S1 and S2 of argon are not well known. Recently, Washimi and coworkers [37,38] focused their studies on the drift-field dependence of S2/S1 properties for the interval 0.2 -3.0 kV/cm, of interest for two-phase argon detectors. In figure 2 from reference [38] the drift field dependences of S1 and S2 signals are presented, as well as the S2/S1 ratio properties with a two-phase detector at drift-fields [37].…”

Section: Production Of Scintillation Light In Liquid Argonmentioning

confidence: 99%

About detecting very low mass black holes in LAr detectors

Lazanu,

Pârvu

2020

Preprint

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The nature of dark matter is still an open problem. The simplest assumption is that gravity is the only force coupled certainly to dark matter and thus the micro black holes could be a viable candidate. We investigated the possibility of direct detection of micro black holes with masses around and upward the Planck scale (10 −5 g), ensuring classical gravitational treatment of these objects in the next generation of huge LAr detectors. We show that the signals (ionization and scintillations) produced in LAr enable the discrimination between micro black holes or other particles. It is expected that the trajectories of these micro black holes will appear as crossing the whole active medium, in any direction, producing uniform ionization and scintillation on all the path.

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“…Data were taken under electric fields of 0.0, 0.2, 0.5, 1.0, 2.0, and 3.0 kV/cm. More details are described elsewhere [19][20][21]. Figure 2 shows a schematic of the experimental apparatus used in this measurement.…”

Section: A Detector and Geometrymentioning

confidence: 99%

“…Data were taken under electric fields of 0.0, 0.2, 0.5, 1.0, 2.0, and 3.0 kV/cm. More details are described elsewhere [19][20][21].…”

Section: Apparatus a Detector And Geometrymentioning

confidence: 99%

Measurement of the scintillation efficiency for nuclear recoils in liquid argon under electric fields up to 3 kV/cm

et al. 2019

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We present a measurement of scintillation efficiency for a few tens of keV nuclear recoils (NR) with a liquid argon time projection chamber under electric fields ranging from 0 to 3 kV/cm. The calibration data are taken with 252 Cf radioactive source. Observed scintillation and electroluminescence spectra are simultaneously fit with spectra derived from Geant4-based Monte Carlo simulation and an NR model. The scintillation efficiency extracted from the fit is reported as a function of recoil energy and electric field. This result can be used for designing the detector and for the interpretation of experimental data in searching for scintillation and ionization signals induced by WIMP dark matter. lation efficiency L eff resulting from a few tens of keV of NR under electric fields up to 3 kV/cm. II. NUCLEAR RECOILS MODELA. Framework

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Scintillation and ionization ratio of liquid argon for electronic and nuclear recoils at drift-fields up to 3 kV/cm

Cited by 5 publications

References 22 publications

Neutrino Backgrounds in Future Liquid Noble Element Dark Matter Direct Detection Experiments

Neutrino Backgrounds in Future Liquid Noble Element Dark Matter Direct Detection Experiments

About detecting very low mass black holes in LAr detectors

Measurement of the scintillation efficiency for nuclear recoils in liquid argon under electric fields up to 3 kV/cm

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