Cryogenic photodetectors

Chardin, G.

doi:10.1016/s0168-9002(99)01231-0

Cited by 3 publications

(3 citation statements)

References 30 publications

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“…A neutralino is expected to be non-relativistic and stable, and is more generally classified as a weakly interacting massive particle (WIMP). The open question of the expected mass and crosssection of WIMPs is being addressed by numerous direct and indirect detection experiments [5][6][7], including XENON10.…”

Section: Expected Signal In Xenon10mentioning

confidence: 99%

The scintillation and ionization yield of liquid xenon for nuclear recoils

Sørensen

Manzur

Dahl

et al. 2009

Nuclear Instruments and Methods in Physics Research Section A:

104

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a b s t r a c t XENON10 is an experiment designed to directly detect particle dark matter. It is a dual phase (liquid/ gas) xenon time-projection chamber with 3D position imaging. Particle interactions generate a primary scintillation signal (S1) and ionization signal (S2), which are both functions of the deposited recoil energy and the incident particle type. We present a new precision measurement of the relative scintillation yield L eff and the absolute ionization yield Q y , for nuclear recoils in xenon. A dark matter particle is expected to deposit energy by scattering from a xenon nucleus. Knowledge of L eff is therefore crucial for establishing the energy threshold of the experiment; this in turn determines the sensitivity to particle dark matter. Our L eff measurement is in agreement with recent theoretical predictions above 15 keV nuclear recoil energy, and the energy threshold of the measurement is $4 keV.A knowledge of the ionization yield Q y is necessary to establish the trigger threshold of the experiment. The ionization yield Q y is measured in two ways, both in agreement with previous measurements and with a factor of 10 lower energy threshold.

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Section: Expected Signal In Xenon10mentioning

confidence: 99%

The scintillation and ionization yield of liquid xenon for nuclear recoils

Sørensen

Manzur

Dahl

et al. 2009

Nuclear Instruments and Methods in Physics Research Section A:

104

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“…Such a particle is neutral, non-relativistic, stable, and more generally classified as a Weakly Interacting Massive Particle (WIMP). The open question of the nature of WIMPs is being addressed by numerous direct and indirect detection experiments [5,6,7].Among these, the XENON10 experiment aims to directly detect galactic WIMPs scattering elastically from Xe atoms. Moving with velocities around 10 −3 c, WIMPs can couple to nucleons via both spin-independent and spin-dependent (axial vector) interactions.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

Limits on Spin-Dependent WIMP-Nucleon Cross Sections from the XENON10 Experiment

Angle¹,

Aprile²,

Arneodo³

et al. 2008

Phys. Rev. Lett.

188

160

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XENON10 is an experiment to directly detect weakly interacting massive particle (WIMPs), which may comprise the bulk of the non-baryonic dark matter in our Universe. We report new results for spin-dependent WIMP-nucleon interactions with 129 Xe and 131 Xe from 58.6 live-days of operation at the Laboratori Nazionali del Gran Sasso (LNGS). Based on the non-observation of a WIMP signal in 5.4 kg of fiducial liquid xenon mass, we exclude previously unexplored regions in the theoretically allowed parameter space for neutralinos. We also exclude a heavy Majorana neutrino with a mass in the range of ∼10 GeV/c 2 -2 TeV/c 2 as a dark matter candidate under standard assumptions for its density and distribution in the galactic halo.PACS numbers: 95.35.+d, 29.40.Mc, 95.55.Vj Evidence for a significant cold dark matter component in our universe is stronger than ever [1, 2, 3], a wellmotivated particle candidate being the lightest neutralino from super-symmetric extensions to the Standard Model [4]. Such a particle is neutral, non-relativistic, stable, and more generally classified as a Weakly Interacting Massive Particle (WIMP). The open question of the nature of WIMPs is being addressed by numerous direct and indirect detection experiments [5,6,7].Among these, the XENON10 experiment aims to directly detect galactic WIMPs scattering elastically from Xe atoms. Moving with velocities around 10 −3 c, WIMPs can couple to nucleons via both spin-independent and spin-dependent (axial vector) interactions. Spinindependent WIMP-nucleon couplings are in general smaller than axial vector couplings [4]. However, for low momentum transfer, they benefit from coherence across the nucleus, and therefore the overall event rate for WIMP interactions is expected to be dominated by the spin-independent coupling for target nuclei with A≥30. The sensitivity of XENON10 to spin-independent interactions is published in [8].We report here on a spin-dependent analysis of 58.6 live-days of WIMP-search data, taken in low-background conditions at LNGS, which provides ∼3100 meters water equivalent rock overburden. XENON10 is a dual phase (liquid and gas) xenon time projection chamber, discriminating between the predominantly electron-recoil background and the expected nuclear-recoil WIMP signal via the distinct ratio of ionization to scintillation for each type of interaction [8]. A nuclear recoil energy threshold of 4.5 keV was achieved, and 10 candidate events were recorded for an exposure of about 136 kg days after analysis cuts (the fiducial mass was 5.4 kg). Although all observed events are consistent with expected background from electron recoils (see [8] for details on the analysis and the candidate events), no background subtraction is employed for calculating the WIMP upper limits. In the following analysis, we use identical data quality, fiducial volume, and physics cuts as reported in [8].For axial WIMP-nuclei interactions, the WIMPs couple to the spins of the nucleons. Although the interaction with the nucleus is coherent (as it is in the s...

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Junction array carbon nanotube bolometer

Kozlov

2013

Journal of Applied Physics

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Vertically aligned arrays of multi-walled carbon nanotubes (MWNT forests) irradiated with low-intensity near-infrared laser exhibited bolometric response that became significant with decreasing temperature down from room to about 84 K. High responsivity of 42 V/W with signal bandwidth of about 2600 Hz was observed in the region with a surprisingly small temperature coefficient of resistance. This fact along with peculiar current dependences of material differential photoresistance can be explained by lifting Coulomb blockade in carbon nanotube junctions irradiated with light. A combination of significant bolometric response and nonlinear electrical transport are believed to be characteristic features of the nanostructured junction array system. Investigated material also revealed quite substantial noise with equivalent power of 3 * 10−6 WHz−½ that can be reduced by optimization of nanotube junction network in the forest structure.

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Cryogenic photodetectors

Cited by 3 publications

References 30 publications

The scintillation and ionization yield of liquid xenon for nuclear recoils

The scintillation and ionization yield of liquid xenon for nuclear recoils

Limits on Spin-Dependent WIMP-Nucleon Cross Sections from the XENON10 Experiment

Junction array carbon nanotube bolometer

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