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Instrumentation and Detectors

Instrumentation and Detectors for research in natural science, including optical, molecular, atomic, nuclear and particle physics instrumentation and the associated electronics, services, infrastructure and control equipment.

Papers reviewed in the last 7 days lead, then the papers readers actually read. Ranking is not a quality score.

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Cryogenic S-parameters at 45 mK now come with an uncertainty budget

At 6 GHz, a 20 dB attenuator reads 20.70 ± 0.08 dB, so quantum-circuit engineers can trust cryogenic metrology.

· “Full Two-Port S-Parameters at mK Temperatures: a Calibration Strategy and Uncertainty Budget”

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Figure from the paper

Neutron capture gives sapphire a 1.1 keV calibration peak

Thermal neutron capture on 27Al leaves a 1113.6 eV recoil line, a source-free calibration for low-energy detectors.

· “Observation of a low energy nuclear recoil peak in the neutron calibration data of an Al₂O₃ crystal in CRESST-III”

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Figure from the paper

THz detector array validates 54% aperture efficiency

Lens-coupled KIDs reach background-limited noise of 8e-20 W/√Hz, key for cooled space telescopes.

· “Lens based Kinetic Inductance Detectors with Distributed Dual Polarised Absorbers for Far Infra-red Space-based Astronomy”

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Figure from the paper

Curved silicon sensors cut FCC-ee vertex detector material by 3x

Thinner inner layers improve impact-parameter resolution, opening rare B-decay measurements at the proposed collider.

· “Design, performance and future prospects of vertex detectors at the FCC-ee”

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Figure from the paper

Neural net sorts Hoyle decay branches with F1 up to 0.87

Training on simulated 2D track images, the net separates rare 12C decays from scattering backgrounds in a planned TPC.

· “Classification of Hoyle State Decay Branches in Active Target Time Projection Chamber using Neural Network”

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CNN autoencoder locates calorimeter photon hits to under 1 cm

A label-trained network also reads photon energies with a mean bias of 3 MeV, a step toward full single-network event reconstruction.

· “Cluster Reconstruction in Electromagnetic Calorimeters Using Machine Learning Methods”

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Figure from the paper

Tiny diamond detector rivals 3He neutron counting per area

A 1.4 cm2 diamond-powder prototype runs at about 1.2 times the per-area efficiency of a 576 cm2 3He detector, and ignores gammas.

· “Scintillation Light Detection in Polycrystalline Diamond Using Single Photon Detectors”

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FFT-based neural classifier keeps neutron/gamma accuracy at low rates

Charge-normalized FFT spectra push adversarial ROC AUC to 0.999 at 10 MS/s, where the fixed index falls to 0.751.

· “Towards energy-insensitive and robust neutron/gamma classification: A learning-based frequency-domain parametric approach”

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Figure from the paper

Single-photon detector chip reaches 72.5% fill factor

Daisy-chained chips form ~70%-fill-factor planes for liquid noble gas experiments with 10-ns photon timing.

· “Design of a Large Area Digital SiPM with High Fill Factor and Fully Serial Digital Readout for Single Photon Detection in Liquid Noble Gas Detectors”

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Weapon-grade 1966 plutonium dominates Palomares seafloor core

Plutonium isotope ratios put roughly 84% of the core's plutonium activity on the 1966 accident.

· “Characterisation of the plutonium isotopic composition of a sediment core from Palomares, Spain, by low-energy AMS and alpha-spectrometry”

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Figure from the paper

TEVA resin swap validated for plutonium in the environment

Purified fractions match the older anion-exchange method in both AMS and alpha spectrometry.

· “Isolation of Pu-isotopes from environmental samples using ion chromatography for accelerator mass spectrometry and alpha spectrometry”

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Figure from the paper

New factories pass HL-LHC detector certification at 97% efficiency

Small 1 mm gap prototypes held >96.5% efficiency under HL-LHC background; full-size volumes passed factory checks.

· “New Facilities for the Production of 1 mm gap Resistive Plate Chambers for the Upgrade of the ATLAS Muon Spectrometer”

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Figure from the paper

Three accidental fast discharges validate CMS yoke field to 3%

Eddy-current corrections from 2023 events bring 2006 flux-loop data in line with the 3D magnet model.

· “Analysis of Measurements of the Magnetic Flux Density in Steel Blocks of the Compact Muon Solenoid Magnet Yoke with Solenoid Coil Fast Discharges”

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Figure from the paper

At new reactor site, neutron flux is 30x higher, gamma flux 26x lower

Reactor-correlated background stays negligible; the main residual is simulated cosmic-ray cascade neutrons.

· “Background characterization of the CONUS+ experimental location”

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Figure from the paper

Airborne gamma imaging maps spread-out sources within 15 percent

UAS surveys of eight Cu-64 surrogate sources reconstruct their shapes and total activity with errors near 15 percent.

· “Surrogate distributed radiological sources III: quantitative distributed source reconstructions”

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Figure from the paper

Microcavity lock hits 0.5 pm while lock light leaks 100-fold less

Odd-order spatial-mode locking keeps open microcavities stable without blinding the fluorescence detector.

· “Micro-cavity length stabilization for fluorescence enhancement using schemes based on higher order spatial modes”

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Figure from the paper

Glyoxal sensor reaches 10 ppt

A rotating filter and photomultiplier track ambient and biomass-burning glyoxal at a fraction of spectrograph cost.

· “Broadband Cavity-Enhanced Absorption Spectroscopy (BBCEAS) Coupled with an Interferometer for On-Band and Off-Band Detection of Glyoxal”

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Figure from the paper

Timepix4 clustering boosts electron-image resolution 2-3x

ToT-weighted centroids lift MTF at Nyquist from 0.16 to 0.34 at 100 keV and 0.0046 to 0.014 at 200 keV.

· “Measurement of the Resolution of the Timepix4 Detector for 100 keV and 200 keV Electrons for Transmission Electron Microscopy”

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Figure from the paper

Deep learning lifts electron-neutrino purity to 61.5%

On simulated IWCD data, ResNet-18 lifts purity and efficiency, 61.5% and 78.2% vs 51.1% and 69.5%.

· “Likelihood and Deep Learning Analysis of the electron neutrino event sample at Intermediate Water Cherenkov Detector (IWCD) of the Hyper-Kamiokande experiment”

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Figure from the paper

This paper describes the construction and first operation of a 2.6 metre tall liquid…

Xenoscope's 2.6 m tall xenon TPC was commissioned and detected correlated light and charge signals from cosmic muons near the top of the…

· “Commissioning of the 2.6 m tall two-phase xenon time projection chamber of Xenoscope”

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Scintillator array lowers cosmic-ray trigger to 150 TeV

Simulation says the 256-panel surface layer also gives sub-degree pointing above PeV and a proton-iron separation FOM above 1.3.

· “Simulation and Reconstruction Study of a Future Surface Scintillator Array at the IceCube Neutrino Observatory”

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Figure from the paper

65 of 83 Compton-imaging papers report one operating point

The field reports values where transfer requires gradients; deployment lands where incumbents can't reach the task.

· “Real-Time Requirements and Transferability in Compton Imaging: From the Detector Chain to the Application”

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Figure from the paper

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