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Showing 1 to 18 of 18 for “"Scintillator detector"”.
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3D Scintillator Detector Quenching Characterization For Scanning Proton Beams
… assurance measurements leading to sophisticated detector setups and time consuming measurements. Fast 3D measurements are therefore desirable to verify the complex dose distribution and to enable the utilization of the full potential of proton therapy. The overall objective of this project is to …
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A measurement of the mean life of the positive muon to a precision of 11 parts per million
… ferromagnetic target, which was surrounded by a scintillator detector array. The result, τμ = 2.197 013 (24) μs, is in excellent agreement with the previous world average. The new world average τμ = 2.197019(21) μs determines the Fermi constant GF = 1.166371(6) × 10^-5 GeV^-2 (5 ppm). Described …
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A search for slow, lightly ionizing particles in cosmic rays
… search was made using a small-area four-layer scintillator detector. Slow lightly ionizing particles created in cosmic ray interactions in the atmosphere which arrived within 13 ms of the shower front were searched for. In a live time of 2.55 x 10⁵ s 394,608 showers of two or more muons and …
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A radiotracer technique for in situ adsorbate measurements on smooth electrode surfaces
… by pressing the electrode against a glass scintillator detector at the bottom of an electrochemical cell. Equations which account for the backscattering factor have been developed to calculate the surface packing density, $\Gamma$, of the adsorbate. Under current optimum conditions (when …
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Measurement of fluence at the D-line fast neutron facility at iThemba LABS
… of iThemba LABS, using an NE213 organic liquid scintillator detector and a 238U fission ionisation chamber. Neutron beams were produced by irradiating a 6 mm natural lithium target with pulsed proton beams obtained from the k = 200 separated sector cyclotron. Three incident proton beam energies …
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Study of LaBr3 (Ce) detector response to high energy helium ions
… radiation detection devices. Lanthanum Bromide scintillator detector (LaBe3: Ce) has been successfully used as a gamma spectrometer inside space crafts. However, data on its response to other particles such as charged particles remains limited. From a radiation protection perspective, it is …
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Measuring the ⁷Be Neutrino Flux From the Sun: Calibration of the Borexino Solar Neutrino Detector
The Borexino solar neutrino detector is a real-time liquid scintillator detector designed to measure sub-MeV neutrinos. With its unprecedented level of radio-purity, Borexino is poised to provide the most precise measurements to-date of solar neutrino and geo-antineutrino fluxes. However, in order …
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Searching for Reactor Antineutrino Flavor Oscillations with the Double Chooz Far Detector
… flavor oscillations using the Double Chooz Far Detector. The search was performed by observing the rate and energy spectrum of antineutrinoₑ interacting via Inverse Beta Decay in a Gd-doped liquid scintillator detector, and comparing the observation to an expectation based on a prediction of the …
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Characterization of single-sided cadmium zinc telluride strip detectors for high energy astrophysics applications
… as a new room temperature semiconductor detector due to its good energy resolution, high atomic number, high density and good stopping power in the early 1990s. UNH has focused on developing CZT strip detector designs for astrophysical measurement applications in the 0.05 to 1 MeV photon …
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A novel detection system using neutron/gamma pulse shape discrimination, for use in active interrogation environments
… a complex and challenging radiation field for detectors to operate in. This research was aimed at improving active interrogation techniques further by optimising experimental setups and procedures and reducing undesirable dead periods of acquisition which may be observed. The important outcomes …
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Internal Radioactive Source Calibration of the Borexino Solar Neutrino Experiment
… production in the Sun. Borexino is a liquid scintillator detector that will measure the neutrino energy spectrum to the lowest energy threshold to date. It has been designed to measure the flux of the mono-energetic neutrinos produced by electron capture on 7Be in the Sun's core, which will …
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Phenomenology of a Low-Energy Neutrino Factory and Related Experiments
… of this setup with a 100 kiloton liquid argon detector and comparing its performance to that of a 50 kiloton liquid scintillator detector and a 440 kiloton water Cerenkov detector. The liquid argon and liquid scintillator detectors are found to perform best, providing sensitivity to theta_{13}, …
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Detection of Antineutrinos at the North Anna Nuclear Generating Station
… hypothesis unambiguously. The second prototype detector, MiniCHANDLER, was deployed 25 meters from a $2.9~GW_{th}$ commercial nuclear reactor in North Anna, Virginia. To fight against the overwhelming background arising from its surface-level deployment, CHANDLER detectors adopt a novel design …
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PURIFICATION AND CHARACTERIZATION OF THE JUNO LIQUID SCINTILLATOR: FIRST RADIOPURITY RESULTS
… Observatory) is the largest organic liquid scintillator detector ever built. It exploits 20000 tons of organic liquid scintillator contained in a huge Acrylic Vessel (d = 35 m), detecting neutrinos and anti-neutrinos from natural sources and Nuclear Power Plants. The experiment construction …
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Characterisation and calibration of silicon photomultipliers for next-generation space detectors
… are the fundamental driving factors for sending detectors to space [1]. Apart from employing high-performance SiPMs, it is also important to achieve a convenient trade-off between fast signal processing, good signal amplification, and low noise in order to obtain highquality scientific data. HERD …
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Radon Detection and 241Am-7Li Source Development for the Lux-Zeplin Dark Matter Experiment
… WIMPs are theorized to interact with certain detector materials such as liquid xenon (LXe), via the weak force, active on all other known particles, and produce nuclear recoil (NR). However, this detection scheme meets several challenges. Firstly, the LXe must be sufficiently purified of …
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Innovative Methods for LEO Particle Experiments]{Innovative Methods and Instrumentation for Low-Energy Particle Experiments in Low-Earth Orbit Space Mission Analysis and Hardware R&D across the NUSES, CSES-Limadou and SPaRKLE Projects
… to navigate this challenge, accurate virtual detector models built with the Geant4 Monte Carlo toolkit, trigger strategy simulations, and figure-of-merit frameworks for cross-instrument comparison, have been applied to three missions, which form the core case studies of this thesis. The Low …