Neutron/-ray digital pulse shape discrimination with organic scintillators

Kaschuck, Yu. A.; Esposito, B.

doi:10.1016/j.nima.2005.05.071

Cited by 86 publications

(41 citation statements)

References 9 publications

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“…One of the most effective digital PSD methods is to bin the integrals of the total pulse and of the tail pulse in a two-dimensional histogram, which will show separate neutron and gamma distributions [74]. To evaluate PSD capabilities of the EJ301-PMT detector, the detector was exposed to a 24 1Anmericium-Berylliumn (AmBe) source.…”

Section: Pulse Shape Discrimination (Psd)mentioning

confidence: 99%

An in situ accelerator-based diagnostic for plasma-material interactions science on magnetic fusion devices

Hartwig

Barnard

Lanza

et al. 2013

Review of Scientific Instruments

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Plasma-material interactions (PMI) in magnetic fusion devices such as fuel retention, material erosion and redeposition, and material mixing present significant scientific and engineering challenges, particularly for the next generation of devices that will move towards reactor-relevant conditions. Achieving an integrated understanding of PMI, however, is severely hindered by a dearth of in-situ diagnosis of the plasma-facing component (PFC) surfaces. To address this critical need, this thesis presents an accelerator-based diagnostic that nondestructively measures the evolution of PFC surfaces in-situ. The diagnostic aims to remotely generate isotopic concentration maps that cover a large fraction of the PFC surfaces on a plasma shot-to-shot timescale.The diagnostic uses a compact, high-current radio-frequency quadrupole accelerator to inject 0.9 MeV deuterons into the Alcator C-Mod tokamak. The tokamak magnetic fields in between plasma shots are used to steer the deuterons to PFCs where the deuterons cause high-Q nuclear reactions with low-Z isotopes ~5 pim into the material. Scintillation detectors measure the induced neutrons and gammas; energy spectra analysis provides quantitative reconstruction of surface concentrations. An overview of the diagnostic technique, known as accelerator-based in-situ materials surveillance (AIMS), and the first AIMS diagnostic on the Alcator C-Mod is given; a description of the complementary simulation tools is also provided. Experimental validation is shown to demonstrate the optimized beam injection into the tokamak, the quantification of PFC surfaces isotopes, and the measurement localization provided by magnetic beam steering. Finally, the first AIMS measurements of fusion fuel retention are presented, demonstrating the local erosion and codeposition of deuterium-saturated boron surface filns. The finding confirms that deuterium codeposition with boron is insufficient to account for the net fuel retention in Alcator C-Mod.

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Section: Pulse Shape Discrimination (Psd)mentioning

confidence: 99%

An in situ accelerator-based diagnostic for plasma-material interactions science on magnetic fusion devices

Hartwig

Barnard

Lanza

et al. 2013

Review of Scientific Instruments

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“…For example, for very fast timing applications, it has been shown that digital algorithms for BaF 2 scintillators, using a 1 GS/s sampling ADC, can give a timing performance that is better than that obtained with traditional analog systems [14]. Besides achieving the best possible timing resolution, digital systems have been widely employed for PSA to perform neutron-γ discrimination with organic scintillators [15], using the zero-crossing [16] and double integration methods [17,18]. Specifically for the BC501A scintillator, digital neutron-γ discrimination has been widely exploited [19][20][21][22] and it has been shown that for PSA purposes a digitizer with a sampling rate of 200 MS/s and a resolution of 14 bits is suitable [20].…”

Section: Nuclear Instruments and Methods Inmentioning

confidence: 99%

Digital pulse-timing technique for the neutron detector array NEDA

Modamio

Valiente-Dobón

Jaworski

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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“…According to a commonly accepted mechanism [15,16], the slow component Major developments in understanding these properties have been made with transstilbene single crystals, an efficient PSD material used for decades as a standard for comparison with other solid and liquid organic scintillators. Recent availability of high-speed waveform digitizers greatly simplified processing of gamma-neutron signals [17][18][19], enabling us to conduct much broader studies of many new materials, among which 3-PB was one of the first crystals [20] with the PSD properties that could be potentially used in neutron detection.…”

Section: Neutron Detection Propertiesmentioning

confidence: 99%

Application of solution techniques for rapid growth of organic crystals

Zaitseva¹,

Carman²,

Glenn³

et al. 2011

Journal of Crystal Growth

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Single crystals of a pure hydrocarbon, 1,3,5-triphenylbenzene, with properties suitable for high-energy neutron detection were grown from toluene solutions using slow evaporation and temperature reduction methods with growth rates up to 10 mm/day. Application of the rapid growth technique developed earlier for growth of large water-soluble crystals shows that crystals of aromatic compounds can be successfully grown from solutions in large volumes required for their application as scintillator materials for radiation detection.

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Neutron/-ray digital pulse shape discrimination with organic scintillators

Cited by 86 publications

References 9 publications

An in situ accelerator-based diagnostic for plasma-material interactions science on magnetic fusion devices

An in situ accelerator-based diagnostic for plasma-material interactions science on magnetic fusion devices

Digital pulse-timing technique for the neutron detector array NEDA

Application of solution techniques for rapid growth of organic crystals

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