The New Cold Neutron Radiography Facility (CNRF) at the Mianyang Research Reactor of the China Academy of Engineering Physics

Tang, Bin; Huo, Heyong; Ke, Tang; Rogers, John D.; Haste, Martin J.; Christodoulou, Marios

doi:10.1016/j.phpro.2015.07.004

Cited by 12 publications

(4 citation statements)

References 1 publication

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“…The fluorescence decay of GOS:Tb, F was recorded with an ultra-fast lifetime Spectrofluorometer (DeltaFlex, Paris, France). The cold neutron tests [ 12 ] were carried out at the China Mianyang Research Reactor (CMRR). The conditions for the cold neutron source were as follows: the flux was about 5·10 6 n/s/cm 2 , and the neutron wavelength was about 0.28 nm [ 39 ].…”

Section: Methodsmentioning

confidence: 99%

“…The spatial resolutions were 2.5 mm and 1.5 mm for the SIT and CCD camera methods, respectively, while the resolution was 1 mm when using an imaging plate. Bin [ 12 ] and Huo [ 13 ] reported the performance of the cold neutron radiography beamline, in which a spatial resolution of about 20 μm was obtained when utilizing a Tb-doped Gd 2 O 2 S (GOS) screen with a thickness of 10 μm. Jiang [ 14 ] developed a detector prototype; the resolution of the GOS scintillation can be evaluated using neutron beam tests, and a spatial resolution of 36 μm (28 lp/mm) could be measured.…”

Section: Introductionmentioning

confidence: 99%

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High Quantum Efficiency Rare-Earth-Doped Gd2O2S:Tb, F Scintillators for Cold Neutron Imaging

et al. 2023

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High-resolution neutron radiography provides novel and stirring opportunities to investigate the structures of light elements encased by heavy elements. For this study, a series of Gd2O2S:Tb, F particles were prepared using a high-temperature solid phase method and then used as a scintillation screen. Upon reaching 293 nm excitation, a bright green emission originated from the Tb3+ luminescence center. The level of F doping affected the fluorescence intensity. When the F doping level was 8 mol%, the fluorescence intensity was at its highest. The absolute quantum yield of the synthesized particles reached as high as 77.21%. Gd2O2S:Tb, F particles were applied to the scintillation screen, showing a resolution on the neutron radiograph as high as 12 μm. These results suggest that the highly efficient Gd2O2S:Tb, F particles are promising scintillators for the purposes of cold neutron radiography.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High Quantum Efficiency Rare-Earth-Doped Gd2O2S:Tb, F Scintillators for Cold Neutron Imaging

et al. 2023

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“…There are eight neutron scattering facilities at the CMRR: four of them take advantages of thermal neutrons and are in the reactor hall, e.g., High Resolution Neutron Diffractometer, Residual Stress Neutron Diffractometer [11], Thermal Neutron Radiography, and High Pressure Neutron Diffractometer, while other four take advantages of cold neutrons and are in the cold neutron scattering hall, e.g., Cold-neutron Triple Axis Spectrometer, Cold Neutron Radiography [12], Small Angle Neutron Spectrometer [13,14] and Time-of-flight Polarized Neutron Reflectometer [15]. The layout of all the neutron scattering facilities [15] is shown in figure 1.…”

Section: Instrument Descriptionmentioning

confidence: 99%

High resolution neutron diffractometer HRND at research reactor CMRR

et al. 2018

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The high resolution neutron diffractometer HRND is located at the 20 MW China Mianyang Research Reactor (CMRR), which is a neutron powder diffractometer especially dedicated to crystal and magnetic structure studies for polycrystalline powder samples. A vertical focusing Ge (511) monochromator produce a monochromatic neutron beam with a wavelength of 1.885 Å at a fixed take-off angle of 120̂. An array of 64 equidistant 3He filled proportional counters can acquire diffraction patterns with a large-scale diffraction angle range over 160̂. As all the Soller slit collimators of HRND have a collimation angle of 10′ and the monochromator has an average mosaicity of 0.359̂, HRND obtains a best resolution of about 1.6\textperthousand based on experiments, which makes the resolution of HRND can compete with the mainstream-level high resolution neutron powder diffractometers in the world. Equipped with a cryostat and a furnace, HRND allows structural characterization in an extremely broad temperature range. The details of the configuration and performance of the instrument are reported along with its specifications and performance assessments in the present paper.

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“…1 High resolution neutron diffractometer (HRND) Xuanwu, 2 residual stress neutron diffractometer (RSND) Qilin, 3 thermal neutron radiography station (TNR), 4 and high-pressure neutron diffractometer (HPND) Fenghuang, 5 are installed in the reactor hall. Small-angle neutron scattering (SANS) Suanni, [6][7][8] time-of-flight and polarized neutron reflectometer (TPNR) Diting, 9 cold neutron triple-axis spectrometer (CTAS) Kunpeng, 10 and cold neutron radiography facility (CNRF) 11 are installed in the cold neutron scattering hall. Moreover, some spectrometers are under construction, such as ultra-small-angle neutron scattering (USANS), spin echo spectrometers, 12 thermal neutron triple-axis spectrometer, polarized SANS (PSANS), and so on.…”

Section: Introductionmentioning

confidence: 99%

MyNeutronDAQ: A general program for data acquisition of neutron scattering spectrometers at China Mianyang Research Reactor and on‐line data‐analysis

Wang

Pang

et al. 2020

Softw Pract Exp

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MyNeutronDAQ, a graphical user interface (GUI) program for data acquisition of neutron scattering spectrometers at China Mianyang Research Reactor (CMRR) and on‐line data‐analysis has been developed. The program is written in Microsoft Visual C++, which runs under Windows operating systems. Based on the characters of the hardware connection and time‐to‐digital converter (TDC) systems of the spectrometers (taking the time‐of‐flight and polarized neutron reflectometer [TPNR] Diting as the example), a valid event identification and screening protocol is embedded into the program. Moreover, the program design and key features of MyNeutronDAQ such as visualization interface, optional output data format, batch mode, and functions of user‐friendly on‐line analysis, are presented. Taking the program specifically for small‐angle neutron scattering (SANS) Suanni as the example, specific applications of the MyNeutronDAQ are further presented.

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The New Cold Neutron Radiography Facility (CNRF) at the Mianyang Research Reactor of the China Academy of Engineering Physics

Cited by 12 publications

References 1 publication

High Quantum Efficiency Rare-Earth-Doped Gd2O2S:Tb, F Scintillators for Cold Neutron Imaging

High Quantum Efficiency Rare-Earth-Doped Gd2O2S:Tb, F Scintillators for Cold Neutron Imaging

High resolution neutron diffractometer HRND at research reactor CMRR

MyNeutronDAQ: A general program for data acquisition of neutron scattering spectrometers at China Mianyang Research Reactor and on‐line data‐analysis

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