Energy-resolved fast neutron resonance radiography at CSNS

Tan, Zhixin; Tang, Jingyu; Jing, Hantao; Fan, Ruirui; Li, Qiang; Ning, Changjun; Bao, Jie; Ruan, Xichao; Luan, Guangyuan; Cao, Feng; Zhang, Xianpeng

doi:10.1016/j.nima.2018.01.099

Cited by 15 publications

(10 citation statements)

References 28 publications

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“…The Back‐n energy spectrum and the neutron fluxes of different energy intervals at CSNS can be found in Figure S9 and Table S1, Supporting Information, respectively. [ 46,47 ] The neutrons used in all experiments described within this section were fast neutrons with energies greater than 0.5 MeV, and they were selected by the time‐of‐flight.…”

Section: Resultsmentioning

confidence: 99%

Synergy of Organic and Inorganic Sites in 2D Perovskite for Fast Neutron and X‐Ray Imaging

Shao

et al. 2023

Adv Funct Materials

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Fast neutron and X‐ray imaging are considered complementary nondestructive detection technologies. However, due to their opposite cross‐sections, development of a scintillator that is sensitive to both fast neutrons and X‐rays within a single‐material framework remains challenging. Herein, an organic–inorganic hybrid perovskite (C4H9NH3)2PbBr4 (BPB) is demonstrated as a scintillator that fully meets the requirements for both fast neutron and X‐ray detection. The hydrogen‐rich organic component acts as a fast neutron converter and produces detectable recoil protons. The heavy atom‐rich inorganic fraction efficiently deposits the energy of charged recoil protons and directly provides a large X‐ray cross‐section. Due to the synergy of these organic and inorganic components, the BPB scintillator exhibits high light yields (86% of the brightness of a commercial ZnS (Ag)/6LiF scintillator for fast neutrons; 22 000 photons per MeV for X‐rays) and fast response times (τdecay = 10.3 ns). More importantly, energy‐selective fast neutron and X‐ray imaging are also demonstrated, with high resolutions of ≈1 lp mm−1 for fast neutrons and 17.3 lp mm−1 for X‐rays; these are among the highest resolution levels for 2D perovskite scintillators. This study highlights the potential of 2D perovskite materials for use in combined fast neutron and X‐ray imaging applications.

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Section: Resultsmentioning

confidence: 99%

Synergy of Organic and Inorganic Sites in 2D Perovskite for Fast Neutron and X‐Ray Imaging

Shao

et al. 2023

Adv Funct Materials

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“…For better resolution, usually a thinner scintillator is desirable as it can produce light emission with a smaller point spread function, but this will be at the expense of detection efficiency so a tradeoff is necessary. Energyselective imaging via time-of-flight (TOF) measurements [5] is even possible with spallation sources, which emit pulses of neutrons, in which case the energy resolution is mainly determined by the pulse width of the neutrons and the time response of the detector. When better energy resolution is required, the integration time of the detector must be shorter, which requires higher neutron flux.…”

Section: Introductionmentioning

confidence: 99%

Single-pixel imaging with neutrons

Huang

Zeng

et al. 2021

Science Bulletin

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Neutron imaging is an invaluable tool for noninvasive analysis in many fields. However, neutron facilities are expensive and inconvenient to access, while portable sources are not strong enough to form even a static image within an acceptable time frame using traditional neutron imaging. Here we demonstrate a new scheme for single-pixel neutron imaging of real objects, with spatial and spectral resolutions of 100 lm and 0.4% at 1 Å, respectively. Low illumination down to 1000 neutron counts per frame pattern was achieved. The experimental setup is simple, inexpensive, and especially suitable for low intensity portable sources, which should greatly benefit applications in biology, material science, and industry.

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“…T HE CSNS is a large scientific device that generates neutrons by hitting the target with high-energy protons. The proton beam impinges the target at 25Hz and produces high flux neutrons [1]. A facility called "Back-n WNS" in CSNS exploits the application of back-streaming neutrons which have a very wide energy spectrum from eV to hundreds of MeV [2][3] [4].…”

Section: Introductionmentioning

confidence: 99%

“…1 Due to the neutron beam in Back-n beam line has high flux and wide energy spectrum, we can use it easily to complete neutron resonance radiography. For this idea, if we want to have a good image, the energy of neutrons should be measured to get the transmission information of them [1]. A proper method to acquire the energy is to measure the flight time when neutrons travel from the target to the detector.…”

Section: Introductionmentioning

confidence: 99%

“…In this experiment, the energy of neutrons we are focus on is from 0.5MeV to 10MeV for that they are the majority of the beam line and have not been touched by other neutron spallation source [1]. In order to make the energy resolution better than 1% when the energy of neutron is 10MeV, we should control the time measurement precision better than about 9ns when the travelling distance L is 77.5m.…”

Section: Introductionmentioning

confidence: 99%

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Development of a 256-channel Time-of-flight Electronics System For Neutron Beam Profiling

Chen,

Feng,

et al. 2018

Preprint

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A 256-channel time-of-flight (TOF) electronics system has been developed for a beam line facility called "Back-n WNS" in China Spallation Neutron Source (CSNS). This paper shows the structure and performance of electronics system and the test results in CSNS.A 256-channel photomultiplier tube (PMT) is chosen as the detector in this system. In order to acquire the time information from the PMT, an electronics system has been designed. The electronics system mainly includes one front-end board (FEB), four time-to-digital converter (TDC) boards and one clock distribution module (CDM). There are 256 channels on FEB and 64 channels on each TDC board. The FEB is connected to the PMT with high-density connectors and the TDC boards are connected to the FEB through 2m cables. The TDC boards are 6U size so that they can be PCI extensions for Instrumentation (PXI) cards. Data from TDC boards can be transferred to the PXI control card through the backboard. In order to make four TDC boards work synchronously, a CDM outputs four clock signals to TDC boards which are distributed from one clock source. The TDC boards achieve a timing resolution of 3.5ns by test with a signal generator. The TOF measurement system has been used in CSNS.

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Energy-resolved fast neutron resonance radiography at CSNS

Cited by 15 publications

References 28 publications

Synergy of Organic and Inorganic Sites in 2D Perovskite for Fast Neutron and X‐Ray Imaging

Synergy of Organic and Inorganic Sites in 2D Perovskite for Fast Neutron and X‐Ray Imaging

Single-pixel imaging with neutrons

Development of a 256-channel Time-of-flight Electronics System For Neutron Beam Profiling

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