High-Sensitivity and Long-Life Microchannel Plate Processed by Atomic Layer Deposition

Cao, Weiwei; Zhu, Bingli; X, Bai; Xu, Peng; Wang, Bo; Qin, Junjun; Gou, Yongsheng; Fang, Lei; Liu, Baiyu; Jie, Guo; Zhu, Jingtao; Bai, Yonglin

doi:10.1186/s11671-019-2983-1

Cited by 11 publications

(11 citation statements)

References 27 publications

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“…5 a, we design the AZO conductive layer of AZO-MCP by using the WYM operation and temperature adjustment based on the working resistance. We use atomic layer deposition technology to grow the emission layer on microchannel wall of the two-dimensional pore arrays [ 3 , 11 , 22 ]. In Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The material is deposited on the substrate in the form of a monoatomic film surface. ALD can produce a continuous film without pinholes, with excellent coverage, and can control the thickness and composition of the atomic film [ 1 , 2 , 4 , 11 , 13 , 19 , 20 ].…”

Section: Experimental and Methodsmentioning

confidence: 99%

“…The usual process of hydrogen firing in the preparation of a microchannel has a lot of shortcomings: first, the hydrogen firing process cannot independently adjust the conductive layer and the emission layer [ 10 , 11 ]; second, the heavy metal elements (Pb, Bi) lead to environmental pollution in the lead glass smelting process; third, large areas of MCP will become warped due to the high temperature [ 8 ]; fourth, lead glass being used hydrogen reduction reaction contains K, Rb and other radioactive elements resulting in background noise [ 8 ]; last, hydrogen which residues in the pores become ions due to bias voltage and they will fly in the opposite direction of electron to destroy the cathode of instrument [ 8 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

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The Design of the AZO Conductive Layer on Microchannel Plate

et al. 2021

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When the resistivity of the AZO conductive layer is within the MCP resistance requirement, the interval of the Zn content is very narrow (70–73%) and difficult to control. Aiming at the characteristics of the AZO conductive layer on the microchannel plate, an algorithm is designed to adjust the ratio of the conductive material ZnO and the high resistance material Al2O3. We put forward the concept of the working resistance of the MCP (i.e., the resistance during the electron avalanche in the microchannel). The working resistance of AZO-ALD-MCP (Al2O3/ZnO atomic layer deposition microchannel plate) was measured for the first time by the MCP resistance test system. In comparison with the conventional MCP, we found that the resistance of AZO-ALD-MCP in working state and non-working state is very different, and as the voltage increases, the working resistance significantly decreases. Therefore, we proposed a set of analytical methods for the conductive layer. We also proposed to adjust the ratio of the conductive material of the ALD-MCP conductive layer to the high-resistance material under the working resistance condition, and successfully prepared high-gain AZO-ALD-MCP. This design opens the way for finding better materials for the conductive layer of ALD-MCP to improve the performance of MCP.

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Section: Resultsmentioning

confidence: 99%

Section: Experimental and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Design of the AZO Conductive Layer on Microchannel Plate

et al. 2021

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“…In the measurements of Allgood et al, the measurements of C 16 and C 18 n -alkanes, 1-phenyl decane and two large ethoxylated alcohols appear to have similar deviations. The measurements of PAH compounds (except biphenyl and anthracene) and phenyl cyclohexane might be affected by the gain factors , as their EICS are measured preparing or purchasing calibration mixture of multiple compounds. However, no other references are obtained to cross-check these measurements.…”

Section: Resultsmentioning

confidence: 99%

Predicting Total Electron-Ionization Cross Sections and GC–MS Calibration Factors Using Machine Learning

Bose

Westmoreland

2020

J. Phys. Chem. A

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Concentrations in GC–MS using electron-ionization mass spectrometry can be determined without pure calibration standards through prediction of relative total-ionization cross sections. An atom- and group-based artificial neural network (FF-NN-AG) model is created to generate EI cross sections and calibrations for organic compounds. This model is easy to implement and is more accurate than the widely used atom-additivity-based correlation of Fitch and Sauter (Anal. Chem. 1983). Ninety-two new measurements of experimental EI cross sections (70–75 eV) are joined with different interlaboratory datasets, creating a 396-compound cross-section database, the largest to date. The FF-NN-AG model uses 16 atom-type descriptors, 79 structural-group descriptors, and one hidden layer of 10 nodes, trained 500 times. In each cycle, 96% of the compounds in this database are freshly chosen at random, and then the model is tested with the remaining 4%. The resulting r 2 is 0.992 versus 0.904 for the Fitch and Sauter correlation, root mean square deviation is 2.8 versus 9.2, and maximum relative error is 0.30 versus 0.73. As an example of the model’s use, a list of cross sections is generated for various sugars and anhydrosugars.

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“…On the basis, this paper proposed that setting a micro arrayholes waveguide gate between both MCPs to collect coupling loss for self-trigger or other complex detecting [30]- [32]. As shown in Fig.…”

Section: Figure 2 Electron Beam Diffusion In Coupling Processmentioning

confidence: 99%

Optimization Design of Self-Triggered Complex Detector for Space Range-Gated Imaging System

Tang

Ibrahim

et al. 2020

IEEE Access

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To further enhance transient characteristics of space range-gated imaging system and widen its application potential in astronomical and military domains, a self-triggered structure and complex detecting mechanism are proposed in this paper. There being delays restriction among multiple subsystem of rangegated imaging system and the robust performance of multiple optical axis adjusted are firstly discussed and analyzed. Based on these, by researching the work principle and coupling process of microchannel plates in series in image intensifier, taking advantages of the coupling loss electrons to realize self-triggered is studied and its prototype device structure is further proposed too. Then, the space optical transfer theory of new selftriggered component is deduced and its waveguide process is stimulate in the software. Finally, the selftrigger performance and optical transfer effect of cutting edge invention is verified by vacuum test. And the test results basically match with theoretical model and simulation data. INDEX TERMS Micro channel Plate (MCP), Range-gated imaging, Self-triggered, Complex detector.

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High-Sensitivity and Long-Life Microchannel Plate Processed by Atomic Layer Deposition

Cited by 11 publications

References 27 publications

The Design of the AZO Conductive Layer on Microchannel Plate

The Design of the AZO Conductive Layer on Microchannel Plate

Predicting Total Electron-Ionization Cross Sections and GC–MS Calibration Factors Using Machine Learning

Optimization Design of Self-Triggered Complex Detector for Space Range-Gated Imaging System

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