Temporal resolution limit estimation of x-ray streak cameras using a CsI photocathode

Li, Xiang; Gu, Lijun; Zong, Fangke; Jing-jin, Zhang; Yang, Qing

doi:10.1063/1.4928675

Cited by 2 publications

(2 citation statements)

References 21 publications

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“…However, certain problems can occur in practice. For example, it is difficult to deconstruct the offset of a streak on the CCD into time and space dimensions because of the diffusion of the optical imaging system and electronic imaging system [16,17], non-parallelism between the direction of the sweep electric field and the direction of time-resolved channels, the installation angle difference of the CCD and streak tube, and other factors.…”

Section: Introductionmentioning

confidence: 99%

“…diffusion of the optical imaging system and electronic imaging system [16,17], non-paral lelism between the direction of the sweep electric field and the direction of time-resolved channels, the installation angle difference of the CCD and streak tube, and other factors. Thus, improving the temporal and spatial resolution of streak tubes has remained a topic of concern to researchers [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

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A Calibration Method for Time Dimension and Space Dimension of Streak Tube Imaging Lidar

Chen,

Shao,

Fan

et al. 2023

Applied Sciences

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Owing to the special working systems of streak tube imaging lidar (STIL), the time and space dimensions are coupled together on the streak images. This coupling can cause measurement errors in 3D point clouds and can make measurement results more complicated to calibrate than other kinds of lidars. This paper presents a method to generate a time calibration array and an angle calibration array to separate the offset of the streak into time dimension and space dimension. The time and space information of the signal at any position on the streak image can be indexed through these two arrays. A validation experiment on aircraft was carried out, and the range error of the 3D point cloud was improved from 0.41 m to 0.27 m using the proposed calibration method. Thus, using the proposed calibration method can improve the accuracy of the point cloud produced by STIL.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Calibration Method for Time Dimension and Space Dimension of Streak Tube Imaging Lidar

Chen,

Shao,

Fan

et al. 2023

Applied Sciences

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External photoelectric effect of CsPbX3 perovskite in X-ray region

Li¹,

Dong²,

Chen³

et al. 2021

Acta Phys. Sin.

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As a novel low-cost semiconductor with extraordinary photoelectric property, the inorganic CsPbX3 perovskites have become emerging materials for the next generation of X-ray detectors in the past decade. However, most of recent studies of CsPbX3 perovskite X-ray detectors are based on their internal photoelectric effect. Though it is also important and widely used in vacuum X-ray detectors, the external photoelectric effect of CsPbX3 perovskite has been rarely studied by now. Thus, the response sensitivity of the CsPbX3 perovskite’s external photoelectric effect in the X-ray region is studied in the present paper. First, a 230-nm-thick CsPbI2Br membrane is prepared on a metal substrate by a conventional one-step deposition method, with a precursor solution used. Then the external photoelectric responsivity and quantum efficiency of the CsPbI2Br membrane are calibrated in a range from 2000 to 5500 eV at Beijing Synchrotron Radiation Facility. The responsivity is over 5.1 × 10–5 A/W in the range and the quantum efficiency is over 23%. These calibration data are close to those of a traditional X-ray photoelectric material CsI. The Monte-Carlo method is utilized to simulate the external photoelectric effect of CsPbI2Br perovskite, and the external photoelectric responsivity is calculated. The calculated data match well with the calibration, proving the Monte-Carlo method feasible for the external photoelectric effect simulation of CsPbX3 perovskite. Then the external photoelectric responsivities and quantum efficiencies of CsPbX3 perovskites are calculated via the Monte-Carlo method in the X-ray range from 2000 to 10000 eV. The calculated responsivities of different CsPbX3 perovskites are all close to the responsivity of CsI, and an order of magnitude higher than that of Au, and the CsPbX3 quantum efficiencies also follow a similar scenario. This indicates that CsPbX3 perovskites have good external photoelectric properties and potential applications in X-ray vacuum detectors such as photocathode and photomultiplier. The influence of thickness on CsPbX3 photoelectric response is also studied in this paper via Monte-Carlo simulation. The results show that the responsivity increases with the material thickness increasing, which is due to the increased X-ray absorption. The responsivities all reach their upper limits at a material thickness of about 150 nm, which means that the electrons generated at 150 nm can hardly escape from the material surface. It is indicated that the thickness of CsPbX3 should be no less than 150 nm to obtain the optimal photoelectric response.

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Temporal resolution limit estimation of x-ray streak cameras using a CsI photocathode

Cited by 2 publications

References 21 publications

A Calibration Method for Time Dimension and Space Dimension of Streak Tube Imaging Lidar

A Calibration Method for Time Dimension and Space Dimension of Streak Tube Imaging Lidar

External photoelectric effect of CsPb<i>X</i><sub>3</sub> perovskite in X-ray region

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