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Numerical Simulation and Experiment Validation of X-ray Streak Camera

Author: WangLiWei
Tutor: XiaoShaLi；LiuShenYe
School: Chongqing University
Course: Instrument Science and Technology
Keywords: Streak camera Image converter tube Electro-optical systems Numerical calculation Spatial resolution
CLC: TB852.1
Type: Master's thesis
Year: 2009
Downloads: 67
Quote: 0
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Abstract


The high-speed scanning of X-ray camera, also known as the streak camera, it is a high-sensitivity, high spatial and temporal resolution of diagnostic equipment. In many ultrafast diagnostic field has a wide range of applications, such as dynamic spectroscopy, optical communications, chemical and biological, laser fusion research (ICF). Streak camera is still faced with the challenge of higher temporal and spatial resolution, and the expansion of the scope of the spectral response, dynamic range expansion, scanning nonlinear correction, imaging time and space distortion troubled. As users of the streak camera, the most concerned about is the role of internal electronic optical system. The paper studied the works of the streak camera, the Chronicles streak camera core component scanning image converter tube structure changes, and simulation and experimental study of the inner workings of the process, try its internal in clear camera works on the basis of numerical reproduction electro-optical systems-depth discussion on the role of the electronic process, and based on this variety of possible factors affecting camera imaging performance. The experimental verification of the accuracy and reliability of the simulation. Simulation using ANSYS simulation software, to simulate the movement of GSM-03 tube two working state. Change its respective electrode design index on the basis of the model parameter modeling, and draw performance parameter changes, and to give each of the electrodes on the image tube forming regular. The simulation is also the position of the image plane, such as magnification and deflection sensitivity calculated. The calculation results show that: the image tube size and shape of the electrode structure is less impact on the electronic imaging, while the voltage applied on the electrode a greater impact on the imaging; changes in relative positions between each of the electrodes is also an impact on the imaging effects. Experimental validation part to take advantage of several key components, including the photocathode replaceable image converter tube, high-voltage power supply, potentiometers, vacuum system to build a simple streak camera experiment platform, and the platform of the basic image tube imaging The performance parameters are tested. Including spatial resolution, the image magnification, the deflection sensitivity. Experimental results show that: the experimental conditions of the test platform to be further improved, and the experimental accuracy of the result remains to be improved. The analysis of the simulation and experimental results show that: the the simulation derived scan image tube imaging law has certain scientific experiments played a guiding role; imaging position, like the difference of magnification and deflection sensitivity theory calculations and experimental results larger, the reasons for this difference discrete numerical analysis and experimental conditions not ideal other factors.

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CLC: > Industrial Technology > General industrial technology > Photography > Photographic machines and equipment > Photographic equipment and replication equipment > Camera
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