研究目的
Investigation of electron beam moire fringes (EBMF) generated by a pulse-dilation framing camera using different lasers and measurement of their characteristics.
研究成果
The study successfully measures EBMF rotation angles and calculates wavefront curvature radii for ns-laser and fs-laser, proposing novel applications for pulse-dilation framing cameras in investigating curved surfaces and developing higher spatial performance EBMF-based cameras.
研究不足
The study is limited by the specific setup and conditions of the pulse-dilation framing camera and the characteristics of the lasers used. Further investigations are needed to explore the full potential of EBMF-based technologies.
1：Experimental Design and Method Selection:
The study involves the use of a pulse-dilation framing camera to generate and measure EBMF characteristics with ns-laser and fs-laser.
2：Sample Selection and Data Sources:
The experiment uses an Au-PC with specific spatial frequencies and a mesh to generate EBMF.
3：List of Experimental Equipment and Materials:
Includes a pulse-dilation framing camera, ns-laser, fs-laser, Au-PC, mesh, drift area, magnetic lens, MCP framing camera, and CCD.
4：Experimental Procedures and Operational Workflow:
The setup involves generating photoelectrons with lasers, passing them through a drift area, and imaging with a magnetic lens onto a MCP framing camera.
5：Data Analysis Methods:
The rotation angles of EBMF are measured and used to calculate the wavefront curvature radii of the lasers.
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pulse-dilation framing camera
Used to generate and measure electron beam moire fringes (EBMF) with high temporal resolution.
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ns-laser
Used to excite photoelectrons for generating EBMF.
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fs-laser
Used to excite photoelectrons for generating EBMF with higher intensity and shorter pulse width compared to ns-laser.
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Au-PC
Photocathode with microstrip-line structure for generating photoelectrons.
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mesh
Used in conjunction with the photocathode to form the accelerating area for photoelectrons.
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magnetic lens
Used for imaging the electron beam onto the MCP framing camera.
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MCP framing camera
Used to capture and multiply the photoelectrons for imaging.
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CCD
1392 × 1040 pixels
Used to record the visible light image converted by the phosphor screen.
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