研究目的
To develop a forward Monte-Carlo ray-tracing method for constructing a precise projection matrix for the infrared imaging video bolometer (IRVB) to enhance the reconstruction of plasma profiles, especially for plasmas with spatially localized power.
研究成果
The forward Monte-Carlo ray-tracing method provides a more accurate and precise projection matrix for the IRVB, especially for plasmas with spatially localized power. It overcomes the segmentation issue of the forward chief ray method and the shadow sampling zone of the backward chief ray method, offering detailed descriptions of the foil image and enhanced reconstruction performance.
研究不足
The forward Monte-Carlo ray-tracing method requires a significant computing load and data handling capacity due to the generation and calculation of over 2.7 G rays, with the database size reaching almost 100 GB.
1：Experimental Design and Method Selection:
The study proposes a forward Monte-Carlo ray-tracing method to construct a precise projection matrix for the IRVB. This method involves generating random rays from plasma cells to the foil to accurately model the power distribution.
2：Sample Selection and Data Sources:
The plasma bulk volume is divided into cells along radial, vertical, and angular axes, with random source points generated in each cell to simulate the radiation.
3：List of Experimental Equipment and Materials:
The IRVB system consists of a pinhole camera module and an IR camera module, with a platinum foil screen and a periscope for image measurement.
4：Experimental Procedures and Operational Workflow:
The method involves generating rays from source points in plasma cells to random target points at the aperture, calculating their hitting points at the foil, and aggregating the power of the rays to construct the projection matrix.
5：Data Analysis Methods:
The projection matrix is evaluated by comparing synthetic foil images and reconstruction outputs using the Phillips-Thikhonov algorithm.
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