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A numerical study was conducted to investigate the performance characteristics of a STED with various pressure ratios (PRs) and cone shapes. Due to momentum loss, the pressure in vacuum chamber increased with cone angle for a PR of 75. Also, the STED is started between PRs of 36 and 37 in the case of a cone angle of 15° and a blockage ratio (BR) of 15%. The results for various PRs and cone shapes are presented, and the optimal cone shape is found to have a cone angle of between 5~20° and a BR of between 15~40%.

A Numerical Study on Performance Characteristics of STED with various Pressure Ratios and Cone Shapes using Burnt Gas Properties