To decrease the radiation heat load of the cryopanel is considered to be necessary for the design of cryopumps. In general, a radiation baffle is mounted between the cryopanel and the heat source. The radiation baffle...To decrease the radiation heat load of the cryopanel is considered to be necessary for the design of cryopumps. In general, a radiation baffle is mounted between the cryopanel and the heat source. The radiation baffle absorbs the majority of the radiated heat load. However, the motion of molecules to be pumped is baffled and the pumping speed is lowered at the same time. Therefore the selection of a good radiation baffle is a very important issue for the economical operation of the cryopump. By calculating and comprehensively analyzing the thermal transmission coefficients and the molecular transmission coefficients of baffles of different structures, a type of Chevron baffle is found to be more satisfactory. This paper focuses on the application of the Monte Carlo Method involved in the process of analysis and calculation.展开更多
In this paper, the technology of the phase adjustment of a lower hybrid wave on HT7 superconducting tokamak is described and the calculating method involved in the technology is introduced. The design method of hardw...In this paper, the technology of the phase adjustment of a lower hybrid wave on HT7 superconducting tokamak is described and the calculating method involved in the technology is introduced. The design method of hardware and software is also presented. In addition, a series of experimental results are reported.展开更多
文摘To decrease the radiation heat load of the cryopanel is considered to be necessary for the design of cryopumps. In general, a radiation baffle is mounted between the cryopanel and the heat source. The radiation baffle absorbs the majority of the radiated heat load. However, the motion of molecules to be pumped is baffled and the pumping speed is lowered at the same time. Therefore the selection of a good radiation baffle is a very important issue for the economical operation of the cryopump. By calculating and comprehensively analyzing the thermal transmission coefficients and the molecular transmission coefficients of baffles of different structures, a type of Chevron baffle is found to be more satisfactory. This paper focuses on the application of the Monte Carlo Method involved in the process of analysis and calculation.
基金This work is supported by the National Nature Science Foundation of China No.19975048.
文摘In this paper, the technology of the phase adjustment of a lower hybrid wave on HT7 superconducting tokamak is described and the calculating method involved in the technology is introduced. The design method of hardware and software is also presented. In addition, a series of experimental results are reported.
