Experimental Technology Study On Ion Transport Characteristics In Plasmas

With the continuous decreasing in the non-renewable energy,the applicatio7 n of nuclear energy is becoming an unstoppable trend in the future.In the current technical scope,the nuclear fission technology is the main nuclear energy provider with uranium 235 as the major fuel.Researchers have proposed the use of photo-ionized plasmas by lasers to enrich uranium.Based on this background and the experimental platform of the Plasma Health Scientech group of Tsinghua University,the research work of experimental techniques for ion transport characteristics in plasmas was carried out.The calibration rate study for the ion field transport process of the parallel plate electrostatic field was carried out.The empirical relationship of the ion extraction current and extraction time with the key controllable operation parameters,such as plasma initial density,electron temperature,electrode gap spacing,etc.,is established,and the corresponding variation trends are also studied experimentally.The experiments of parallel plates,?-type and M-type plates were compared,and the M-type plates were the most efficient.It provides a basis for the prediction of ion extraction current and extraction time under different experimental conditions.The existing data processing software of argon plasma collisional-radiative model is optimized.By developing the computer codes with Matlab,the database and analysis interface are established.The calculation speed of plasma electron density and temperature is increased by loading the database and Excel data.The purpose of real-time processing of the experimental data is achieved.Designed a pulsed power supply for studying the characteristics of decaying plasma during ion transport.The power supply mainly consists of a high-voltage DC power supply and a solid-state modulator.The solid-state modulator is achieved by employing the MOSFET series voltage divider with a Single Chip Microcomputer as the control center.The feasibility of the scheme of this power supply is also tested by simulations using the software of PSpice.Figure 53;Table 4;Reference 47.