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    A set of pumping system was designed for the NBI system that consists of two 4.2k liquid helium cryopumps with 4.0×105l/s and 2.0×104l/s pumping speed for hydrogen gas respectively and two auxiliary turbomolecular pumping sets.
    设计了一套用于NBI的差分式真空抽气系统,该系统以两台对H2抽速分别4.0×105l/s和2.0×104l/S的4.2K液氦低温冷凝为真空主抽,以涡轮分子机组为真空预抽系统。
    The optical pumping and magnetic resonance is an experiment designed for studying the supper fine structure of atoms applying the optical pumping effect. It is basic and important as one of the modern physical experiments. This artivle explains the principle of optical pumping and magnetic resonance from the oscillograph show.
    光磁共振是利用光抽运效应来研究原子超精细结构塞曼能级间的磁共振.它是近代物理实验中一个基本而重要的实验.本文从示波器的相关图象出发,阐释光抽运原理以及光磁共振原理,使学生不但能清楚理解光抽运、光磁共振的微观物理过程,且对光磁共振原理达到系统全面的理解
    It consists of a mini flight tube, power supplies and a tiny turbomolecular diaphragm pumping system with a total volume of 45cm×60cm×25cm only.
    整个仪器包括小型飞行管、配套电源和小型分子——薄膜机组等,体积仅为45cm×60cm×25cm。
    The pumping system is a combination of four turbomolecular pumps with three stages pumping for the HL2A vacuum vessel preassembling,giving a total effective pumping speed of 6.4m3·s-1(H2) for the vessel.
    4套前级汇总式分子三级抽气机组由包括4套3500L·s-1分子、2套600L·s-1罗茨增压和2套70L·s-1机械组成,对环有效抽速为6 4m3·s-1(H2)。
    Pumping Speed of ion Pump in Low Magnetic Field Mode
    弱磁场时离子抽速计算
    UNDERSTANDING OF THE PRINCIPLE OF OPTICAL PUMPING AND MAGNETIC RESONANCE FROM OSCILLOGRAPH SHOW
    光磁共振原理的图象阐释
    The working principle of liquid helium cryocondensation pump is strong absorptive force between 4.2K cryogenic surface and gas molecules. The pump has great advantage in large instant pumping speed under high gas load, large working pressure range, high & neat ultimate vacuum.
    利用4.2K低温面对气体的物理吸附机制实现高气载下瞬时大抽速的液氦低温冷凝,具有工作压强范围宽、能获得清洁真空环境的特点。
    Then the design and performance of multi-stage turbo-disc with the corrected factor are mainly discussed. After the modification of pumping performance, the design methods different from befere the modification are discussed. It is especially important to the design of a new compound molecular pump for researching and manufacture.
    然后着重讨论了修正后的涡轮组合叶列的性能设计,提出了与修正前不同的设计思想,对于涡轮分子、尤其是为复合式分子的性能设计提供了重要的理论依据。
    The torus high vacuum pumping system consists of a series of internal cryopumps located in most of the lower ports (up to 20) and additional turbomolecular pumps located outside of the bioshield.
    环高真空系统是由一组处于真空室内16 个下部舱口内的低温和一组处于生物屏蔽层外的附加涡轮分子组成的。
    The effective pumping speed of the titanium sublimation pump is calculated according to the formulas and is validated by the experiment.
    根据公式估算出钛升华的有效抽速并通过实验得到证实 ;
    The comparisons of thermal performance under three constraints(identical mass flow,identical pressure drop and identical pumping power) indicate that the overall heat transfer performance of the channel with mounted LVGs on two sidewalls is better than that of the channel with mounted LVGs on one sidewall.
    在3种不同比较准则(相同质量流量、相同压降及相同功)下,两侧带同向LVGs通道的综合性能好于单侧带有LVGs通道的综合性能.
 

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