| 1. | Chromatographic composition analysis of oil - field gas by cryogenic condensation sampling
油田气组成分析.低温冷凝取样气相色谱法 |
| 2. | The skid mounted processing unit of natural gas was developed by the scheme of low temperature , condensation and dryness
在开发撬装天然气处理装置时，采用低温冷凝加干燥的方案。 |
| 3. | To research in the area of liquid helium cryopump used in nbi system is meaningful for obtaining better beam transportation efficiency . physical parameters and experience are obtained that are very useful in developing cryopumps
开展中性束注入系统液氦低温冷凝泵的研究，对获得优良的束传输效率，具有非常重大的意义；并为以后相关应用领域中低温冷凝泵的设计提供了性能参数和工程经验。 |
| 4. | To research in the area of liquid helium cryopump used in nbi system is meaningful for obtaining better beam transportation efficiency . physical parameters and experience were obtained which is very useful in developing even larger cryopump
开展中性束注入系统液氦低温冷凝泵的相关研究，对获得优良的束传输效率，具有积极的意义；并为以后开发更大抽速的低温泵及相关应用积累了丰富的物理参数和经验。 |
| 5. | 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泵，具有工作压强范围宽、能获得清洁真空环境的特点。 |
| 6. | Studies on the determining of the performance of 4 . 0 l05l / s ( for h2 ) liquid helium cryocondensation pump are developed in detail . the principle of physical absorption is analyzed . the design of liquid helium cryocondensation pump , heat and mass transfer , performance testing are also researched
针对嵌入式布置于中性束注入系统的4 . 0 10 ~ 5l s液氦低温冷凝泵展开了详细研究，分析了液氦低温冷凝泵的物理吸附机理，并进行了lhe低温冷凝泵的设计、传热传质分析和性能测试。 |
| 7. | The theoretical analysis of large cryocondensation pump for nbi was mainly concerned . this paper emphasized on analyzing and calculating the heat load of cryocondensation pump , simulating thermal transmission coefficient and molecule transmission coefficient of radiation baffle according to monte carlo method , analyzing the process on cryo - surface and the factor of affecting pumping speed and hydrogen layer thickness of influencing cryo - parameter , etc . finally by verifying the pumping speed on large cryocondensation pump for neutral beam injection system , the pumping speed of 4 . 0x105l / s ( for h2 ) was proven to be reasonable
本文首先介绍了中性束注入系统的国内外发展状况，阐述了中科院等离子体所ht - 7中性束注入系统的构成，主要对用于中性束注入系统的大型低温冷凝泵的特性进行了理论分析；对冷凝抽气面的热负载进行了分析计算；用蒙特卡罗法对辐射挡板的分子传输几率与热传输几率进行了模拟计算；研究了低温表面的处理方法对抽速的影响以及氢层厚度对各低温参数的影响；最后对用于中性束注入系统的大型低温冷凝泵的抽速进行了验证，得出的结论是：选取40万升秒的抽速是合理的。 |
| 8. | Liquid helium cryocondensation pump has great advantages in large pumping speed , working pressure range and high ultimate pressure , etc . it ' s more excellent than any other vacuum pump . it can meet the vacuum requirement of nbi and can improve the transportation efficiency . the development of neutral beam injection ( nbi ) system in the world , the structure of nbi system used on the ht - 7 device of asipp was introduced in the thesis
液氦低温冷凝泵是利用低温面对气体有强吸附能力的原理，实现抽气的真空获得设备，它具有抽速大、工作压强范围宽、极限真空度高等一系列优点，是普通真空设备无法比拟的，作为中性束注入系统的主抽泵，它能满足中性束注入系统对大抽速的要求，提高中性束的传输效率。 |
