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decrease vacuum pressure
相关语句
  提高真空度
     In order to improve the performance of BEPC,the vacuum system of BEPC storage ring has been upgraded systematically,such as remaking the aluminum vacuum chambers to lead out synchrotron radiation light beam,installing NEG pumps in the interaction region to decrease vacuum pressure.
     为了提高北京正负电子对撞机的性能,BEPC储存环真空系统进行了一系列的改进,例如,重新改造铝真空盒用来引出同步辐射光束线,在正负电子对撞区安装NEG泵来提高真空度
短句来源
  相似匹配句对
     Vacuum microelectronic pressure sensor
     真空微电子压力传感器的研制
短句来源
     to decrease the back pressure of condenser;
     降低凝汽器背压;
短句来源
     Vacuum Silicon Pressure Sensor
     硅压阻式真空变送器
短句来源
     pressure;
     压力;
短句来源
     Additionally, the effect increased with the decrease of vacuum in the cell.
     并且,其对水三相点温度的影响随着水三相点容器内真空度的降低而增大。
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The possibility of removal mercury in waste dry cells by a vacuum system was studied, and the effect of temperature, residual pressure and distilled time on the course of the elimination of mercury was investigated. Results show that under the condition of the total chamber pressure of 35-500 Pa, temperature of 300 ℃, the concentration of mercury in waste acid zinc-manganese cell can be decreased to a level lower than 10-6 after being treated for 3 h. Under the condition of the total...

The possibility of removal mercury in waste dry cells by a vacuum system was studied, and the effect of temperature, residual pressure and distilled time on the course of the elimination of mercury was investigated. Results show that under the condition of the total chamber pressure of 35-500 Pa, temperature of 300 ℃, the concentration of mercury in waste acid zinc-manganese cell can be decreased to a level lower than 10-6 after being treated for 3 h. Under the condition of the total chamber pressure of 35-620 Pa, temperature of 300 ℃, the concentration of mercury in waste alkaline zinc-manganese cell can be decreased to lower than 10-6 after being treated for 4 h. Furthermore , enhancing temperature, decreasing vacuum pressure and prolonging distilled time all can accelerate the elimination of mercury.

研究了应用真空法脱除废锌锰干电池中汞的可能性及规律性,并探讨了温度、系统残压、蒸馏时间及破碎形式对脱汞效果的影响。结果表明:含汞10-4 ~10-6 的酸性锌锰干电池,在300 ℃和系统残压为35~500 Pa的条件下,真空处理3 h,残渣含汞量可低于10-6 。汞含量为0.5%~1%的碱性锌锰干电池,在温度300 ℃,系统残压35~620 Pa的条件下,真空处理4 h后,其残渣汞量可降至10-6 的水平。此外,升温、降压、延时及破碎均有利于汞的脱除。在整个工艺过程中,汞实现了真空封闭回收,克服了其他处理工艺普遍存在的汞的二次污染问题,从而消除了废锌锰干电池中的汞对环境的危害。

The vacuum system of BEPC storage ring has run well for 15 years by now,of which the mean dynamic pressure was over 2.6×10~(-7)Pa in the presence of circulating beams for which the lifetime was over 10hr.The occurrence of leaks has been rare in spite of a large number of individual components in the vacuum system.Most of leaks can be eliminated during the first pump-down and overall leak check of a vacuum sector.In order to improve the performance of BEPC,the vacuum system of BEPC storage ring has been upgraded...

The vacuum system of BEPC storage ring has run well for 15 years by now,of which the mean dynamic pressure was over 2.6×10~(-7)Pa in the presence of circulating beams for which the lifetime was over 10hr.The occurrence of leaks has been rare in spite of a large number of individual components in the vacuum system.Most of leaks can be eliminated during the first pump-down and overall leak check of a vacuum sector.In order to improve the performance of BEPC,the vacuum system of BEPC storage ring has been upgraded systematically,such as remaking the aluminum vacuum chambers to lead out synchrotron radiation light beam,installing NEG pumps in the interaction region to decrease vacuum pressure.Especially the in-vacuum magnet wiggler has been mounted into the vacuum system of BEPC storage ring and the static pressure has been up to 2.6×10~(-8)Pa by coating TiN on the surface of the permanent-magnet blocks with reasonable pump-down technique(provided.)

目前BEPC储存环真空系统已经运行了十五年,系统运行良好,当有束流存在时,储存环的平均动态压强低于2.6×10-7Pa,束流寿命大于10 h。尽管真空系统部件多,结构复杂,但由于真空泄漏造成停机的次数并不多,大多数的泄漏能在抽真空和系统检漏期间排除。为了提高北京正负电子对撞机的性能,BEPC储存环真空系统进行了一系列的改进,例如,重新改造铝真空盒用来引出同步辐射光束线,在正负电子对撞区安装NEG泵来提高真空度。特别是真空内的扭摆磁铁被安装到储存环真空系统,通过在永久磁块表面镀氮化钛和合理的排气技术,静态压强已经达到了2.6×10-8Pa。

 

 


 
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