欧美久久丝袜,久久精品日产精品99国产精偷,国产a级毛片,国产成人精品综合在线观看

            
Location: Home > News

News

The mass spectrometry principle of helium mass spectrometer leak detector
Release time:2024-11-12 Browse:  Order

  he helium mass spectrometer leak detector is a gas tightness detection instrument made using helium gas as the exploration gas based on the principles of mass spectrometry The mass spectrometry principle is shown in the figure.

  

1902320.jpg

 

  

The mass spectrometry principle of helium mass spectrometer leak detector

The electrons emitted by the filament oscillate back and forth in the ionization chamber, colliding with the gas inside the chamber and the helium gas that enters the chamber through the leakage hole of the tested object, causing it to ionize into positive ions. These ions enter the magnetic field under the action of an accelerating electric field, and are deflected by the Lorentz force, forming a circular arc orbit with a radius of

In the formula, R&dash& mdash; Distance from the deflection orbit radius (cm)

B&dash& mdash; Magnetic field strength (T)

&--& mdash; Ion mass/charge ratio (positive integer)

U&dash& mdash; Ion acceleration voltage (V)

As can be seen from the above equation, when R and B are constant values, changing the acceleration voltage can cause ions of different masses to pass through the magnetic field and the receiving slit to reach the receiving electrode and be detected.

This article is collected and organized by vacuum coating machine manufacturer Aijia Vacuum from the internet, for learning and reference only!







  上一篇:Application of Vacuum Coating Technology in Electronic Components

  下一篇:暫無

  
女女调教亚洲女同第一区| 一区二区狠狠色丁香久久婷婷 | 蜜桃臀久久久蜜桃臀久久久蜜桃臀| 婷婷五月最新地址| 中文字幕人成人乱码| 久久亚洲综合网站| 欧美国产精品日韩在线| 欧美性爱一区| 欧美色狠| 亚洲AV尺码| 欧美日韩国产一区二区三区在线观看| 在线黄字幕网欧美| 欧美日韩一区二区三区免费不卡| 天天日天天干狠狠艹| 午夜男女久久久| 国产精品久久久AV三级| 国产av偷自第| 欧美日韩免费影院| 91精品一 二 三区| 亚洲AV日韩Av无码久久| 无码午夜福利一区二区三区 | 一本大道香蕉久在线29| 国产成年人免费| 亚洲中文欧美日韩在线| 免费以及亚洲熟妇色自偷自拍| 久久超级碰碰免费视频| 呦呦免费在线观看| 欧美亚洲日韩国产网站| 高清亚洲美熟妇| 最近免费韩国电影高清版无吗| 欧美日韩黄业| 中文字幕熟妇人妻在线女人视频| 亚洲欧美激情精品日韩| 精品三级久久久久久久电影| 亚洲国产精品色吊丝| 国产精品无码一区二区三区免费,| 国产亚洲这些av| 日本a级在线视频.| 欧美日韩第二页| 欧美制服丝袜久久| 欧美日韩亚洲国产无线码|