Numerical Simulations and the Design of Magnetic Field-Enhanced Electron Impact Ion Source with Hollow Cylinder Structure
Numerical Simulations and the Design of Magnetic Field-Enhanced Electron Impact Ion Source with Hollow Cylinder Structure
复制标题
空心圆柱结构磁场增强电子轰击离子源的数值模拟与设计
DOI：
10.1155/2020/2809485
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发表时间：
2020-01
影响因子：
2.6
通讯作者：
Long Tao
中科院分区：
文献类型：
--
作者：
Qi Guochen;Tian Di;Gao Guolun;Liu Guangda;Qiu Chunling;Long Tao
为了提高电子强度和电离效率，设计了一种采用电子碰撞离子源的磁场增强技术。基于离子光学聚焦机制，设计了电子碰撞电离源，并采用中空圆柱体结构设计了电子入射电离室，提高了离子引出效率。用SIMION8.0对其进行了数值模拟和优化，以获得更高的电子强度和离子传输效率。为了提高电子强度，我们研究了灯丝电势和磁场强度的影响，并选择了70 eV和150 Gs的值。在优化参数的基础上，用自制的仪器对实验室空气和氧气进行了检测，并分别在正离子模式和负离子模式下测量了离子强度。将自制的电子碰撞离子源装置应用于质谱计电离源，具有提高电离效率的潜力。
An electron impact ion source-adopted magnetic field-enhanced technology has been designed for enhancing the electron intensity and the ionization efficiency. Based on the ion optic focus mechanism, an electron impact ionization source was designed, and the electron entrance into the ionization chamber was designed with a hollow cylinder structure to improve the ion extraction efficiency. Numerical simulation and optimal geometry were optimized by SIMION 8.0 to provide higher electron intensity and ion transmission efficiency. To improve the electron intensity, the influence of the filament potential and magnetic intensity was investigated, and the values of 70 eV and 150 Gs were chosen in our apparatus. Based on the optimal parameters, the air in the lab and oxygen gas was detected by the homemade apparatus, and the ion intensity was detected in the positive and negative ion modes, respectively. The homemade electron impact ion source apparatus has the potential to enhance ionization efficiency applied in the mass spectrometer ionization source.
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影响因子：
2.4
作者：
P. Ekins
通讯作者：
P. Ekins
影响因子：
1.9
作者：
F. Blattner
通讯作者：
F. Blattner
影响因子：
1.6
作者：
Vicki D Crinis
通讯作者：
Vicki D Crinis
影响因子：
0.2
作者：
R. Eglash
通讯作者：
R. Eglash
DOI：
10.1103/physreva.52.1115
发表时间：
1995-08
期刊：
Physical review. A, Atomic, molecular, and optical physics
影响因子：
--
作者：
Straub;Renault;Lindsay;Smith;Stebbings
通讯作者：
Straub;Renault;Lindsay;Smith;Stebbings