Effects of the weak magnetic field and electron diffusion on the spatial potential and negative ion transport in the negative ion source

2004 ◽  
Vol 75 (5) ◽  
pp. 1770-1773 ◽  
Author(s):  
T. Sakurabayashi ◽  
A. Hatayama ◽  
M. Bacal
Keyword(s):  
Magnetic Field ◽  
Ion Transport ◽  
Weak Magnetic Field ◽  
Ion Source ◽  
Negative Ion ◽  
Electron Diffusion

A 3D computer simulation of negative ion extraction influenced by electron diffusion and weak magnetic field

2008 ◽  
Author(s):  
M. Turek ◽  
J. Sielanko ◽  
Hans-Jürgen Hartfuss ◽  
Michel Dudeck ◽  
Jozef Musielok ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Computer Simulation ◽  
Weak Magnetic Field ◽  
Negative Ion ◽  
Electron Diffusion ◽  
Ion Extraction ◽  
3D Computer Simulation

Dependence of H− extraction probability on filter magnetic field and gas pressure of a volume-type negative ion source

2006 ◽  
Vol 506-507 ◽  
pp. 522-526 ◽  
Author(s):  
Y. Matsumoto ◽  
M. Nishiura ◽  
K. Matsuoka ◽  
M. Sasao ◽  
M. Wada ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Ion Source ◽  
Gas Pressure ◽  
Negative Ion

scholarly journals Numerical Simulations and the Design of Magnetic Field-Enhanced Electron Impact Ion Source with Hollow Cylinder Structure

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Guochen Qi ◽  
Di Tian ◽  
Guolun Gao ◽  
Guangda Liu ◽  
Chunling Qiu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electron Impact ◽  
Hollow Cylinder ◽  
Impact Ionization ◽  
Transmission Efficiency ◽  
Ion Source ◽  
Ionization Efficiency ◽  
Negative Ion ◽  
Ionization Source ◽  
Electron Intensity

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.

Improvement of uniformity of the negative ion beams by tent-shaped magnetic field in the JT-60 negative ion source

2014 ◽  
Vol 85 (2) ◽  
pp. 02B314 ◽  
Author(s):  
Masafumi Yoshida ◽  
Masaya Hanada ◽  
Atsushi Kojima ◽  
Mieko Kashiwagi ◽  
Larry R. Grisham ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Ion Beams ◽  
Ion Source ◽  
Negative Ion
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