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

Study on the energy distribution of ion beams extracted from the sputter-type negative-ion source

1996 ◽  
Author(s):  
Junzo Ishikawa ◽  
Hiroshi Tsuji ◽  
Takashi Takatori ◽  
Yasuhito Gotoh
Keyword(s):  
Energy Distribution ◽  
Ion Beams ◽  
Ion Source ◽  
Negative Ion

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.

The drift source: A negative ion source module for direct current multiampere ion beams

1999 ◽  
Vol 70 (12) ◽  
pp. 4542-4544 ◽  
Author(s):  
A. Simonin ◽  
G. Delogu ◽  
C. Desgranges ◽  
M. Fumelli
Keyword(s):  
Direct Current ◽  
Ion Beams ◽  
Ion Source ◽  
Negative Ion

A 14 cm×36 cm volume negative ion source producing multi‐ampere H− ion beams

1990 ◽  
Vol 61 (1) ◽  
pp. 499-501 ◽  
Author(s):  
M. Hanada ◽  
T. Inoue ◽  
H. Kojima ◽  
Y. Matsuda ◽  
Y. Ohara ◽  
...  
Keyword(s):  
Ion Beams ◽  
Ion Source ◽  
Negative Ion

Reversal ion source: A new source of negative ion beams

1985 ◽  
Vol 56 (1) ◽  
pp. 69-72 ◽  
Author(s):  
O. J. Orient ◽  
A. Chutjian ◽  
S. H. Alajajian
Keyword(s):  
Ion Beams ◽  
Ion Source ◽  
Negative Ion

scholarly journals RF and Microwave Ion Sources Study at Institute of Modern Physics

Plasma ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 332-344
Author(s):  
Qian Y. Jin ◽  
Yu G. Liu ◽  
Yang Zhou ◽  
Qi Wu ◽  
Yao J. Zhai ◽  
...  
Keyword(s):  
Microwave Plasma ◽  
Ion Beam ◽  
Ion Beams ◽  
Ion Source ◽  
Negative Ion ◽  
Power Coupling ◽  
Beam Production ◽  
Planar Coil ◽  
Coil Antenna ◽  
Ridged Waveguide

Intense ion beam production is of high importance for various versatile applications from accelerator injectors to secondary ion mass spectrometry (SIMS). For these purposes, different types of ion beams are needed and, accordingly, the optimum plasma to produce the desired ion beams. RF-type plasma features a simple structure, high plasma density and low plasma temperature, which is essential for negative ion beam production. A very compact RF-type ion source using a planar coil antenna has been developed at IMP for negative molecular oxygen ion beam production. In terms of high-intensity positive ion beam production, 2.45 GHz microwave power-excited plasma has been widely used. At IMP, we developed a 2.45 GHz plasma source with both ridged waveguide and coaxial antenna coupling schemes, tested successfully with intense beam production. Thanks to the plasma built with an external planar coil antenna, high O2− production efficiency has been achieved, i.e., up to 43%. With 2.45 GHz microwave plasma, the ridged waveguide can support a higher power coupling of high efficiency that leads to the production of intense hydrogen beams up to 90 emA, whereas the coaxial antenna is less efficient in power coupling to plasma but can lead to attractive ion source compactness, with a reasonable beam extraction of several emA.

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