Ion-emission properties of a plasma in a gaseous-ion source with a plasma cathode

2004 ◽  
Vol 49 (1) ◽  
pp. 19-21
Author(s):  
N. V. Gavrilov ◽  
A. S. Kamenetskikh
Keyword(s):  
Ion Source ◽  
Plasma Cathode ◽  
Emission Properties ◽  
Ion Emission

Effect of Ambient Gases on Emission Properties of Pd-Ni-Si-Be-B LM Ion Source

1987 ◽  
Vol 26 (Part 2, No. 2) ◽  
pp. L103-L104 ◽  
Author(s):  
Hiroshi Arimoto ◽  
Eizo Miyauchi ◽  
Hisao Hashimoto
Keyword(s):  
Ion Source ◽  
Emission Properties ◽  
Ambient Gases

Analysis of the Effect of Beam Divergence Angle on Back-Streaming Electron Region in Ion Source for EAST-NBI

2017 ◽  
Author(s):  
Chundong Hu ◽  
Mingshan Wu ◽  
Yahong Xie ◽  
Jianglong Wei ◽  
Ling Yu
Keyword(s):  
Cross Section ◽  
Secondary Electron Emission ◽  
Circular Cross Section ◽  
Ion Source ◽  
Beam Divergence ◽  
Divergence Angle ◽  
Beam Extraction ◽  
Emission Surface ◽  
Ion Emission ◽  
Beam Divergence Angle

During the process of beam extraction in positive ion source under high voltage region, a large number of electrons are produced in the gaps of grids. After back-streaming acceleration, these electrons go back to arc chamber or impinge grids and heat electron dump or grids, which are harmful for the safety of ion source. Under the situation of poor beam extraction optics, a large part of the primary beam ions bombard the surface of suppressor grid. And this process produces a large number of electrons. Due to the huge extracted voltage, the secondary electron emission coefficient of the suppressor grid surface is also great, when beam ions bombard on it. As a result, the grids’ current grows. The curvature of ion emission surface and equipotential surface nearby are mainly connected to the perveance and plasma grid geometry. In order to optimize the beam performance of high current ion source and increase the mean arc efficiency, the plasma grid of accelerator is already replaced from circular cross section grid to diamond cross section grid. As a result, the shape of ion emission surface is only connected to the perveance. According the measurement of the current of suppressor grid and the calculation of the perveance of the corresponding shoot, we can analyze the effect of beam divergence angle on back-streaming electron. When the beam divergence angle increases, the number of back-streaming electrons increases rapidly, and grids current changes significantly, especially the current of gradient grid and suppressor grid. The results can guide the parameters operating on the ion source for EAST-NBI and find the reasonable operation interval of perveance and the best one to ensure the safety and stable running of the ion source, which has great significance on the development of long pulse, high power ion source.

Large-Area Doping for Poly-Si Thin Film Transistors Using Bucket Ion Source with an RF Plasma Cathode

1991 ◽  
Vol 30 (Part 2, No. 4B) ◽  
pp. L772-L774
Author(s):  
Genshiro Kawachi ◽  
Takashi Aoyama ◽  
Takaya Suzuki ◽  
Yasunori Ohno ◽  
Akio Mimura ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Film Transistors ◽  
Ion Source ◽  
Rf Plasma ◽  
Large Area ◽  
Plasma Cathode ◽  
Si Thin Film

Ion emission properties of indium nanowires grown on anodic aluminum oxide template

Vacuum ◽  
2016 ◽  
Vol 131 ◽  
pp. 209-212 ◽  
Author(s):  
Yuming Liu ◽  
Kai Zhang ◽  
Man Li ◽  
Chunqing Zhao ◽  
Xuewei Wang ◽  
...  
Keyword(s):  
Aluminum Oxide ◽  
Anodic Aluminum Oxide ◽  
Anodic Aluminum Oxide Template ◽  
Emission Properties ◽  
Anodic Aluminum ◽  
Ion Emission

Development of oxygen ion source with microwave plasma cathode

1992 ◽  
Vol 63 (4) ◽  
pp. 2595-2597 ◽  
Author(s):  
Yoshio Matsubara ◽  
Hideaki Tahara ◽  
Masato Takahashi ◽  
Shuichi Nogawa ◽  
Junzo Ishikawa
Keyword(s):  
Microwave Plasma ◽  
Ion Source ◽  
Plasma Cathode ◽  
Oxygen Ion

Upgrade of RIKEN 10 GHz Electron Cyclotron Resonance Ion Source Using Plasma Cathode Method

1993 ◽  
Vol 32 (Part 2, No. 9B) ◽  
pp. L1335-L1338 ◽  
Author(s):  
Takahide Nakagawa ◽  
Tadashi Kageyama ◽  
Masayuki Kase ◽  
Akira Goto ◽  
Yasushige Yano
Keyword(s):  
Cyclotron Resonance ◽  
Electron Cyclotron Resonance ◽  
Ion Source ◽  
Electron Cyclotron ◽  
Plasma Cathode
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