Development of a low energy small electron gun to study electron transport in hydrogen negative ion source plasmas

2020 ◽  
Vol 91 (1) ◽  
pp. 013333
Author(s):  
Yoshikatsu Matsumoto ◽  
Masashi Kisaki ◽  
Katsuhiro Shinto ◽  
Haruhisa Nakano ◽  
Mamiko Sasao ◽  
...  
Keyword(s):  
Electron Transport ◽  
Ion Source ◽  
Low Energy ◽  
Electron Gun ◽  
Negative Ion

Characterization and light emission properties of osmium silicides synthesized by low energy ion implantation

2008 ◽  
Vol 1066 ◽  
Author(s):  
Prakash R. Poudel ◽  
K. Hossain ◽  
J. Li ◽  
B. Gorman ◽  
A. Neogi ◽  
...  
Keyword(s):  
Light Emission ◽  
Rutherford Backscattering Spectrometry ◽  
Ion Beam ◽  
Ion Source ◽  
Alpha Particles ◽  
Low Energy ◽  
Negative Ion ◽  
Tandem Accelerator ◽  
Cross Sectional ◽  
Osmium Silicide

ABSTRACTLow energy (55 KeV) Osmium ( Os− ) negative ion beam was used to implant (5×1016 atoms/cm2 ) into p-type-Si (100). The implantation was performed with the ion source of a National Electrostatic Corp. 3 MV Tandem accelerator. The implanted sample was subsequently annealed at 650 °C in a gas mixture that was 4% H2 + 96% Ar. Rutherford Backscattering spectrometry (RBS) analysis with 1.5 MeV Alpha particles was used to monitor the precipitate formation. Photoluminescence (PL) measurements were also performed to study possible applications of silicides in light emission. Cross-sectional Scanning Electron Microscopy (X-SEM) was performed for topographic image of the implanted region. RBS along with PL measurements indicate that the presence of osmium silicide (Os2Si3) phase for light emission in the implanted region of the sample.

Integrodifferential models of electron transport for negative ion sources

2015 ◽  
Vol 81 (6) ◽  
Author(s):  
Marco Cavenago
Keyword(s):  
Electron Transport ◽  
Mean Free Path ◽  
Transverse Magnetic ◽  
Ion Source ◽  
Negative Ion ◽  
Larmor Radius ◽  
Magnetic Flux Density ◽  
Atomic Collisions ◽  
One Dimensional ◽  
Electron Production

Thanks to the presence of a transverse magnetic flux density ($B_{x}$ and $B_{y}$ where $z$ is the extraction axis), the undesired extraction of electrons from a negative ion source is reduced and it is due to collisions. The electron transport is studied with a kinetic model, including Vlasov–Poisson effects and atomic collisions. The integrodifferential equations (IDE) resulting from a reduction to a one-dimensional problem (1-D) by integration on characteristic orbits are strongly affected by the trapped orbits, as here evaluated; a kernel calculation with a partial wave approximation is introduced. Dependencies from the local drift velocity $v_{d}$ and effective Larmor radius $L_{e}$ are found. Solutions are investigated in simple cases with a constant electron current (no additional electron production). Equilibrium solution and electron conductivity are analytically obtained. Presheath solutions are discussed; the approximated conversion to differential equations that are adequate for presheath only (with moderated electric field gradient $E_{z,z}>-eB_{x}^{2}/m$) and their numeric solutions coupled to Poisson equation are reported, and compared to iterative IDE solutions. Examples with different values of $L_{e}$ and mean free path (mfp) ratio are described.

Electrostatic energy analyzer measurements of low energy zirconium beam parameters in a plasma sputter-type negative ion source

2012 ◽  
Vol 83 (2) ◽  
pp. 02B704 ◽  
Author(s):  
Giovanni M. Malapit ◽  
Christian Lorenz S. Mahinay ◽  
Matthew D. Poral ◽  
Henry J. Ramos
Keyword(s):  
Ion Source ◽  
Low Energy ◽  
Negative Ion ◽  
Electrostatic Energy ◽  
Energy Analyzer ◽  
Beam Parameters

Characteristics of a Low Energy Duoplasmatron Negative Ion Source

1967 ◽  
Vol 38 (6) ◽  
pp. 745-748 ◽  
Author(s):  
William Aberth ◽  
James R. Peterson
Keyword(s):  
Ion Source ◽  
Low Energy ◽  
Negative Ion

scholarly journals Study of electron transport across the magnetic filter of NIO1 negative ion source

2017 ◽  
Author(s):  
P. Veltri ◽  
E. Sartori ◽  
M. Cavenago ◽  
G. Serianni ◽  
M. Barbisan ◽  
...  
Keyword(s):  
Electron Transport ◽  
Ion Source ◽  
Negative Ion ◽  
Magnetic Filter

Simulation of electron transport in newly designed large volume ion source.

1994 ◽  
Vol 6 (1) ◽  
pp. 1-4
Author(s):  
Kazutaka KAWAMURA ◽  
Eiji YABE ◽  
Keiji TAKAHASHI ◽  
Kazuo TAKAYAMA
Keyword(s):  
Electron Transport ◽  
Large Volume ◽  
Ion Source
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