Anisotropic etching of polymer films by high energy (∼100s of eV) oxygen atom neutral beams

2001 ◽  
Vol 19 (2) ◽  
pp. 398-404 ◽  
Author(s):  
Siddhartha Panda ◽  
Demetre J. Economou ◽  
Lee Chen
Keyword(s):  
Oxygen Atom ◽  
Polymer Films ◽  
High Energy ◽  
Anisotropic Etching ◽  
Neutral Beams

Theoretical Studies of High Energy Oxygen Atom Chemistry

2004 ◽  
Author(s):  
M. Braunstein ◽  
J. Duff ◽  
R. Shroll ◽  
L. Bernstein ◽  
S. Adler-Golden
Keyword(s):  
Oxygen Atom ◽  
High Energy ◽  
Theoretical Studies ◽  
Atom Chemistry

High-energy ion implantation in polymer films

Vacuum ◽  
1992 ◽  
Vol 43 (5-7) ◽  
pp. 699-701 ◽  
Author(s):  
L Ya Alimova ◽  
IE Djamaletdinova ◽  
TS Pugacheva ◽  
IE Ilicheva
Keyword(s):  
Ion Implantation ◽  
Polymer Films ◽  
High Energy

Bond-Breaking Efficiency of High-Energy Ions in Ultrathin Polymer Films

2018 ◽  
Vol 121 (6) ◽  
Author(s):  
R. Thomaz ◽  
P. Louette ◽  
G. Hoff ◽  
S. Müller ◽  
J. J. Pireaux ◽  
...  
Keyword(s):  
Polymer Films ◽  
High Energy ◽  
Bond Breaking ◽  
High Energy Ions ◽  
Ultrathin Polymer Films

Interaction of high-energy neutral beams with crystals

1983 ◽  
Vol 69 (3-4) ◽  
pp. 247-251
Author(s):  
M. A. Kumakhov ◽  
F. F. Komarov
Keyword(s):  
High Energy ◽  
Neutral Beams

scholarly journals Energy composition of high-energy neutral beams on the COMPASS tokamak

Nukleonika ◽  
2016 ◽  
Vol 61 (4) ◽  
pp. 419-423
Author(s):  
Klara Mitosinkova ◽  
Jan Stöckel ◽  
Jozef Varju ◽  
Vladimir Weinzettl
Keyword(s):  
Plasma Heating ◽  
High Energy ◽  
Ion Source ◽  
Neutral Beam ◽  
Beam Power ◽  
Neutral Beams ◽  
Before And After ◽  
Copper Shield ◽  
Single Aperture ◽  
Energy Components

Abstract The COMPASS tokamak is equipped with two identical neutral beam injectors (NBI) for additional plasma heating. They provide a beam of deuterium atoms with a power of up to ~(2 × 300) kW. We show that the neutral beam is not monoenergetic but contains several energy components. An accurate knowledge of the neutral beam power in each individual energy component is essential for a detailed description of the beam- -plasma interaction and better understanding of the NBI heating processes in the COMPASS tokamak. This paper describes the determination of individual energy components in the neutral beam from intensities of the Doppler-shifted Dα lines, which are measured by a high-resolution spectrometer viewing the neutral beam-line at the exit of NBI. Furthermore, the divergence of beamlets escaping single aperture of the last accelerating grid is deduced from the width of the Doppler-shifted lines. Recently, one of the NBI systems was modified by the removal of the Faraday copper shield from the ion source. The comparison of the beam composition and the beamlet divergence before and after this modification is also presented.

Modification and Study of Polymer Films Using High Energy Ion Beams

1983 ◽  
Vol 25 ◽  
Author(s):  
T. Venkatesan
Keyword(s):  
Polymer Films ◽  
Ion Beam ◽  
Composite Films ◽  
High Energy ◽  
Carbon Films ◽  
Beam Irradiation ◽  
Ion Beam Irradiation ◽  
Inorganic Composites ◽  
Yield Information ◽  
High Energy Ions

ABSTRACTRecent results on the effects of high energy ion beam irradiation in polymer films are reviewed in this paper. High energy ions (>10 keV/amu) deposit a large amount of energy (∼several cV/atom) in ionizing the electrons of the target atoms. This results in significant destruction of bonds in the films as a result of which polymers undergo rapid dissociation. Using a quadrupole mass spectrometer the study of transient emission of molecular species produced by an ion pulse has been shown to yield information about the diffusion and reaction kinetics of various molecules in the polymer. The fact that polymers undergo dissociation and those atoms which form volatile species are selectively depleted from the film could be utilized in producing useful inorganic composites by ion bombardment of polymers. For example, hard SiC composite films have been produced by ion beam irradiation of organo-silicon polymers. Eventually, polymer dissociation leads to a predominately carbon containing film which exhibits interesting electronic transport properties. Experiments on ion irradiated, pure carbon films indicate that a metallic form of carbon is produced from the polymer films at high irradiation doses.

RF Accelerated High Energy (1-3 MeV) Neutral Beams for Tokamak Plasma Heating, Current Drive and Alpha Diagnostics

1989 ◽  
Vol 15 (2P2A) ◽  
pp. 734-739 ◽  
Author(s):  
W. R. Becraft ◽  
† J.H. Whealton ◽  
T.P. Wangler ◽  
‡ A. Schempp ◽  
** G.E. McMichael ◽  
...  
Keyword(s):  
Plasma Heating ◽  
High Energy ◽  
Current Drive ◽  
Tokamak Plasma ◽  
Heating Current ◽  
Neutral Beams
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