Elemental Analysis of Materials by Methods of Ion-Beam Diagnostics

2021 ◽  
Vol 15 (4) ◽  
pp. 712-716
Author(s):  
M. S. Afanasiev ◽  
E. V. Egorov ◽  
V. K. Egorov ◽  
G. V. Chucheva
Keyword(s):  
Elemental Analysis ◽  
Ion Beam ◽  
Beam Diagnostics

scholarly journals Simulation codes for light-ion diode modeling

1994 ◽  
Vol 12 (2) ◽  
pp. 283-324 ◽  
Author(s):  
J.P. Quintenz ◽  
D.B. Seidel ◽  
M.L. Kiefer ◽  
T.D. Pointon ◽  
R.S. Coats ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Power Flow ◽  
Ion Beam ◽  
Inertial Confinement ◽  
Beam Diagnostics ◽  
Computational Tools ◽  
Field Diffusion ◽  
Confinement Fusion ◽  
Computer Codes ◽  
Inertial Confinement Fusion Program

The computational tools used in the investigation of light-ion diode physics at Sandia National Laboratories are described. Applied-B ion diodes are used to generate intense beams of ions and focus these beams onto targets as part of Sandia's inertial confinement fusion program. Computer codes are used to simulate the energy storage and pulse forming sections of the accelerator and the power flow and coupling into the diode where the ion beam is generated. Other codes are used to calculate the applied magnetic field diffusion in the diode region, the electromagnetic fluctuations in the anode-cathode gap, the subsequent beam divergence, the beam propagation, and response of various beam diagnostics. These codes are described and some typical results are shown.

The Grolier Codex: A Non Destructive Study of a Possible Maya Document using Imaging and Ion Beam Techniques

2007 ◽  
Vol 1047 ◽  
Author(s):  
Jose Luis Ruvalcaba ◽  
Sandra Zetina ◽  
Helena Calvo del Castillo ◽  
Elsa Arroyo ◽  
Eumelia Hernández ◽  
...  
Keyword(s):  
New York ◽  
Elemental Analysis ◽  
Rutherford Backscattering Spectrometry ◽  
Ion Beam ◽  
Unknown Origin ◽  
Blue Pigment ◽  
Early Colonial ◽  
Paper Fibers ◽  
Non Destructive ◽  
Preparation Layer

AbstractThe Grolier Codex has been a controversial document ever since its late discovery in 1965. Because of its rare iconographical content and its unknown origin, specialists are not keen to assure its authenticity that would set it amongst the other tree known Maya codes in the world (Dresden, Paris Codex and Madrid Codex).The document that has been kept in the Museo Nacional de Antropología in Mexico City, after its exposure in 1971 at the Grolier Club of New York, has been analyzed by a set of non-destructive techniques in order to characterize its materials including paper fibers, preparation layer and colors composition. The methodology included UV imaging, IR reflectography and optic microscopy examinations as well as Particle Induced X-ray Emission (PIXE) and Rutherford Backscattering Spectrometry (RBS) using an external beam setup for elemental analysis. All the measurements were carried out at 3MV Pelletron Accelerator of the Instituto de Física, UNAM. The aim of this work is to verify if the materials in the Grolier Codex match those found for other pre-Hispanic documents.From the elemental composition we concluded that the preparation layer shows the presence of gypsum (CaSO4), color red is due to red hematite (Fe2O3) and black is a carbon-based ink. These results agree with previous analyses carried out by Scanning Electron Microscopy (SEM-EDX) on few samples. However, the presence of Maya Blue in the blue pigment cannot be assured. The examination using UV and IR lights shows homogeneity in the inks and red color but dark areas that contain higher amounts of K in the preparation layer. This paper discusses the results obtained for the UV-IR examinations and the elemental analysis. A comparison with other studies on pre-Hispanic and early colonial codex is presented.

Alternative FIB TEM Sample Preparation Method for Cross-Sections of Thin Metal Films Deposited on Polymer Substrates

2013 ◽  
Vol 19 (4) ◽  
pp. 1080-1091 ◽  
Author(s):  
Felipe Rivera ◽  
Robert Davis ◽  
Richard Vanfleet
Keyword(s):  
Sample Preparation ◽  
Cross Sections ◽  
Elemental Analysis ◽  
Focused Ion Beam ◽  
Preparation Method ◽  
Ion Beam ◽  
Sample Preparation Method ◽  
Site Specific ◽  
Polymer Substrates ◽  
Interface Layers

AbstractTransmission electron microscopy (TEM) and focused ion beam (FIB) are proven tools to produce site-specific samples in which to study devices from initial processing to causes for failure, as well as investigating the quality, defects, interface layers, etc. However, the use of polymer substrates presents new challenges, in the preparation of suitable site-specific TEM samples, which include sample warping, heating, charging, and melting. In addition to current options that address some of these problems such as cryo FIB, we add an alternative method and FIB sample geometry that address these challenges and produce viable samples suitable for TEM elemental analysis. The key feature to this approach is a larger than usual lift-out block into which small viewing windows are thinned. Significant largely unthinned regions of the block are left between and at the base of the thinned windows. These large unthinned regions supply structural support and thermal reservoirs during the thinning process. As proof-of-concept of this sample preparation method, we also present TEM elemental analysis of various thin metallic films deposited on patterned polycarbonate, lacquer, and poly-di-methyl-siloxane substrates where the pattern (from low- to high-aspect ratio) is preserved.

THE NEW LOW ENERGY ION BEAM ANALYSIS FACILITY AT MAPUTO UNIVERSITY

1995 ◽  
Vol 05 (04) ◽  
pp. 249-253
Author(s):  
R.J. UTUI ◽  
N.P.O. HOMMAN ◽  
K.G. MALMQVIST
Keyword(s):  
Ion Beam ◽  
Low Energy ◽  
Proton Accelerator ◽  
Nuclear Reaction Analysis ◽  
Beam Diagnostics ◽  
Ion Beam Analysis ◽  
X Ray ◽  
Beam Analysis ◽  
Set Up ◽  
Eduardo Mondlane University

A new Ion Beam Analysis (IBA) facility which was recently installed in the Department of Physics of the Eduardo Mondlane University of Maputo, Mozambique, is described. The set up is based on a low energy (500 keV) Van de Graaff proton accelerator and is intended to be used in particle induced X-ray emission (PIXE), Rutherford Backscattering (RBS) and nuclear reaction analysis (NRA). Preliminary experiments on beam diagnostics were performed successfully and the followed procedure is described.

Analytical study of crossed atom-laser beam plasma diagnostics

1976 ◽  
Vol 15 (3) ◽  
pp. 381-388
Author(s):  
Kaare J. Nygaard
Keyword(s):  
Laser Beam ◽  
Analytical Study ◽  
Ion Beam ◽  
Hydrogen Plasma ◽  
Forward Direction ◽  
Beam Diagnostics ◽  
Plasma Region ◽  
Atom Beam ◽  
First Approximation ◽  
Electric And Magnetic Fields

A new method using crossed laser and atom beams within a plasma is capable of determining the electron density with a spatial resolution of 1 mm and a time resolution of 2–5 nsec. The measurement is done in the forward direction of the atom beam and is to a first approximation independent of electric and magnetic fields inside and outside the plasma region. A calculation is carried out for a neutral cesium beam probing a fully ionized hydrogen plasma. It is pointed out that a laser beam can also be combined with available ion beam diagnostics.

Simulation and interpretation of ion beam diagnostics on PBFA‐II

1988 ◽  
Vol 59 (8) ◽  
pp. 1709-1711 ◽  
Author(s):  
T. A. Mehlhorn ◽  
W. E. Nelson ◽  
J. E. Maenchen ◽  
W. A. Stygar ◽  
C. L. Ruiz ◽  
...  
Keyword(s):  
Ion Beam ◽  
Beam Diagnostics

scholarly journals Characterization of online high dynamic range imaging for laser-driven ion beam diagnostics using visible light

2017 ◽  
Vol 3 (2) ◽  
pp. 343-346
Author(s):  
Franz Englbrecht ◽  
Felix Balling ◽  
Thomas Federico Rösch ◽  
Matthias Würl ◽  
Florian Hans Lindner ◽  
...  
Keyword(s):  
Spatial Information ◽  
Dynamic Range ◽  
Ion Beam ◽  
Complementary Metal Oxide Semiconductor ◽  
Laser Pulses ◽  
High Dynamic Range ◽  
Oxide Semiconductor ◽  
Beam Diagnostics ◽  
Spatially Resolved ◽  
Single Frame

AbstractLaser-driven acceleration of particle beams is an emerging modality under research for biomedical applications. The spatially resolved diagnostics of laser-accelerated proton bunches is crucial for their application. The RadEye detector, featuring up to 10 cm x 5 cm area of online complementary metal-oxide-semiconductor (CMOS) detector made of 48 μm pixels, is established for x-ray, proton and ion beam diagnostics. We exploit the usually undesired ‘Image lag’ phenomenon of incomplete pixel reset to generate 2D-images with a larger dynamic range than the single frame range of 12-bit. Using 532 nm laser pulses and computer simulations for single-slit diffraction, calibration factors to stack multiple readouts were successfully derived to quantitatively reconstruct spatial information about an optical beam and hence extend the dynamic range of the detector compared to a single frame. The final goal is focus quantification for a permanent magnet quadrupole system for protons and terawatt (TW-class) laser focus diagnostics.

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