Time-resolved measurement of X-ray emission from Al2O3 targets induced by low-energy ion bombardment

2006 ◽  
Vol 38 (12-13) ◽  
pp. 1641-1645
Author(s):  
Minghui Song ◽  
Masaki Takeguchi ◽  
Kazuo Furuya
Keyword(s):  
Ion Bombardment ◽  
Low Energy ◽  
Time Resolved ◽  
X Ray

Near-edge X-ray absorption fine-structure studies of GaN under low-energy nitrogen ion bombardment

2006 ◽  
Vol 252 (10) ◽  
pp. 3413-3416 ◽  
Author(s):  
V.A. Coleman ◽  
M. Petravić ◽  
K.-J. Kim ◽  
B. Kim ◽  
G. Li
Keyword(s):  
Fine Structure ◽  
Ion Bombardment ◽  
Low Energy ◽  
X Ray ◽  
Absorption Fine ◽  
Nitrogen Ion ◽  
X Ray Absorption

Low Energy X-Ray Transmission Images by using a Microfocus X-Ray Tube and a be-Window X-Ray Image Intensifier(XRII)

1998 ◽  
Vol 4 (S2) ◽  
pp. 494-495
Author(s):  
H. Konuma ◽  
K. Kuroki ◽  
K. Kurosawa ◽  
N. Saitoh
Keyword(s):  
Real Time ◽  
Light Element ◽  
Image Intensifier ◽  
High Energy ◽  
Low Energy ◽  
Absorption Coefficients ◽  
Tube Voltage ◽  
Time Resolved ◽  
X Ray ◽  
Time Resolved Measurements

Photographs of x-ray transmission images by x-ray films have been used for observing the inside nondestructively. Further, Imaging Plates(IP) are used for precise measurements of x-ray diffraction patterns. But, these integrating area detectors are not suitable for real time nor time resolved measurements. For real time and time resolved measurements, the X-Ray Image Intensifier(XRII, a large image tube that converts an x-ray image into a visible image) is used for biological x-ray TV systems, x-ray nondestructive inspection systems etc. These TV x-ray image systems require high energy x-rays, x-ray tube voltage of 30 to 150 kV, and show faint contrast for x-ray images of light element substances owing to its low absorption coefficients. However, light elements have intense x-ray absorption coefficients in a low energy x-ray region, x-ray tube voltage of 5 to 20 kV, and give fine contrast for x-ray images of light element substances.

Liquid X-ray scattering with a pink-spectrum undulator

2013 ◽  
Vol 21 (1) ◽  
pp. 177-182 ◽  
Author(s):  
S. Bratos ◽  
J.-Cl. Leicknam ◽  
M. Wulff ◽  
D. Khakhulin
Keyword(s):  
Low Energy ◽  
Scattering Function ◽  
Convergence Factor ◽  
Small Reduction ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Low Energy Tail ◽  
Single Exponential ◽  
Ray Scattering

X-ray scattering from a liquid using the spectrum from the undulator fundamental is examined as a function of the bandwidth of the spectrum. The synchrotron-generated X-ray spectrum from an undulator is `pink',i.e.quasi-monochromatic but having a saw-tooth-shaped spectrum with a bandwidth from 1 to 15%. It is shown that features inS(q) are slightly shifted and dampened compared with strictly monochromatic data. In return, the gain in intensity is 250–500 which makes pink beams very important for time-resolved experiments. The undulator spectrum is described by a single exponential with a low-energy tail. The tail shifts features in the scattering function towards high angles and generates a small reduction in amplitude. The theoretical conclusions are compared with experiments. Ther-resolved Fourier transformed signals are discussed next. Passing fromq- tor-space requires a sin-Fourier transform. The Warren convergence factor is introduced in this calculation to suppress oscillatory artifacts from the finiteqMin the data. It is shown that the deformation ofr-resolved signals from the pink spectrum is small compared with that due to the Warren factor. Theq-resolved and ther-resolved pink signals thus behave very differently.

Estimation of Low-Energy Ion Bombardment Damage on GaAs(001) Surface by X-Ray Photoelectron Diffraction

1986 ◽  
Vol 25 (Part 1, No. 4) ◽  
pp. 538-543 ◽  
Author(s):  
Yuko Sekino ◽  
Masanori Owari ◽  
Masahiro Kudo ◽  
Yoshimasa Nihei
Keyword(s):  
Ion Bombardment ◽  
Low Energy ◽  
X Ray ◽  
Photoelectron Diffraction

Recent Optical Observations of the X-Ray Source H0139-68; an AM-Herculis Type Binary System

1982 ◽  
Vol 4 (4) ◽  
pp. 425-428
Author(s):  
A.J. Pickles ◽  
N. Visvanathan
Keyword(s):  
Binary System ◽  
Low Energy ◽  
Optical Observations ◽  
Short Time Scale ◽  
Optical Identification ◽  
Time Resolved ◽  
X Ray ◽  
Short Time ◽  
Energy Detectors ◽  
Optical Spectrophotometry

The soft X-ray source HO 139-68 was originally detected with the low energy detectors of the HEAO A-2 experiment, and confirmed by later IPC observations (Agarwal et al. 1981). The X-ray observations show flux variations in the 0.15 – 0.4 keV band of a factor of two, or timescales of a few hours, with evidence for short time-scale flickering. Following communication of the source position to us by Agarwal and Riegler, we obtained time-resolved optical spectrophotometry of a star close to the X-ray position, using the IDPCA on the MSO 1.9m telescope. The spectrophotometry and later polarisation observations confirm the optical identification and that the source is an AM-Herculis type binary system, with a late type dwarf secondary overflowing its Roche lobe in a magnetically constrained funnel onto a magnetic white dwarf (WD) primary (Visvanathan and Pickles 1982).

Core-level photoemission and near-edge x-ray absorption fine-structure studies of GaN surface under low-energy ion bombardment

2004 ◽  
Vol 95 (10) ◽  
pp. 5487-5493 ◽  
Author(s):  
Mladen Petravic ◽  
Prakash N. K. Deenapanray ◽  
Victoria A. Coleman ◽  
Ki-jeong Kim ◽  
Bongsoo Kim ◽  
...  
Keyword(s):  
Fine Structure ◽  
Ion Bombardment ◽  
Core Level ◽  
Low Energy ◽  
X Ray ◽  
Absorption Fine ◽  
X Ray Absorption

Real-time X-ray studies of the growth of Mo-seeded Si nanodots by low-energy ion bombardment

2007 ◽  
Vol 264 (1) ◽  
pp. 47-54 ◽  
Author(s):  
Gozde Ozaydin ◽  
Ahmet S. Özcan ◽  
Yiyi Wang ◽  
Karl F. Ludwig ◽  
Hua Zhou ◽  
...  
Keyword(s):  
Real Time ◽  
Ion Bombardment ◽  
Low Energy ◽  
X Ray
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