X-Ray Spectra from H-, He- and Li-Like Iron Ions in a Vacuum Spark Plasma

1983 ◽  
Vol 52 (6) ◽  
pp. 1957-1968 ◽  
Author(s):  
Shigeru Morita ◽  
Junji Fujita
Keyword(s):  
Iron Ions ◽  
X Ray ◽  
Spark Plasma ◽  
Vacuum Spark

X-ray spectra of Ne-like Ba, La, Ce, and Pr ions

1984 ◽  
Vol 62 (12) ◽  
pp. 1924-1927 ◽  
Author(s):  
E. V. Aglitsky ◽  
P. S. Antsiferov ◽  
S. L. Mandelstam ◽  
A. M. Panin
Keyword(s):  
Image Intensifier ◽  
X Ray ◽  
Spark Plasma ◽  
First Time ◽  
Vacuum Spark

The spectra of Ne-like ions of Ba, La, Ce, and Pr in the 1.9 – 2.7 Å region, excited in the low-inductance vacuum spark plasma, have been obtained for the first time. A Johann's crystal spectrograph in combination with an image intensifier was used for recording the spectra. The 2s22p6 – 2s2p63p and 2s22p6 – 2s22p53d transitions have been identified in these ions along with the satellite lines of Na-like and Mg-like Ba–Pr ions.

Investigation of the Temporal Evolution of X-Ray Emission From a Copper Vacuum Spark Plasma

2012 ◽  
Vol 40 (12) ◽  
pp. 3390-3394 ◽  
Author(s):  
Solmaz Saboohi ◽  
Seong Ling Yap ◽  
L. S. Chan ◽  
Chiow San Wong
Keyword(s):  
Temporal Evolution ◽  
X Ray ◽  
Spark Plasma ◽  
Vacuum Spark

X-ray and EUV Emission Studies of Copper Vacuum Spark Plasma

2010 ◽  
Author(s):  
L. S. Chan ◽  
M. Ghomeishi ◽  
S. L. Yap ◽  
C. S. Wong ◽  
A. K. Yahya ◽  
...  
Keyword(s):  
X Ray ◽  
Euv Emission ◽  
Spark Plasma ◽  
Emission Studies ◽  
Vacuum Spark

scholarly journals A low energy tunable pulsed X-ray source based on the pseudospark electron beam

2007 ◽  
Vol 25 (3) ◽  
pp. 497-502 ◽  
Author(s):  
C.S. Wong ◽  
H.J. Woo ◽  
S.L. Yap
Keyword(s):  
Electron Beam ◽  
Biological Sample ◽  
Production Efficiency ◽  
Line Emission ◽  
Electrical Energy ◽  
Low Energy ◽  
Characteristic Line ◽  
X Ray ◽  
Spark Plasma ◽  
Vacuum Spark

A low energy pulsed X-ray source with 17 J electrical input energy has been constructed based on the vacuum spark configuration triggered by the pseudospark electron beam. With such a low input electrical energy, the frequently studied X-ray emitting vacuum spark plasma is not obtained. Instead, this configuration gives rise to a point-like electron beam-target pulsed X-ray source at the tip of the anode. Emission of X-ray is observed during the pre-breakdown phase. The X-ray spectrum is dominated by the characteristic line emission of the anode material. The total X-ray energy emission from the source can be estimated by assuming it to be a monochromatic point source. It is found to have an X-ray production efficiency of 0.1%, giving an average X-ray dosage of 18 mGy per pulse. X-ray radiography of small biological sample is demonstrated to illustrate a potential application of the present X-ray source.

Electron density measurement of a pre-pinched vacuum spark plasma using soft X-ray titanium and vanadium emission

1989 ◽  
Vol 22 (7) ◽  
pp. 1133-1143 ◽  
Author(s):  
M Finkenthal ◽  
D Stutman ◽  
P Mandelbaum ◽  
A L Osterheld ◽  
M H Chen
Keyword(s):  
Electron Density ◽  
Density Measurement ◽  
X Ray ◽  
Spark Plasma ◽  
Vacuum Spark

Development of WC-Fe3Al Composites by Spark Plasma Sintering Process

2016 ◽  
Vol 881 ◽  
pp. 307-312
Author(s):  
Luis Antonio C. Ybarra ◽  
Afonso Chimanski ◽  
Sergio Gama ◽  
Ricardo A.G. da Silva ◽  
Izabel Fernanda Machado ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Zinc Stearate ◽  
Sintering Process ◽  
X Ray Diffraction ◽  
X Ray ◽  
Plasma Sintering ◽  
Al Composite ◽  
Spark Plasma ◽  
Short Time ◽  
Vibration Mill

Tungsten carbide (WC) based composites are usually produced with cobalt, but this binder has the inconvenience of shortage, unstable price and potential carcinogenicity. The objective of this study was to develop WC composite with intermetallic Fe3Al matrix. Powders of WC, iron and aluminum, with composition WC-10 wt% Fe3Al, and 0.5 wt% zinc stearate were milled in a vibration mill for 6 h and sintered in a SPS (spark plasma sintering) furnace at 1150 °C for 8 min under pressure of 30 MPa. Measured density and microstructure analysis showed that the composite had significant densification during the (low-temperature, short time) sintering, and X-ray diffraction analysis showed the formation of intermetallic Fe3Al. Analysis by Vickers indentation resulted in hardness of 11.2 GPa and fracture toughness of 24.6 MPa.m1/2, showing the feasibility of producing dense WC-Fe3Al composite with high mechanical properties using the SPS technique.

Effects of experimental parameters on EUV emitted from tin vacuum spark plasma

2014 ◽  
Author(s):  
Solmaz Saboohi ◽  
S. L. Yap ◽  
L. S. Chan ◽  
C. S. Wong
Keyword(s):  
Experimental Parameters ◽  
Spark Plasma ◽  
Vacuum Spark

Non-uniform distribution of dopant iron ions in TiO2 nanocrystals probed by X-ray diffraction, Raman scattering, photoluminescence and photocatalysis

2015 ◽  
Vol 3 (8) ◽  
pp. 1846-1853 ◽  
Author(s):  
S. Manu ◽  
M. Abdul Khadar
Keyword(s):  
Raman Scattering ◽  
Uniform Distribution ◽  
Semiconductor Nanocrystals ◽  
Iron Ions ◽  
X Ray Diffraction ◽  
Tio2 Nanocrystals ◽  
X Ray ◽  
Practical Applications ◽  
Mechanism Operative

The phenomenon of ‘self-purification’ is a real mechanism operative in nanocrystals and this should be taken into account while doping semiconductor nanocrystals with external impurities for practical applications.

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