Electron density of the prepinched phase of a cerium (Z=58) vacuum spark plasma obtained from line emission measurements around 1 keV

1989 ◽  
Vol 65 (10) ◽  
pp. 3786-3789 ◽  
Author(s):  
M. Finkenthal ◽  
D. Stutman ◽  
A. Bar Shalom
Keyword(s):  
Electron Density ◽  
Line Emission ◽  
Spark Plasma ◽  
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

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

Transient Light Emissions from a Laser Perturbed Plasma

1972 ◽  
Vol 50 (19) ◽  
pp. 2338-2347 ◽  
Author(s):  
H. A. Baldis ◽  
R. A. Nodwell ◽  
J. Meyer
Keyword(s):  
Laser Pulse ◽  
Electron Density ◽  
Laser Light ◽  
Line Emission ◽  
Argon Plasma ◽  
Stark Broadening ◽  
Excited Atoms ◽  
Electron Density Gradient ◽  
Transient Plasma ◽  
The Continuum

The interaction between a 20 MW Q-switched ruby laser pulse and a partially ionized argon plasma has been studied experimentally. When the focused laser pulse is fired into the plasma, a transient emission from the plasma may be observed both in the continuum and line emission. From measurements of the absolute intensities of this transient radiation, estimates have been made of the population density of the excited atoms and of the electron densities. The Stark broadening of the Ar II lines has also been measured to obtain the electron density in the transient plasma and data obtained in this way are consistent with those obtained from the continuum radiation. During the time when the laser light is incident on the plasma the Ar II lines show a strong asymmetry which disappears quickly after the laser pulse has terminated. This asymmetry can be explained in terms of the electron density gradient present in the expanding perturbed plasma.

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.

Space Resolved Measurements of the Emission of Intermediate and High Ionization States Obtained from Vacuum Spark Plasmas Using Xuv Multilayer Mirrors and a RbAP Crystal

1988 ◽  
Vol 102 ◽  
pp. 87-90
Author(s):  
M. Finkenthal ◽  
D. Stutman ◽  
J.L. Schwob ◽  
J.H. Underwood
Keyword(s):  
Spatial Extent ◽  
High Current ◽  
Plasma Region ◽  
Multilayer Mirrors ◽  
Plasma Pinch ◽  
High Ionization ◽  
Extended Plasma ◽  
Spark Plasma ◽  
Vacuum Spark

AbstractThe spatial extent of the regions from which lines of the Intermediate, NeI-like and high Li I-llke Ionization states of Ti, V, Fe, Co, and Ni, are emitted in a low inductance high-current vacuum spark plasma, has been determined using multilayer mirrors and a RbAP crystal. The spectra have been recorded in the 10–30 Å range. The main conclusion of the present work is that the intermediate ionization states are emitted from an extended plasma region, of the order of 200 microns, while the highly ionized states are formed, as it has been previously stated, In the minute plasma pinch.

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

The Parameters of the Ion Flow of Vacuum-Spark Plasma

2009 ◽  
Vol 37 (8) ◽  
pp. 1499-1503 ◽  
Author(s):  
I.L. Muzukin ◽  
I.V. Uimanov ◽  
Y.A. Zemskov
Keyword(s):  
Ion Flow ◽  
Spark Plasma ◽  
Vacuum Spark
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