scholarly journals Influence of Pre-Ionized Plasma on the Dynamics of a Tin Laser-Triggered Discharge-Plasma

2019 ◽  
Vol 9 (23) ◽  
pp. 4981
Author(s):  
Xu ◽  
Deng ◽  
Tian ◽  
Zhao ◽  
Wang
Keyword(s):  
Steady State ◽  
Discharge Plasma ◽  
Extreme Ultraviolet ◽  
Spectral Purity ◽  
Ultraviolet Emission ◽  
X Ray ◽  
Euv Emission ◽  
Current Voltage ◽  
Steady State Time ◽  
Temperature Ranges

The effect of laser-current delay on extreme ultraviolet emission by laser-triggered discharge-plasma has been investigated. Typical waveforms for current, voltage, laser signals, and X-ray signals have been compared. Theoretical tin spectra were simulated among the electron temperature ranges from 10 to 50 eV to compare with the experimental results. The results show that longer laser-current delay time is propitious to increase the steady-state time of plasma at high temperatures, and it increases the intensity and spectral purity of 13.5 nm emission in 2% band. The 13.5 nm radiation intensity increases about 120% with the delay increasing from 0.7 to 5 μs, and the extreme ultraviolet (EUV) emission conversion efficiency (CE) increases from 0.5% to 1.1%.

scholarly journals Effect of Time Delay on Laser-Triggered Discharge Plasma for a Beyond EUV Source

Symmetry ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 658 ◽  
Author(s):  
Qiang Xu ◽  
He Tian ◽  
Yongpeng Zhao ◽  
Qi Wang
Keyword(s):  
Steady State ◽  
High Temperature ◽  
Time Delay ◽  
Radiation Intensity ◽  
Discharge Plasma ◽  
Extreme Ultraviolet ◽  
Spectral Purity ◽  
Output Intensity ◽  
Discharge Source ◽  
Steady State Time

We demonstrate the beyond extreme ultraviolet (BEUV) emission by a laser-triggered discharge source with the laser-current delay between 0.6 µs and 3 µs. The spectra at different electron temperatures are simulated theoretically, and the spectra at different laser-current delays are measured experimentally. The theoretical and experimental results show that the lower vapor velocity at longer laser-current delay time is beneficial for increasing the steady-state time of plasma at high temperature, thereby increasing the output intensity and spectral purity of 6.76 nm. The radiation intensity of 6.76 nm (0.6% bandwidth) increases about 240% when the delay increases from 0.6 to 3 μs.

X-Ray and Extreme Ultraviolet Emission from Comets

Comets II ◽  
2004 ◽  
pp. 631-644
Author(s):  
C. M. Lisse ◽  
T. E. Cravens ◽  
K. Dennerl
Keyword(s):  
Extreme Ultraviolet ◽  
Ultraviolet Emission ◽  
X Ray

scholarly journals Extreme Ultraviolet Spectroscopy of Magnetic Cataclysmic Variables

1996 ◽  
Vol 152 ◽  
pp. 309-316
Author(s):  
Frits Paerels ◽  
Min Young Hur ◽  
Christopher W. Mauche
Keyword(s):  
High Resolution ◽  
White Dwarf ◽  
Extreme Ultraviolet ◽  
Cataclysmic Variables ◽  
Ultraviolet Spectroscopy ◽  
Temperature Structure ◽  
Polar Cap ◽  
Ultraviolet Emission ◽  
X Ray ◽  
Magnetic Cataclysmic Variables

A longstanding problem in the interpretation of the X-ray and extreme ultraviolet emission from strongly magnetic cataclysmic variables can be addressed definitively with high resolution EUV spectroscopy. A detailed photospheric spectrum of the accretion-heated polar cap of the white dwarf is sensitive in principle to the temperature structure of the atmosphere. This may allow us to determine where and how the bulk of the accretion energy is thermalized. The EUVE data on AM Herculis and EF Eridani are presented and discussed in this context.

scholarly journals X-ray and extreme-ultraviolet emission from the coronae of Capella

2001 ◽  
Vol 325 (4) ◽  
pp. 1500-1510 ◽  
Author(s):  
K. J. H. Phillips ◽  
M. Mathioudakis ◽  
D. P. Huenemoerder ◽  
D. R. Williams ◽  
M. E. Phillips ◽  
...  
Keyword(s):  
Extreme Ultraviolet ◽  
Ultraviolet Emission ◽  
X Ray

scholarly journals X-Ray Selected EUV Galaxies: A Quest for the Faintest Extragalactic EUV Sources

1996 ◽  
Vol 152 ◽  
pp. 69-73
Author(s):  
Antonella Fruscione
Keyword(s):  
Extreme Ultraviolet ◽  
X Ray ◽  
The Public ◽  
Euv Emission ◽  
Sky Survey ◽  
Using Data ◽  
First Time

Using data from the public archive of the Extreme Ultraviolet Explorer (EUVE) all-sky survey, we have systematically searched for extreme ultraviolet (EUV) emission (58-174 Å, 0.07-0.21 keV) around approximately 2500 distinct positions in the sky corresponding to known X-ray emitting extragalactic sources. We find that 20 X-ray galaxies are EUV bright and were detected with significance above 4 σ during the EUVE survey: 8 are reported here for the first time (MS 0037.7−0156, Mrk 142, M 65, EXO 1128.1+6908, M 87, Mrk 507, PKS 2005–489 and 1H 2351−315.A). 68 additional galaxies are detected with a lower significance (3 < σ < 4), but the list is affected by a high percentage of spurious sources.

A Discussion on solar studies with special reference to space observations - Extreme ultraviolet emission during flares

1971 ◽  
Vol 270 (1202) ◽  
pp. 117-125 ◽  
Keyword(s):  
Extreme Ultraviolet ◽  
Suitable Model ◽  
X Rays ◽  
Radio Waves ◽  
Ultraviolet Emission ◽  
Magnetic Instability ◽  
X Ray ◽  
Time Profiles ◽  
Peak Flux ◽  
Cool Plasma

A number of time profiles are presented which show how the flux of radiation in the wavelength bands 0.1 to 0.3 nm, 0.3 to 0.9 nm, 0.8 to 1.6 nm and at 30.4 nm change during flares. The first sign of a flare is often a decrease of flux at 30.4 nm followed by an increase in the X-ray emission. In general, the higher the photon energy, the earlier the peak flux is reached, although any increase observed at 30.4 nm seems to peak before the X -ray flux. It is concluded that a model in which a mass of gas in the upper chromosphere is heated by shock waves or incident energetic particles does not explain the observations. What appears to be a more suitable model is suggested. Cool plasma from low in the chromosphere passes through a region of magnetic instability and is heated during the passage. In this way the material of the X -ray emitting region is heated to a high tem perature a little at a time. The intensity of X-rays observed in each waveband is proportional to the volume of gas produced up to that time at the corresponding tem perature. As the instability decays the gas passing through it can no longer be heated to the temperatures reached earlier and the emission of longer wavelength X-rays becomes dominant. The emission of y -rays and radio waves can also be explained

scholarly journals Discovery of X-ray and Extreme Ultraviolet Emission from Comet C/Hyakutake 1996 B2

Science ◽  
1996 ◽  
Vol 274 (5285) ◽  
pp. 205-209 ◽  
Author(s):  
C. M. Lisse ◽  
K. Dennerl ◽  
J. Englhauser ◽  
M. Harden ◽  
F. E. Marshall ◽  
...  
Keyword(s):  
Extreme Ultraviolet ◽  
Ultraviolet Emission ◽  
X Ray

Dependence of Extreme Ultraviolet Emission on Xenon Flow Rate from aZ-Pinch Discharge Plasma

2008 ◽  
Vol 47 (6) ◽  
pp. 4878-4880
Author(s):  
Chaohai Zhang ◽  
Yuanli Cheng ◽  
Sunao Katsuki ◽  
Hidenori Akiyama
Keyword(s):  
Flow Rate ◽  
Discharge Plasma ◽  
Extreme Ultraviolet ◽  
Ultraviolet Emission
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