Time-resolved energy measurement of electron beams in fiber Z-pinch discharges

1997 ◽  
Vol 4 (2) ◽  
pp. 490-492 ◽  
Author(s):  
A. Robledo ◽  
I. H. Mitchell ◽  
R. Aliaga-Rossel ◽  
J. P. Chittenden ◽  
A. E. Dangor ◽  
...  
Keyword(s):  
Electron Beams ◽  
Energy Measurement ◽  
Time Resolved ◽  
Z Pinch

Time-resolved K-shell line spectra measurement of z-pinch plasmas

2013 ◽  
Vol 729 ◽  
pp. 322-326 ◽  
Author(s):  
Qingguo Yang ◽  
Shaotong Zhou ◽  
Guanhua Chen ◽  
Xianbin Huang ◽  
Hongchun Cai ◽  
...  
Keyword(s):  
Time Resolved ◽  
Z Pinch

scholarly journals Soft X-ray lasing at 519.7 Å in a Recombining Z-pinch Plasma

1997 ◽  
Vol 15 (4) ◽  
pp. 589-595 ◽  
Author(s):  
E. Eberl ◽  
T. Wagner ◽  
J. Jacoby ◽  
A. Tauschwitz ◽  
D.H.H. Hoffmann
Keyword(s):  
Discharge Current ◽  
Line Intensity ◽  
Gas Pressure ◽  
Time Resolved ◽  
X Ray ◽  
Pinch Plasma ◽  
Gain Length ◽  
Z Pinch ◽  
Time Resolved Measurements

This paper is reviewing the amplification of XUV radiation at 519.7 and 498.5 Å with a gain-length product of 2.5 and 2.2 for the 4f-3d and 4d-3p transition in an oxygen Z-pinch plasma. Time resolved measurements of the O VI (519.7 Å) transition were performed and the dependence of the line intensity on the discharge current and initial gas pressure is reported.

Comparison of open shutter photography and time resolved optical diagnostics on electron beams

1993 ◽  
Author(s):  
J. Santos ◽  
J.A. Antoniades ◽  
D.P. Murphy ◽  
M.C. Myers ◽  
D.J. Weidman ◽  
...  
Keyword(s):  
Electron Beams ◽  
Optical Diagnostics ◽  
Time Resolved

Space and time resolved electron density and current measurements in a dense plasma focus Z-pinch

1998 ◽  
Vol 26 (4) ◽  
pp. 1127-1137 ◽  
Author(s):  
Niansheng Qi ◽  
S.F. Fulghum ◽  
R.R. Prasad ◽  
M. Krishnan
Keyword(s):  
Electron Density ◽  
Plasma Focus ◽  
Dense Plasma ◽  
Dense Plasma Focus ◽  
Time Resolved ◽  
Space And Time ◽  
Z Pinch

Time‐resolved x‐ray crystal spectrometer for multiterawatt Z‐pinch spectroscopy

1990 ◽  
Vol 61 (10) ◽  
pp. 2804-2806 ◽  
Author(s):  
T. Nash ◽  
C. Deeney ◽  
P. D. LePell ◽  
R. Prasad ◽  
M. Krishnan
Keyword(s):  
Crystal Spectrometer ◽  
Time Resolved ◽  
X Ray ◽  
Z Pinch

scholarly journals Measurements of fast electron beams and soft X-ray emission from plasma-focus experiments

Nukleonika ◽  
2016 ◽  
Vol 61 (2) ◽  
pp. 161-167 ◽  
Author(s):  
Władysław Surała ◽  
Marek J. Sadowski ◽  
Roch Kwiatkowski ◽  
Lech Jakubowski ◽  
Jarosław Żebrowski
Keyword(s):  
Plasma Focus ◽  
Fast Electron ◽  
Hot Spots ◽  
Electron Beams ◽  
Experimental Studies ◽  
Neutron Counter ◽  
X Rays ◽  
Strong Electron ◽  
Time Resolved ◽  
X Ray

Abstract The paper reports results of the recent experimental studies of pulsed electron beams and soft X-rays in plasma-focus (PF) experiments carried out within a modified PF-360U facility at the NCBJ, Poland. Particular attention was focused on time-resolved measurements of the fast electron beams by means of two different magnetic analyzers, which could record electrons of energy ranging from about 41 keV to about 715 keV in several (6 or 8) measuring channels. For discharges performed with the pure deuterium filling, many strong electron signals were recorded in all the measuring channels. Those signals were well correlated with the first hard X-ray pulse detected by an external scintillation neutron-counter. In some of the analyzer channels, electron spikes (lasting about dozens of nanoseconds) and appearing in different instants after the current peculiarity (so-called current dip) were also recorded. For several discharges, fast ion beams, which were emitted along the z-axis and recorded with nuclear track detectors, were also investigated. Those measurements confirmed a multibeam character of the ion emission. The time-integrated soft X-ray images, which were taken side-on by means of a pinhole camera and sensitive X-ray films, showed the appearance of some filamentary structures and so-called hot spots. The application of small amounts of admixtures of different heavy noble gases, i.e. of argon (4.8% volumetric), krypton (1.6% volumetric), or xenon (0.8% volumetric), decreased intensity of the recorded electron beams, but increased intensity of the soft X-ray emission and showed more distinct and numerous hot spots. The recorded electron spikes have been explained as signals produced by quasi-mono-energetic microbeams emitted from tiny sources (probably plasma diodes), which can be formed near the observed hot spots.

scholarly journals Spectral Line Intensities for Δ N = 0 (L-Shell) Transitions of N, O, and F-Like Ions

1984 ◽  
Vol 86 ◽  
pp. 258-261
Author(s):  
Y.T. Lee ◽  
K. Reed
Keyword(s):  
High Temperature ◽  
Spectral Line ◽  
Wavelength Range ◽  
Argon Plasma ◽  
Rate Coefficients ◽  
Time Resolved ◽  
High Power Lasers ◽  
Line Intensities ◽  
Radiation Spectra ◽  
Z Pinch

Many laboratories are actively investigating radiation spectra emitted from high temperature/high density plasmas produced using gas-puff Z-pinch machines and high power lasers. Spectral-line intensities from these plasmas can be useful temperature and density diagnostics. In a well-diagnosed plasma, information on the emission spectrum can also be used to test the accuracy of theoretical rate coefficients.Recently time-resolved spectra from an oxygen-like argon plasma produced in a gas-puff z-pinch were measured in the wavelength range 150–200 Å . Over this wavelength range the spectrum contains mostly the Δn = 0 (L-shell) transitions in ArX-ArXIV and some weak transitions for n = 3 to n = 4 of ArVI-ArVIII. The measured spectra show the predominance of 0-like Ar L-shell transitions.

scholarly journals Pulsed-power-generated plasma of high reproducibility

1990 ◽  
Vol 8 (4) ◽  
pp. 595-608 ◽  
Author(s):  
H. Kunze ◽  
R. Noll ◽  
C. R. Haas ◽  
M. Elfers ◽  
J. Hertzberg ◽  
...  
Keyword(s):  
Electron Density ◽  
Ion Beam ◽  
Pulsed Power ◽  
High Reproducibility ◽  
Time Resolved ◽  
Beam Plasma ◽  
Plasma State ◽  
Average Electron ◽  
Z Pinch ◽  
Better Than

Plasmas of high reproducibility that are suitable for beam-plasma experiments are generated by a pulsed-power z-pinch discharge. The z-pinch device is designed as a plasma target for the investigation of ion beam-plasma interactions. The dynamic plasma state is characterized by the electron density, the electron temperature, and the magnetic field distribution, which are observed using time-resolved diagnostics. For z-pinch discharges in hydrogen, average electron densities of up to (2.6 ± 0.1) × 1018 electrons/cm3 were measured interferometrically. Electron temperatures in the range 2–7 eV are determined by time-resolved spectroscopy. The reproducibility of the electron density of the z-pinch discharge in terms of shot-to-shot fluctuations is estimated to be better than 3%. This is a favorable condition for performing beam-plasma experiments.

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