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Title: Time-Resolved Measurements of Polarized X-Ray Spectral Lines Emitted from Discharges of the Plasma-Focus Type

Abstract

The paper presents results of experimental studies of the polarization of the X-ray spectral lines observed during high-current Plasma-Focus (PF) discharges. Time-resolved measurements of the highly-ionized argon lines were performed within the MAJA-PF facility operated at 44 kJ. The detailed studies confirmed considerable differences in relative intensities of the investigated spectral lines, what could be treated as an evidence of their different polarization.

Authors:
; ;  [1];  [2]
  1. Andrzej Soltan Institute for Nuclear Studies, 05-400 Swierk (Poland)
  2. Nuclear Fusion Institute, NRC Kurchatov Institute, 123182 Moscow (Russian Federation)
Publication Date:
OSTI Identifier:
20797912
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 812; Journal Issue: 1; Conference: PLASMA 2005: International conference on research and applications of plasmas; 3. German-Polish conference on plasma diagnostics for fusion and applications; 5. French-Polish seminar on thermal plasma in space and laboratory, Opole-Turawa (Poland), 6-9 Sep 2005; Other Information: DOI: 10.1063/1.2168837; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ARGON; ELECTRIC CURRENTS; EMISSION; PLASMA DIAGNOSTICS; PLASMA FOCUS; PLASMA FOCUS DEVICES; POLARIZATION; TIME RESOLUTION; X RADIATION; X-RAY SPECTRA

Citation Formats

Jakubowski, L., Sadowski, M. J., Stanislawski, J., and Baronova, E. O. Time-Resolved Measurements of Polarized X-Ray Spectral Lines Emitted from Discharges of the Plasma-Focus Type. United States: N. p., 2006. Web. doi:10.1063/1.2168837.
Jakubowski, L., Sadowski, M. J., Stanislawski, J., & Baronova, E. O. Time-Resolved Measurements of Polarized X-Ray Spectral Lines Emitted from Discharges of the Plasma-Focus Type. United States. doi:10.1063/1.2168837.
Jakubowski, L., Sadowski, M. J., Stanislawski, J., and Baronova, E. O. Sun . "Time-Resolved Measurements of Polarized X-Ray Spectral Lines Emitted from Discharges of the Plasma-Focus Type". United States. doi:10.1063/1.2168837.
@article{osti_20797912,
title = {Time-Resolved Measurements of Polarized X-Ray Spectral Lines Emitted from Discharges of the Plasma-Focus Type},
author = {Jakubowski, L. and Sadowski, M. J. and Stanislawski, J. and Baronova, E. O.},
abstractNote = {The paper presents results of experimental studies of the polarization of the X-ray spectral lines observed during high-current Plasma-Focus (PF) discharges. Time-resolved measurements of the highly-ionized argon lines were performed within the MAJA-PF facility operated at 44 kJ. The detailed studies confirmed considerable differences in relative intensities of the investigated spectral lines, what could be treated as an evidence of their different polarization.},
doi = {10.1063/1.2168837},
journal = {AIP Conference Proceedings},
number = 1,
volume = 812,
place = {United States},
year = {Sun Jan 15 00:00:00 EST 2006},
month = {Sun Jan 15 00:00:00 EST 2006}
}
  • The correlation of the emission of polarized X-ray lines from highly-ionized argon ions and the emission of intense electron pulses has been observed. The paper presents a review of research on the polarization of the selected X-ray lines and their correlation with pulsed electron beams investigated within the MAJA-PF facility at SINS in Swierk, Poland.
  • Soft x-ray emission from a Mather-type plasma-focus device (PF-1000) operated at {approx}400 kJ was measured. The high density and temperature plasma were generated by the discharge in the deuterium-argon gas mixture in the modified (high-current) plasma-focus configuration. A spherically bent mica crystal spectrograph viewing the axial output of the pinch region was used to measure the x-ray spectra. Spatially resolved spectra including the characteristic x-ray lines of highly ionized Ar and continua were recorded by means of an x-ray film. The x-ray emission of PF-1000 device was studied at different areas of the pinch.
  • The observation of heliumlike titanium spectra with 20 ms temporal resolution during high-power injection of electron cyclotron heating (ECH) of up to 250 ms pulse length into the Doublet III tokamak is reported. The prominent lines in the spectra and the observed dielectronic satellite lines from the autoionizing lithiumlike ionization states are given. The intensity of the resonance line 1s2 1S0 - 1s 2p 1P1 is found to be extremely sensitive to the ECH power. Time-resolved line ratios are also presented. It is concluded that a significant departure from a Maxwellian distribution of electrons exists in the present ECH plasmas.more » 31 references.« less
  • Time-resolved measurements from an elliptical crystal spectrograph are used to diagnose x-ray laser experiments on a gas puff Z pinch. The elliptical spectrograph (1.2-m working distance, eccentricity 0.9586) observes the 1-keV region, covering a range of lambda/2d = 0.5 to 0.9. A thin filter (0.2 ..mu..m Al on 2 ..mu..m Kimfol) stretched across the spectrograph exit slit acts as a low-energy x-ray cutoff and as a vacuum window, allowing the detector to be at high vacuum regardless of the pressure in the experimental chamber. The detector consists of a seven-frame microchannel-plate intensifier system. A pulser is used to gate eachmore » of seven striplines on the microchannel plate, providing nanosecond resolution. With this instrument we are able to measure the pump radiation from the imploding plasma (Ne or Ar) and converter layer (Al), and to study the lasant ionization state (Ne-like Ni or Cu).« less