Extreme Ultraviolet And Soft X Ray Diagnostics Of High Temperature Plasmas Progress Report
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Extreme Ultraviolet And Soft X Ray Diagnostics Of High Temperature Plasmas Progress Report
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Author :
language : en
Publisher:
Release Date : 1986
Extreme Ultraviolet And Soft X Ray Diagnostics Of High Temperature Plasmas Progress Report written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
This report describes recent progress and plans for calendar year 1987 in the Johns Hopkins University program to develop and improve spectroscopic diagnostics for the high temperature plasmas used in magnetic fusion research. An EUV spectrograph which provides time resolved spectra along fifteen chords of a plasma device has been completed and evaluation on DIII-D will began in late 1986. Other instrumentation work includes the evaluation of a sensitive detector for ion temperature/velocity distribution determinations and a feasibility study of Zeeman polarimetry for determining magnetic fields. A comprehensive data set taken on the TEXT tokamak is undergoing analysis as a means of improving the ionic parameters used in diagnostic studies and to expand the capabilities of existing instruments. Potential new advanced in spectroscopic technology are being monitored to determine if they provide advantages for fusion research.
Extreme Ultraviolet And Soft X Ray Diagnostics Of High Temperature Plasmas Annual Progress Report
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Author :
language : en
Publisher:
Release Date : 1980
Extreme Ultraviolet And Soft X Ray Diagnostics Of High Temperature Plasmas Annual Progress Report written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with categories.
The work performed from mid-January 1979 through 1980 is described. EUV diagnostic studies have been performed at the Alcator A and C Tokamaks, and on TMX. A toroidal asymmetry has been found in the low density phase of Alcator A. The confinement time of impurities has been measured on Alcator A. Impurity concentrations in the center cell of TMX have been studied using EUV spectroscopic techniques. A time resolving spectrograph with 1024 detector elements is essentially complete.
Extreme Ultraviolet And Soft X Ray Diagnostics Of High Temperature Plasmas Annual Progress Report October 1 1980 September 30 1981
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Author :
language : en
Publisher:
Release Date : 1981
Extreme Ultraviolet And Soft X Ray Diagnostics Of High Temperature Plasmas Annual Progress Report October 1 1980 September 30 1981 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with categories.
The work performed from May 1980 through March 1981 is described. EUV diagnostic studies have been performed at the Alcator A, Alcator C and TFR 600 tokamaks and on TMX. The central molybdenum concentration in Alcator C has been shown to be much lower than that in Alcator A. Impurity concentration and radiative power losses have been determined in the center cell of TMX. A grazing incidence spectrograph with 1024 detector elements is under construction.
Extreme Ultraviolet And Soft X Ray Diagnostics Of High Temperature Plasmas Annual Progress Report June 1 1976 May 31 1977
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Author :
language : en
Publisher:
Release Date : 1977
Extreme Ultraviolet And Soft X Ray Diagnostics Of High Temperature Plasmas Annual Progress Report June 1 1976 May 31 1977 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with categories.
The results of the research program at this laboratory from mid February 1976 until January 31, 1977, are described. The four major research areas of the program: diagnostic studies of magnetically confined high temperature plasmas, supporting laboratory studies, theoretical studies of highly ionized atoms, and instrument development are discussed. Spatially resolved ultraviolet measurements on Elmo Bumpy Torus have determined impurity confinement times. The measured oxygen densities and fluxes are being determined at Alcator; the spectroscopic studies show that hydrogen discharges in this tokamak have an effective Z close to one. A laboratory study of the Penning discharge between 100 and 300 A shows that it is a bright source for evaluation of EUV diagnostic instrumentation. Design of a multispatial element spectrometer system is complete and construction has begun. A spectrophotometer compatible with both types of facilities is available for absolute intensity calibration transfer from the NBS SURF II facility to ERDA plasma facilities. Computer programs needed for relativistic calculation of transition probabilities and wavelengths have been completed and applied to calculations in the Li, Be, Ar, and K isoelectronic sequences.
Extreme Ultraviolet And Soft X Ray Diagnostics Of High Temperature Plasmas Annual Progress Report June 1 1977 May 31 1978
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Author :
language : en
Publisher:
Release Date : 1978
Extreme Ultraviolet And Soft X Ray Diagnostics Of High Temperature Plasmas Annual Progress Report June 1 1977 May 31 1978 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with categories.
Spatial scans of Alcator Tokamak have led to a more direct determination of the oxygen and nitrogen concentrations. These scans have also shown that grad B and curvature drifts are significant transport mechanisms in this device. Spatial scans of Elmo Bumpy Torus from both the top and the side have produced two dimensional plots of the impurity concentrations. Preliminary results from 2XIIB show that oxygen is the dominant impurity; nitrogen, carbon, and titanium are also present. The Spatial Imaging Detector System is discussed; construction is complete and it is being prepared for installation on a plasma machine. EUV photometric calibration techiques at this laboratory are described. The accuracy and stability of this calibration is discussed. Theoretical calculations of relativistic transition rates and energies have continued, and studies of electron-impact ionization and excitation cross sections have begun.
Extreme Ultraviolet And Soft X Ray Diagnostics Of High Temperature Plasmas Annual Progress Report June 1 1975 May 31 1976
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Author :
language : en
Publisher:
Release Date : 1976
Extreme Ultraviolet And Soft X Ray Diagnostics Of High Temperature Plasmas Annual Progress Report June 1 1975 May 31 1976 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with categories.
The report discusses the four major research areas of this program: diagnostic studies of CTR plasmas, laboratory spectroscopy and calibration at short wavelengths, theoretical computation of transition probabilities for highly ionized atoms, and instrument development for short wavelength studies of CTR devices. Using existing instruments, diagnostic studies are under way at Versator and Elmo Bumpy Torus. A facility has been completed for the sensitivity calibration of spectrometers down to 300 A as complete units. The development of computer programs necessary for transition probability calculations is ninety percent complete. An f/20 forty cm focal length concave grating spectrometer has been constructed utilizing very high vacuum techniques to reduce contamination of plasma devices and calibration sources such as SURF II at NBS. New designs for grazing incidence monochromators have been developed.
Extreme Ultraviolet And Soft X Ray Diagnostics Of High Temperature Plasmas
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Author :
language : en
Publisher:
Release Date : 1986
Extreme Ultraviolet And Soft X Ray Diagnostics Of High Temperature Plasmas written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
This report describes recent progress and plans for calendar year 1987 in the Johns Hopkins University program to develop and improve spectroscopic diagnostics for the high temperature plasmas used in magnetic fusion research. An EUV spectrograph which provides time resolved spectra along fifteen chords of a plasma device has been completed and evaluation on DIII-D will began in late 1986. Other instrumentation work includes the evaluation of a sensitive detector for ion temperature/velocity distribution determinations and a feasibility study of Zeeman polarimetry for determining magnetic fields. A comprehensive data set taken on the TEXT tokamak is undergoing analysis as a means of improving the ionic parameters used in diagnostic studies and to expand the capabilities of existing instruments. Potential new advanced in spectroscopic technology are being monitored to determine if they provide advantages for fusion research.
Energy Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1992
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Power resources categories.
Fusion Energy Update
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Author :
language : en
Publisher:
Release Date : 1979
Fusion Energy Update written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Controlled fusion categories.
Nuclear Science Abstracts
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Author :
language : en
Publisher:
Release Date : 1976
Nuclear Science Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Nuclear energy categories.