Spectroscopic study of sources and control of impurities in TMX-U. Revision 1

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Two absolutely calibrated euv instruments have been used to study the impurity characteristics in the Tandem Mirror Experiment-Upgrade (TMX-U). One instrument is a spectrograph that measures the time histories of several impurity emission lines in a single plasma shot. The other instrument is a monochromator that measures time-resolved radial profiles of a particular impurity emission line. The common intrinsic impurities found in TMX-U are C, N, O, and Ti. It has been shown that a large fraction of oxygen and nitrogen in the plasma is associated with the neutral beams. The plasma wall is the main source of carbon. In ... continued below

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Pages: 21

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Yu, T. L.; Allen, S. L. & Moos, H. W. November 1, 1984.

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Two absolutely calibrated euv instruments have been used to study the impurity characteristics in the Tandem Mirror Experiment-Upgrade (TMX-U). One instrument is a spectrograph that measures the time histories of several impurity emission lines in a single plasma shot. The other instrument is a monochromator that measures time-resolved radial profiles of a particular impurity emission line. The common intrinsic impurities found in TMX-U are C, N, O, and Ti. It has been shown that a large fraction of oxygen and nitrogen in the plasma is associated with the neutral beams. The plasma wall is the main source of carbon. In general, the concentration of each of the impurities is low (<1%), and the power radiated by them is less than 10 kW, which is a small portion of the total input power to the plasma. The concentrations of th

Physical Description

Pages: 21

Notes

NTIS, PC A02/MF A01.

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  • 31. national vacuum symposium, Reno, NV, USA, 3 Dec 1984

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  • Other: DE85004423
  • Report No.: UCRL-90949-Rev.1
  • Report No.: CONF-841218-14
  • Grant Number: W-7405-ENG-48
  • Grant Number: AC02-76ET53006
  • Office of Scientific & Technical Information Report Number: 6041576
  • Archival Resource Key: ark:/67531/metadc1103291

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  • November 1, 1984

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  • Feb. 18, 2018, 3:59 p.m.

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  • March 20, 2018, 1:51 p.m.

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Yu, T. L.; Allen, S. L. & Moos, H. W. Spectroscopic study of sources and control of impurities in TMX-U. Revision 1, article, November 1, 1984; Baltimore, Maryland. (digital.library.unt.edu/ark:/67531/metadc1103291/: accessed December 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.