Abstract

Charge transfer from hydrogen atoms having energies below 35 keV to fully ionized low-Z impurities takes place predominantly in two excited levels. It is shown that the subsequent radiative cascades from C5+, N6+; and O7+ can be used to obtain the relative response of grazing incidence spectrometer systems in the region between 102 and 1164 Å. In principle, the technique can be extended to 19 Å. The method is useful in plasma devices employing neutral beams for heating or for diagnostic probing. The absolute sensitivity of a system is then established by normalizing to only one branching ratio measurement from a pair of lines having accurately known transition probabilities. Results from the Impurity Studies Experiment-B (ISX-B) tokamak are presented.

© 1985 Optical Society of America

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  1. L. R. Canfield, R. G. Johnstone, R. P. Madden, “NBS Detector Standard for the Far UV,” Appl. Opt. 12, 1611 (1973).
    [CrossRef] [PubMed]
  2. E. Hinnov, “Highly Ionized Atoms in Tokamak Discharges,” Phys. Rev. 14, 1533 (1976).
    [CrossRef]
  3. M. Shiho, S. Konoshima, A. Funahashi, S. Kasai, T. Sugie, N. Suzuki, M. Shimada, N. Fujisawa, “Spectroscopic Study of Impurities in the JFT-2 Tokamak,” Nucl. Fusion 18, 1705 (1978).
    [CrossRef]
  4. V. V. Afrosimov, Yu. S. Gordeev, A. N. Zimovev, A. A. Korotov, Fiz. Plazmy 5, 981 (1979)[“Light-Impurity Diagnostics in the T-4 Tokamak,” Sov. J. Plasma Phys. 5, 551 (1979)].
  5. A. N. Zimovev, A. A. Korotko, E. R. Krzhizhnovskii, V. V. Aforsimov, Yu. S. Gordeev, Pis'ma Zh. Eksp. Teor. Fiz. 32, 557 (1980)[“Radial Distribution of the Concentration of Oxygen Nuclei in the Plasma of the T-10 Tokamak,” JETP Lett. 32, 539 (1980)].
  6. R. C. Isler, L. E. Murray, S. Kasai, J. L. Dunlap, S. C. Bates, P. H. Edmonds, E. A. Lazarus, C. H. Ma, M. Murakami, “Charge-Exchange Excitation and Recombination of Oxygen in the ISX-B Tokamak,” Phys. Rev. A 24, 2701 (1981).
    [CrossRef]
  7. R. J. Fonck, M. Finkenthal, R. J. Goldston, D. L. Herndon, R. A. Hulse, R. Kaita, D. D. Meyerhofer, “Spatially Resolved Measurements of Fully Ionized Low-Z Impurities in the PDX Tokamak,” Phys. Rev. Lett. 49, 737 (1982).
    [CrossRef]
  8. R. C. Isler, L. E. Murray, “Plasma Rotation Measurements using Spectral Lines from Charge Transfer Reactions,” Appl. Phys. Lett 42, 355 (1983).
    [CrossRef]
  9. H. A. Bethe, E. E. Saltpeter, Quantum Mechanics of One- and Two-Electron Atoms (Springer, Berlin, 1957).
  10. W. L. Wiese, M. W. Smith, B. M. Glennon, Atomic Transition Probabilities, NSRDS-NBS 4 (U.S. Government Printing Office, Washington, D.C., 1966), Vol. 1.
  11. T. A. Green, E. J. Shipsey, J. C. Browne, “Modified Method of Perturbed Stationary States. IV. Electron Capture Cross Sections for the Reaction C6+ + H(1S) → C5+(n,l) + H+,” Phys. Rev. A 25, 1364 (1982).
    [CrossRef]
  12. E. J. Shipsey, T. A. Green, J. C. Browne, “Modified Method of Perturbed Stationary States. V. Electron Capture Cross Sections for the Reaction O8+ + H(1S) → O7+(n,l) + H+,” Phys. Rev. A 27, 821 (1983).
    [CrossRef]
  13. A Salop, “The Distribution of Excitation Resulting from Electron Capture in Stripped-Ion-Hydrogen-Atom Collisions,” J. Phys. B 12, 919 (1979).
    [CrossRef]
  14. R. E. Olson, “n,l Distributions in A8+ + H Electron-Capture Collisions,” Phys. Rev. A 24, 1726 (1981).
    [CrossRef]
  15. V. A. Abramov, F. F. Baryshnikov, V. S. Lisitsa, Zh. Eksper. Teor. Fiz. 27, 494 (1978)[“Change of Intensity of Spectral Lines of Multiply Charged Ions as a Result of Charge Exchange with Atom Hydrogen,” Sov. Phys. JETP 27, 464 (1978)] and private communication.
  16. R. J. Fonck, D. S. Darrow, K. P. Jaehnig, “Determination of Plasma-Ion Velocity Distribution via Charge-Exchange Recombination Spectroscopy,” Phys. Rev. A 29, 3288 (1984).
    [CrossRef]
  17. K. Omidvar, “Transition Probabilities, Life Times, and Branching Ratios in Hydrogen-like Atoms in the Linear Stark Effect,” At. Data Nucl. Tables 28, 215 (1983).
    [CrossRef]
  18. G. A. Hallock et al., “Plasma Space Potential Measurements on ISX-B,” in Proceedings, IEEE Conference on Plasma Science (IEEE, New York, 1984).
  19. R. C. Isler, Nucl. Instrum. Methods (1985), to be published.
  20. R. C. Isler, “Profiles and Polarizations of the Balmer-α Line from High Temperature Hydrogen Atoms in Strong Magnetic Fields,” Phys. Rev. A 14, 1015 (1976).
    [CrossRef]
  21. D. H. Sampson, “On Statistical Equilibrium Among the Sublevels of Hydrogenic Atoms and Ions,” J. Phys. B 10, 749 (1977).
    [CrossRef]
  22. R. E. Olson, Department of Physics, University of Missouri; private communication.
  23. J. E. Mack, F. Paresce, S. Bowyer, “Channel Electron Multiplier: Its Quantum Efficiency at Soft X-Ray and Vacuum Ultraviolet Wavelengths,” Appl. Opt. 15, 861 (1976).
    [CrossRef] [PubMed]

1984

R. J. Fonck, D. S. Darrow, K. P. Jaehnig, “Determination of Plasma-Ion Velocity Distribution via Charge-Exchange Recombination Spectroscopy,” Phys. Rev. A 29, 3288 (1984).
[CrossRef]

1983

K. Omidvar, “Transition Probabilities, Life Times, and Branching Ratios in Hydrogen-like Atoms in the Linear Stark Effect,” At. Data Nucl. Tables 28, 215 (1983).
[CrossRef]

E. J. Shipsey, T. A. Green, J. C. Browne, “Modified Method of Perturbed Stationary States. V. Electron Capture Cross Sections for the Reaction O8+ + H(1S) → O7+(n,l) + H+,” Phys. Rev. A 27, 821 (1983).
[CrossRef]

R. C. Isler, L. E. Murray, “Plasma Rotation Measurements using Spectral Lines from Charge Transfer Reactions,” Appl. Phys. Lett 42, 355 (1983).
[CrossRef]

1982

T. A. Green, E. J. Shipsey, J. C. Browne, “Modified Method of Perturbed Stationary States. IV. Electron Capture Cross Sections for the Reaction C6+ + H(1S) → C5+(n,l) + H+,” Phys. Rev. A 25, 1364 (1982).
[CrossRef]

R. J. Fonck, M. Finkenthal, R. J. Goldston, D. L. Herndon, R. A. Hulse, R. Kaita, D. D. Meyerhofer, “Spatially Resolved Measurements of Fully Ionized Low-Z Impurities in the PDX Tokamak,” Phys. Rev. Lett. 49, 737 (1982).
[CrossRef]

1981

R. C. Isler, L. E. Murray, S. Kasai, J. L. Dunlap, S. C. Bates, P. H. Edmonds, E. A. Lazarus, C. H. Ma, M. Murakami, “Charge-Exchange Excitation and Recombination of Oxygen in the ISX-B Tokamak,” Phys. Rev. A 24, 2701 (1981).
[CrossRef]

R. E. Olson, “n,l Distributions in A8+ + H Electron-Capture Collisions,” Phys. Rev. A 24, 1726 (1981).
[CrossRef]

1980

A. N. Zimovev, A. A. Korotko, E. R. Krzhizhnovskii, V. V. Aforsimov, Yu. S. Gordeev, Pis'ma Zh. Eksp. Teor. Fiz. 32, 557 (1980)[“Radial Distribution of the Concentration of Oxygen Nuclei in the Plasma of the T-10 Tokamak,” JETP Lett. 32, 539 (1980)].

1979

V. V. Afrosimov, Yu. S. Gordeev, A. N. Zimovev, A. A. Korotov, Fiz. Plazmy 5, 981 (1979)[“Light-Impurity Diagnostics in the T-4 Tokamak,” Sov. J. Plasma Phys. 5, 551 (1979)].

A Salop, “The Distribution of Excitation Resulting from Electron Capture in Stripped-Ion-Hydrogen-Atom Collisions,” J. Phys. B 12, 919 (1979).
[CrossRef]

1978

V. A. Abramov, F. F. Baryshnikov, V. S. Lisitsa, Zh. Eksper. Teor. Fiz. 27, 494 (1978)[“Change of Intensity of Spectral Lines of Multiply Charged Ions as a Result of Charge Exchange with Atom Hydrogen,” Sov. Phys. JETP 27, 464 (1978)] and private communication.

M. Shiho, S. Konoshima, A. Funahashi, S. Kasai, T. Sugie, N. Suzuki, M. Shimada, N. Fujisawa, “Spectroscopic Study of Impurities in the JFT-2 Tokamak,” Nucl. Fusion 18, 1705 (1978).
[CrossRef]

1977

D. H. Sampson, “On Statistical Equilibrium Among the Sublevels of Hydrogenic Atoms and Ions,” J. Phys. B 10, 749 (1977).
[CrossRef]

1976

J. E. Mack, F. Paresce, S. Bowyer, “Channel Electron Multiplier: Its Quantum Efficiency at Soft X-Ray and Vacuum Ultraviolet Wavelengths,” Appl. Opt. 15, 861 (1976).
[CrossRef] [PubMed]

R. C. Isler, “Profiles and Polarizations of the Balmer-α Line from High Temperature Hydrogen Atoms in Strong Magnetic Fields,” Phys. Rev. A 14, 1015 (1976).
[CrossRef]

E. Hinnov, “Highly Ionized Atoms in Tokamak Discharges,” Phys. Rev. 14, 1533 (1976).
[CrossRef]

1973

Abramov, V. A.

V. A. Abramov, F. F. Baryshnikov, V. S. Lisitsa, Zh. Eksper. Teor. Fiz. 27, 494 (1978)[“Change of Intensity of Spectral Lines of Multiply Charged Ions as a Result of Charge Exchange with Atom Hydrogen,” Sov. Phys. JETP 27, 464 (1978)] and private communication.

Aforsimov, V. V.

A. N. Zimovev, A. A. Korotko, E. R. Krzhizhnovskii, V. V. Aforsimov, Yu. S. Gordeev, Pis'ma Zh. Eksp. Teor. Fiz. 32, 557 (1980)[“Radial Distribution of the Concentration of Oxygen Nuclei in the Plasma of the T-10 Tokamak,” JETP Lett. 32, 539 (1980)].

Afrosimov, V. V.

V. V. Afrosimov, Yu. S. Gordeev, A. N. Zimovev, A. A. Korotov, Fiz. Plazmy 5, 981 (1979)[“Light-Impurity Diagnostics in the T-4 Tokamak,” Sov. J. Plasma Phys. 5, 551 (1979)].

Baryshnikov, F. F.

V. A. Abramov, F. F. Baryshnikov, V. S. Lisitsa, Zh. Eksper. Teor. Fiz. 27, 494 (1978)[“Change of Intensity of Spectral Lines of Multiply Charged Ions as a Result of Charge Exchange with Atom Hydrogen,” Sov. Phys. JETP 27, 464 (1978)] and private communication.

Bates, S. C.

R. C. Isler, L. E. Murray, S. Kasai, J. L. Dunlap, S. C. Bates, P. H. Edmonds, E. A. Lazarus, C. H. Ma, M. Murakami, “Charge-Exchange Excitation and Recombination of Oxygen in the ISX-B Tokamak,” Phys. Rev. A 24, 2701 (1981).
[CrossRef]

Bethe, H. A.

H. A. Bethe, E. E. Saltpeter, Quantum Mechanics of One- and Two-Electron Atoms (Springer, Berlin, 1957).

Bowyer, S.

Browne, J. C.

E. J. Shipsey, T. A. Green, J. C. Browne, “Modified Method of Perturbed Stationary States. V. Electron Capture Cross Sections for the Reaction O8+ + H(1S) → O7+(n,l) + H+,” Phys. Rev. A 27, 821 (1983).
[CrossRef]

T. A. Green, E. J. Shipsey, J. C. Browne, “Modified Method of Perturbed Stationary States. IV. Electron Capture Cross Sections for the Reaction C6+ + H(1S) → C5+(n,l) + H+,” Phys. Rev. A 25, 1364 (1982).
[CrossRef]

Canfield, L. R.

Darrow, D. S.

R. J. Fonck, D. S. Darrow, K. P. Jaehnig, “Determination of Plasma-Ion Velocity Distribution via Charge-Exchange Recombination Spectroscopy,” Phys. Rev. A 29, 3288 (1984).
[CrossRef]

Dunlap, J. L.

R. C. Isler, L. E. Murray, S. Kasai, J. L. Dunlap, S. C. Bates, P. H. Edmonds, E. A. Lazarus, C. H. Ma, M. Murakami, “Charge-Exchange Excitation and Recombination of Oxygen in the ISX-B Tokamak,” Phys. Rev. A 24, 2701 (1981).
[CrossRef]

Edmonds, P. H.

R. C. Isler, L. E. Murray, S. Kasai, J. L. Dunlap, S. C. Bates, P. H. Edmonds, E. A. Lazarus, C. H. Ma, M. Murakami, “Charge-Exchange Excitation and Recombination of Oxygen in the ISX-B Tokamak,” Phys. Rev. A 24, 2701 (1981).
[CrossRef]

Finkenthal, M.

R. J. Fonck, M. Finkenthal, R. J. Goldston, D. L. Herndon, R. A. Hulse, R. Kaita, D. D. Meyerhofer, “Spatially Resolved Measurements of Fully Ionized Low-Z Impurities in the PDX Tokamak,” Phys. Rev. Lett. 49, 737 (1982).
[CrossRef]

Fonck, R. J.

R. J. Fonck, D. S. Darrow, K. P. Jaehnig, “Determination of Plasma-Ion Velocity Distribution via Charge-Exchange Recombination Spectroscopy,” Phys. Rev. A 29, 3288 (1984).
[CrossRef]

R. J. Fonck, M. Finkenthal, R. J. Goldston, D. L. Herndon, R. A. Hulse, R. Kaita, D. D. Meyerhofer, “Spatially Resolved Measurements of Fully Ionized Low-Z Impurities in the PDX Tokamak,” Phys. Rev. Lett. 49, 737 (1982).
[CrossRef]

Fujisawa, N.

M. Shiho, S. Konoshima, A. Funahashi, S. Kasai, T. Sugie, N. Suzuki, M. Shimada, N. Fujisawa, “Spectroscopic Study of Impurities in the JFT-2 Tokamak,” Nucl. Fusion 18, 1705 (1978).
[CrossRef]

Funahashi, A.

M. Shiho, S. Konoshima, A. Funahashi, S. Kasai, T. Sugie, N. Suzuki, M. Shimada, N. Fujisawa, “Spectroscopic Study of Impurities in the JFT-2 Tokamak,” Nucl. Fusion 18, 1705 (1978).
[CrossRef]

Glennon, B. M.

W. L. Wiese, M. W. Smith, B. M. Glennon, Atomic Transition Probabilities, NSRDS-NBS 4 (U.S. Government Printing Office, Washington, D.C., 1966), Vol. 1.

Goldston, R. J.

R. J. Fonck, M. Finkenthal, R. J. Goldston, D. L. Herndon, R. A. Hulse, R. Kaita, D. D. Meyerhofer, “Spatially Resolved Measurements of Fully Ionized Low-Z Impurities in the PDX Tokamak,” Phys. Rev. Lett. 49, 737 (1982).
[CrossRef]

Gordeev, Yu. S.

A. N. Zimovev, A. A. Korotko, E. R. Krzhizhnovskii, V. V. Aforsimov, Yu. S. Gordeev, Pis'ma Zh. Eksp. Teor. Fiz. 32, 557 (1980)[“Radial Distribution of the Concentration of Oxygen Nuclei in the Plasma of the T-10 Tokamak,” JETP Lett. 32, 539 (1980)].

V. V. Afrosimov, Yu. S. Gordeev, A. N. Zimovev, A. A. Korotov, Fiz. Plazmy 5, 981 (1979)[“Light-Impurity Diagnostics in the T-4 Tokamak,” Sov. J. Plasma Phys. 5, 551 (1979)].

Green, T. A.

E. J. Shipsey, T. A. Green, J. C. Browne, “Modified Method of Perturbed Stationary States. V. Electron Capture Cross Sections for the Reaction O8+ + H(1S) → O7+(n,l) + H+,” Phys. Rev. A 27, 821 (1983).
[CrossRef]

T. A. Green, E. J. Shipsey, J. C. Browne, “Modified Method of Perturbed Stationary States. IV. Electron Capture Cross Sections for the Reaction C6+ + H(1S) → C5+(n,l) + H+,” Phys. Rev. A 25, 1364 (1982).
[CrossRef]

Hallock, G. A.

G. A. Hallock et al., “Plasma Space Potential Measurements on ISX-B,” in Proceedings, IEEE Conference on Plasma Science (IEEE, New York, 1984).

Herndon, D. L.

R. J. Fonck, M. Finkenthal, R. J. Goldston, D. L. Herndon, R. A. Hulse, R. Kaita, D. D. Meyerhofer, “Spatially Resolved Measurements of Fully Ionized Low-Z Impurities in the PDX Tokamak,” Phys. Rev. Lett. 49, 737 (1982).
[CrossRef]

Hinnov, E.

E. Hinnov, “Highly Ionized Atoms in Tokamak Discharges,” Phys. Rev. 14, 1533 (1976).
[CrossRef]

Hulse, R. A.

R. J. Fonck, M. Finkenthal, R. J. Goldston, D. L. Herndon, R. A. Hulse, R. Kaita, D. D. Meyerhofer, “Spatially Resolved Measurements of Fully Ionized Low-Z Impurities in the PDX Tokamak,” Phys. Rev. Lett. 49, 737 (1982).
[CrossRef]

Isler, R. C.

R. C. Isler, L. E. Murray, “Plasma Rotation Measurements using Spectral Lines from Charge Transfer Reactions,” Appl. Phys. Lett 42, 355 (1983).
[CrossRef]

R. C. Isler, L. E. Murray, S. Kasai, J. L. Dunlap, S. C. Bates, P. H. Edmonds, E. A. Lazarus, C. H. Ma, M. Murakami, “Charge-Exchange Excitation and Recombination of Oxygen in the ISX-B Tokamak,” Phys. Rev. A 24, 2701 (1981).
[CrossRef]

R. C. Isler, “Profiles and Polarizations of the Balmer-α Line from High Temperature Hydrogen Atoms in Strong Magnetic Fields,” Phys. Rev. A 14, 1015 (1976).
[CrossRef]

R. C. Isler, Nucl. Instrum. Methods (1985), to be published.

Jaehnig, K. P.

R. J. Fonck, D. S. Darrow, K. P. Jaehnig, “Determination of Plasma-Ion Velocity Distribution via Charge-Exchange Recombination Spectroscopy,” Phys. Rev. A 29, 3288 (1984).
[CrossRef]

Johnstone, R. G.

Kaita, R.

R. J. Fonck, M. Finkenthal, R. J. Goldston, D. L. Herndon, R. A. Hulse, R. Kaita, D. D. Meyerhofer, “Spatially Resolved Measurements of Fully Ionized Low-Z Impurities in the PDX Tokamak,” Phys. Rev. Lett. 49, 737 (1982).
[CrossRef]

Kasai, S.

R. C. Isler, L. E. Murray, S. Kasai, J. L. Dunlap, S. C. Bates, P. H. Edmonds, E. A. Lazarus, C. H. Ma, M. Murakami, “Charge-Exchange Excitation and Recombination of Oxygen in the ISX-B Tokamak,” Phys. Rev. A 24, 2701 (1981).
[CrossRef]

M. Shiho, S. Konoshima, A. Funahashi, S. Kasai, T. Sugie, N. Suzuki, M. Shimada, N. Fujisawa, “Spectroscopic Study of Impurities in the JFT-2 Tokamak,” Nucl. Fusion 18, 1705 (1978).
[CrossRef]

Konoshima, S.

M. Shiho, S. Konoshima, A. Funahashi, S. Kasai, T. Sugie, N. Suzuki, M. Shimada, N. Fujisawa, “Spectroscopic Study of Impurities in the JFT-2 Tokamak,” Nucl. Fusion 18, 1705 (1978).
[CrossRef]

Korotko, A. A.

A. N. Zimovev, A. A. Korotko, E. R. Krzhizhnovskii, V. V. Aforsimov, Yu. S. Gordeev, Pis'ma Zh. Eksp. Teor. Fiz. 32, 557 (1980)[“Radial Distribution of the Concentration of Oxygen Nuclei in the Plasma of the T-10 Tokamak,” JETP Lett. 32, 539 (1980)].

Korotov, A. A.

V. V. Afrosimov, Yu. S. Gordeev, A. N. Zimovev, A. A. Korotov, Fiz. Plazmy 5, 981 (1979)[“Light-Impurity Diagnostics in the T-4 Tokamak,” Sov. J. Plasma Phys. 5, 551 (1979)].

Krzhizhnovskii, E. R.

A. N. Zimovev, A. A. Korotko, E. R. Krzhizhnovskii, V. V. Aforsimov, Yu. S. Gordeev, Pis'ma Zh. Eksp. Teor. Fiz. 32, 557 (1980)[“Radial Distribution of the Concentration of Oxygen Nuclei in the Plasma of the T-10 Tokamak,” JETP Lett. 32, 539 (1980)].

Lazarus, E. A.

R. C. Isler, L. E. Murray, S. Kasai, J. L. Dunlap, S. C. Bates, P. H. Edmonds, E. A. Lazarus, C. H. Ma, M. Murakami, “Charge-Exchange Excitation and Recombination of Oxygen in the ISX-B Tokamak,” Phys. Rev. A 24, 2701 (1981).
[CrossRef]

Lisitsa, V. S.

V. A. Abramov, F. F. Baryshnikov, V. S. Lisitsa, Zh. Eksper. Teor. Fiz. 27, 494 (1978)[“Change of Intensity of Spectral Lines of Multiply Charged Ions as a Result of Charge Exchange with Atom Hydrogen,” Sov. Phys. JETP 27, 464 (1978)] and private communication.

Ma, C. H.

R. C. Isler, L. E. Murray, S. Kasai, J. L. Dunlap, S. C. Bates, P. H. Edmonds, E. A. Lazarus, C. H. Ma, M. Murakami, “Charge-Exchange Excitation and Recombination of Oxygen in the ISX-B Tokamak,” Phys. Rev. A 24, 2701 (1981).
[CrossRef]

Mack, J. E.

Madden, R. P.

Meyerhofer, D. D.

R. J. Fonck, M. Finkenthal, R. J. Goldston, D. L. Herndon, R. A. Hulse, R. Kaita, D. D. Meyerhofer, “Spatially Resolved Measurements of Fully Ionized Low-Z Impurities in the PDX Tokamak,” Phys. Rev. Lett. 49, 737 (1982).
[CrossRef]

Murakami, M.

R. C. Isler, L. E. Murray, S. Kasai, J. L. Dunlap, S. C. Bates, P. H. Edmonds, E. A. Lazarus, C. H. Ma, M. Murakami, “Charge-Exchange Excitation and Recombination of Oxygen in the ISX-B Tokamak,” Phys. Rev. A 24, 2701 (1981).
[CrossRef]

Murray, L. E.

R. C. Isler, L. E. Murray, “Plasma Rotation Measurements using Spectral Lines from Charge Transfer Reactions,” Appl. Phys. Lett 42, 355 (1983).
[CrossRef]

R. C. Isler, L. E. Murray, S. Kasai, J. L. Dunlap, S. C. Bates, P. H. Edmonds, E. A. Lazarus, C. H. Ma, M. Murakami, “Charge-Exchange Excitation and Recombination of Oxygen in the ISX-B Tokamak,” Phys. Rev. A 24, 2701 (1981).
[CrossRef]

Olson, R. E.

R. E. Olson, “n,l Distributions in A8+ + H Electron-Capture Collisions,” Phys. Rev. A 24, 1726 (1981).
[CrossRef]

R. E. Olson, Department of Physics, University of Missouri; private communication.

Omidvar, K.

K. Omidvar, “Transition Probabilities, Life Times, and Branching Ratios in Hydrogen-like Atoms in the Linear Stark Effect,” At. Data Nucl. Tables 28, 215 (1983).
[CrossRef]

Paresce, F.

Salop, A

A Salop, “The Distribution of Excitation Resulting from Electron Capture in Stripped-Ion-Hydrogen-Atom Collisions,” J. Phys. B 12, 919 (1979).
[CrossRef]

Saltpeter, E. E.

H. A. Bethe, E. E. Saltpeter, Quantum Mechanics of One- and Two-Electron Atoms (Springer, Berlin, 1957).

Sampson, D. H.

D. H. Sampson, “On Statistical Equilibrium Among the Sublevels of Hydrogenic Atoms and Ions,” J. Phys. B 10, 749 (1977).
[CrossRef]

Shiho, M.

M. Shiho, S. Konoshima, A. Funahashi, S. Kasai, T. Sugie, N. Suzuki, M. Shimada, N. Fujisawa, “Spectroscopic Study of Impurities in the JFT-2 Tokamak,” Nucl. Fusion 18, 1705 (1978).
[CrossRef]

Shimada, M.

M. Shiho, S. Konoshima, A. Funahashi, S. Kasai, T. Sugie, N. Suzuki, M. Shimada, N. Fujisawa, “Spectroscopic Study of Impurities in the JFT-2 Tokamak,” Nucl. Fusion 18, 1705 (1978).
[CrossRef]

Shipsey, E. J.

E. J. Shipsey, T. A. Green, J. C. Browne, “Modified Method of Perturbed Stationary States. V. Electron Capture Cross Sections for the Reaction O8+ + H(1S) → O7+(n,l) + H+,” Phys. Rev. A 27, 821 (1983).
[CrossRef]

T. A. Green, E. J. Shipsey, J. C. Browne, “Modified Method of Perturbed Stationary States. IV. Electron Capture Cross Sections for the Reaction C6+ + H(1S) → C5+(n,l) + H+,” Phys. Rev. A 25, 1364 (1982).
[CrossRef]

Smith, M. W.

W. L. Wiese, M. W. Smith, B. M. Glennon, Atomic Transition Probabilities, NSRDS-NBS 4 (U.S. Government Printing Office, Washington, D.C., 1966), Vol. 1.

Sugie, T.

M. Shiho, S. Konoshima, A. Funahashi, S. Kasai, T. Sugie, N. Suzuki, M. Shimada, N. Fujisawa, “Spectroscopic Study of Impurities in the JFT-2 Tokamak,” Nucl. Fusion 18, 1705 (1978).
[CrossRef]

Suzuki, N.

M. Shiho, S. Konoshima, A. Funahashi, S. Kasai, T. Sugie, N. Suzuki, M. Shimada, N. Fujisawa, “Spectroscopic Study of Impurities in the JFT-2 Tokamak,” Nucl. Fusion 18, 1705 (1978).
[CrossRef]

Wiese, W. L.

W. L. Wiese, M. W. Smith, B. M. Glennon, Atomic Transition Probabilities, NSRDS-NBS 4 (U.S. Government Printing Office, Washington, D.C., 1966), Vol. 1.

Zimovev, A. N.

A. N. Zimovev, A. A. Korotko, E. R. Krzhizhnovskii, V. V. Aforsimov, Yu. S. Gordeev, Pis'ma Zh. Eksp. Teor. Fiz. 32, 557 (1980)[“Radial Distribution of the Concentration of Oxygen Nuclei in the Plasma of the T-10 Tokamak,” JETP Lett. 32, 539 (1980)].

V. V. Afrosimov, Yu. S. Gordeev, A. N. Zimovev, A. A. Korotov, Fiz. Plazmy 5, 981 (1979)[“Light-Impurity Diagnostics in the T-4 Tokamak,” Sov. J. Plasma Phys. 5, 551 (1979)].

Appl. Opt.

Appl. Phys. Lett

R. C. Isler, L. E. Murray, “Plasma Rotation Measurements using Spectral Lines from Charge Transfer Reactions,” Appl. Phys. Lett 42, 355 (1983).
[CrossRef]

At. Data Nucl. Tables

K. Omidvar, “Transition Probabilities, Life Times, and Branching Ratios in Hydrogen-like Atoms in the Linear Stark Effect,” At. Data Nucl. Tables 28, 215 (1983).
[CrossRef]

Fiz. Plazmy

V. V. Afrosimov, Yu. S. Gordeev, A. N. Zimovev, A. A. Korotov, Fiz. Plazmy 5, 981 (1979)[“Light-Impurity Diagnostics in the T-4 Tokamak,” Sov. J. Plasma Phys. 5, 551 (1979)].

J. Phys. B

A Salop, “The Distribution of Excitation Resulting from Electron Capture in Stripped-Ion-Hydrogen-Atom Collisions,” J. Phys. B 12, 919 (1979).
[CrossRef]

D. H. Sampson, “On Statistical Equilibrium Among the Sublevels of Hydrogenic Atoms and Ions,” J. Phys. B 10, 749 (1977).
[CrossRef]

Nucl. Fusion

M. Shiho, S. Konoshima, A. Funahashi, S. Kasai, T. Sugie, N. Suzuki, M. Shimada, N. Fujisawa, “Spectroscopic Study of Impurities in the JFT-2 Tokamak,” Nucl. Fusion 18, 1705 (1978).
[CrossRef]

Phys. Rev.

E. Hinnov, “Highly Ionized Atoms in Tokamak Discharges,” Phys. Rev. 14, 1533 (1976).
[CrossRef]

Phys. Rev. A

R. C. Isler, L. E. Murray, S. Kasai, J. L. Dunlap, S. C. Bates, P. H. Edmonds, E. A. Lazarus, C. H. Ma, M. Murakami, “Charge-Exchange Excitation and Recombination of Oxygen in the ISX-B Tokamak,” Phys. Rev. A 24, 2701 (1981).
[CrossRef]

R. J. Fonck, D. S. Darrow, K. P. Jaehnig, “Determination of Plasma-Ion Velocity Distribution via Charge-Exchange Recombination Spectroscopy,” Phys. Rev. A 29, 3288 (1984).
[CrossRef]

R. E. Olson, “n,l Distributions in A8+ + H Electron-Capture Collisions,” Phys. Rev. A 24, 1726 (1981).
[CrossRef]

T. A. Green, E. J. Shipsey, J. C. Browne, “Modified Method of Perturbed Stationary States. IV. Electron Capture Cross Sections for the Reaction C6+ + H(1S) → C5+(n,l) + H+,” Phys. Rev. A 25, 1364 (1982).
[CrossRef]

E. J. Shipsey, T. A. Green, J. C. Browne, “Modified Method of Perturbed Stationary States. V. Electron Capture Cross Sections for the Reaction O8+ + H(1S) → O7+(n,l) + H+,” Phys. Rev. A 27, 821 (1983).
[CrossRef]

R. C. Isler, “Profiles and Polarizations of the Balmer-α Line from High Temperature Hydrogen Atoms in Strong Magnetic Fields,” Phys. Rev. A 14, 1015 (1976).
[CrossRef]

Phys. Rev. Lett.

R. J. Fonck, M. Finkenthal, R. J. Goldston, D. L. Herndon, R. A. Hulse, R. Kaita, D. D. Meyerhofer, “Spatially Resolved Measurements of Fully Ionized Low-Z Impurities in the PDX Tokamak,” Phys. Rev. Lett. 49, 737 (1982).
[CrossRef]

Pis'ma Zh. Eksp. Teor. Fiz.

A. N. Zimovev, A. A. Korotko, E. R. Krzhizhnovskii, V. V. Aforsimov, Yu. S. Gordeev, Pis'ma Zh. Eksp. Teor. Fiz. 32, 557 (1980)[“Radial Distribution of the Concentration of Oxygen Nuclei in the Plasma of the T-10 Tokamak,” JETP Lett. 32, 539 (1980)].

Zh. Eksper. Teor. Fiz.

V. A. Abramov, F. F. Baryshnikov, V. S. Lisitsa, Zh. Eksper. Teor. Fiz. 27, 494 (1978)[“Change of Intensity of Spectral Lines of Multiply Charged Ions as a Result of Charge Exchange with Atom Hydrogen,” Sov. Phys. JETP 27, 464 (1978)] and private communication.

Other

G. A. Hallock et al., “Plasma Space Potential Measurements on ISX-B,” in Proceedings, IEEE Conference on Plasma Science (IEEE, New York, 1984).

R. C. Isler, Nucl. Instrum. Methods (1985), to be published.

H. A. Bethe, E. E. Saltpeter, Quantum Mechanics of One- and Two-Electron Atoms (Springer, Berlin, 1957).

W. L. Wiese, M. W. Smith, B. M. Glennon, Atomic Transition Probabilities, NSRDS-NBS 4 (U.S. Government Printing Office, Washington, D.C., 1966), Vol. 1.

R. E. Olson, Department of Physics, University of Missouri; private communication.

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Figures (4)

Fig. 1
Fig. 1

Experimental arrangement of the grazing incidence spectrometer and neutral beam injectors on the ISX-B tokamak.

Fig. 2
Fig. 2

(a) Emission from the 5—4 transition of O VIII excited primarily by charge transfer with neutral beam atoms; (b) neutral beam current as a function of time; and (c) emission from the resonance transition of O V, which is excited mainly by electron collisions.

Fig. 3
Fig. 3

Emissions from three Δn = 1 CXE transitions of O VIII. The signals are obtained by subtracting the backgrounds shown by dotted lines from the total detected radiation.

Fig. 4
Fig. 4

Relative response of a 2-m grazing incidence spectrometer system determined from CXE lines. The instrument is equipped with a 600-lines/mm gold-coated replica grating and a channeltron detector.

Tables (5)

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Table I Charge-Transfer Cross Sections into the Excited Levels of O7+ (10−16cm2)from Ref. 12

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Table II Effective CXE Cross Sections for O VII Excitation Normalized to the n = 5 → n = 4 transition (Absolute Cross Sections in Units of 10−15 cm2 are Shown in Parentheses)

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Table III Effective CXE Cross Sections for C VI Excitation Normalized to the n = 4 → n = 3 Transition (Absolute Cross Sections in Units of 10−15 cm2 are Shown in Parentheses)

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Table IV Effective CXE Cross Sections for N VII Excitation Normalized to the n = 4 → n = 3 Transition22 (Absolute Cross Sections in Units of 10−15 cm2 are Shown in Parentheses)

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Table V Relative Intensities of the Δn = 1 Transitions of O VIII and C VI Calculated for Various Assumptions About Populations and State Mixinga

Equations (2)

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N e Z 7.5 n 8.5 1.18 × 10 15 cm 3 .
Q l 1 j 1 , l 1 + 1 j 1 + 1 Q l 2 j 2 , l 2 + 1 j 2 + 1 = ( 2 l 2 + 3 ) ( l 1 + 2 ) ( 2 l 1 + 3 ) ( l 2 + 2 ) n 2 ( l 1 + 1 ) 2 n 2 ( l 2 + 1 ) 2 F ( β 1 ) F ( β 2 ) .

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