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E(parallel)B energy-mass spectrograph for measurement of ions and neutral atoms : Proceedings of the eleventh topical conference on high temperature plasma diagnostics (1997)

Funsten, H. O. ; McComas, D. J.

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 68 (1997), S. 292-295

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ISSN: 1089-7623

Source: AIP Digital Archive

Topics: Physics , Electrical Engineering, Measurement and Control Technology

Notes: Real-time measurement of plasma composition and energy is an important diagnostic in fusion experiments. The Thomson parabola spectrograph described here utilizes an electric field parallel to a magnetic field (E(parallel)B) and a two-dimensional imaging detector to uniquely identify the energy-per-charge and mass-per-charge distributions of plasma ions. An ultrathin foil can be inserted in front of the E(parallel)B filter to convert neutral atoms to ions, which are subsequently analyzed using the E(parallel)B filter. Since helium exiting an ultrathin foil does not form a negative ion and hydrogen isotopes do, this spectrograph allows unique identification of tritium ions and neutrals even in the presence of a large background of 3He. © 1997 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1147824

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