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Doppler spectroscopy of a beam in the channel of a H− ion source

  • Atoms, Spectra, and Radiation
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Abstract

It is shown that high-accuracy contact-free measurements of the divergence and emittance of an accelerated H− ion beam at the exit from the source can in principle be performed by passive Doppler spectroscopy of a beam of excited hydrogen atoms produced by neutralization of the ions with excitation on the residual gas in the source channel. The intensity of the Hα-line radiation detected by the Doppler system is calculated, taking into account the principal processes leading to the excitation and deexcitation of the 3s, 3p, and 3d levels of the hydrogen atoms in the beam, for residual gas densities of the order of 10−4–10−5 Torr in the source channel. The computed Hα-line intensity was confirmed experimentally, making it possible to perform photoelectronic detection of the spectral contour of the line in the current mode rather than the photon-counting mode.

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Authors and Affiliations

  1. Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia

    V. V. Antsiferov & G. I. Smirnov

Authors
  1. V. V. Antsiferov
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  2. G. I. Smirnov
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Zh. Tekh. Fiz. 68, 15–18 (June 1998)

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Antsiferov, V.V., Smirnov, G.I. Doppler spectroscopy of a beam in the channel of a H− ion source. Tech. Phys. 43, 627–630 (1998). https://doi.org/10.1134/1.1259043

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  • DOI: https://doi.org/10.1134/1.1259043

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