New source of MeV negative ion and neutral atom beams

S. Ter-Avetisyan; J. Braenzel; M. Schnürer; R. Prasad; M. Borghesi; S. Jequier; V. Tikhonchuk

doi:10.1063/1.4935234

New source of MeV negative ion and neutral atom beams

S. Ter-Avetisyan^*
, J. Braenzel
, M. Schnürer
, R. Prasad
, M. Borghesi
, S. Jequier
, V. Tikhonchuk

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

451 Downloads (Pure)

Abstract

The scenario of "electron-capture and -loss" was recently proposed for the formation of negative ion and neutral atom beams with MeV kinetic energies. However, it does not explain why the formation of negative ions in a liquid spray is much more efficient than with an isolated atom. The role of atomic excited states in the charge-exchange processes is considered, and it is shown that it cannot account for the observed phenomena. The processes are more complex than the single electron-capture and -loss approach. It is suggested that the shell effects in the electronic structure of the projectile ion and/or target atoms may influence the capture/loss probabilities.

Original language	English
Article number	02B134
Number of pages	3
Journal	Review of Scientific Instruments
Volume	87
Issue number	2
Early online date	16 Nov 2015
DOIs	https://doi.org/10.1063/1.4935234
Publication status	Published - 2016

Bibliographical note

Contributed paper, published as part of the Proceedings of the 16th International Conference on Ion Sources, New York, New York, USA, August 2015.

ASJC Scopus subject areas

Instrumentation

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10.1063/1.4935234

New source of MeV negative ion and neutral atom beams
Copyright (2016) AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Ter-Avetisyan, S, Braenzel, J, Schnürer, M, Prasad, R, Borghesi, M, Jequier, S & Tikhonchuk, V 2016, 'New source of MeV negative ion and neutral atom beams' Review of Scientific Instruments, vol 87, no. 2, 02B134. and may be found at https://pure.qub.ac.uk/admin/editor/dk/atira/pure/api/shared/model/base_uk/researchoutput/editor/contributiontojournaleditor.xhtml.
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Cite this

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AU - Ter-Avetisyan, S.

AU - Braenzel, J.

AU - Schnürer, M.

AU - Prasad, R.

AU - Borghesi, M.

AU - Jequier, S.

AU - Tikhonchuk, V.

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AB - The scenario of "electron-capture and -loss" was recently proposed for the formation of negative ion and neutral atom beams with MeV kinetic energies. However, it does not explain why the formation of negative ions in a liquid spray is much more efficient than with an isolated atom. The role of atomic excited states in the charge-exchange processes is considered, and it is shown that it cannot account for the observed phenomena. The processes are more complex than the single electron-capture and -loss approach. It is suggested that the shell effects in the electronic structure of the projectile ion and/or target atoms may influence the capture/loss probabilities.

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New source of MeV negative ion and neutral atom beams

Abstract

Bibliographical note

ASJC Scopus subject areas

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