Abstract
AN arrangement frequently used for magnetic focusing in mass spectrographs is the symmetrical one employing normal entry into, and exit from, a uniform magnetic field of sector shape. This gives only first-order focusing, as the straight-line boundaries are the tangents to the ideal symmetrical curve for perfect focusing as given by Hintenberger1 and by Kerwin2. To obtain second-order focusing, Kerwin3 has used as boundaries the tangents at the points of inflexion on this curve, the entry and exit of the particles being oblique.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Hintenberger, Z. Naturforsch., 3 a, 125 (1948).
Kerwin, Rev. Sci. Instr., 20, 36 (1949).
Kerwin, Rev. Sci. Instr., 21, 96 (1950).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
WALTON, E. High-order Focusing by a Uniform Magnetic Field with Straight-line Boundaries. Nature 173, 1147–1148 (1954). https://doi.org/10.1038/1731147a0
Issue Date:
DOI: https://doi.org/10.1038/1731147a0
This article is cited by
-
Aβ-ray spectrometer of toroid-sector type
Acta Physica Academiae Scientiarum Hungaricae (1959)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.
