Effective Spot Size in Beam Scanning Tubes

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Publisher: SMPTE
Doc Type: Journal Article
Article Type: research-article
Abstract: The Gaussian current distribution does not hold in practical electron beams because of aberrations, space-charge and masking conditions. Only an overall effect of the total current is useful for defining spot size; and thus, the observation of the visible spot boundaries on phosphor screens is adopted (telescope). Because of the prevailing bell-shaped current density distributions, this definition comes closest to a practical measure of spot size based on center peak brightness. Experimental evidence is given for the formation of vertically reduced spot sizes during beam scanning in form of ellipses, manifesting itself in a significant improvement on vertical picture resolution.
Publication Date: 1960-10-01
DOI: 10.5594/J09404
Link: https://doi.org/10.5594/J09404
Author(s): Aurelius Sandor

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Aurelius Sandor; Effective Spot Size in Beam Scanning Tubes, Journal of the SMPTE ( Volume: 69, Issue: 10, October 1960); SMPTE, 1960. Available at https://doi.org/10.5594/J09404

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Aurelius Sandor; Effective Spot Size in Beam Scanning Tubes, Journal of the SMPTE ( Volume: 69, Issue: 10, October 1960); SMPTE, 1960. Available at https://doi.org/10.5594/J09404

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Aurelius Sandor; Effective Spot Size in Beam Scanning Tubes, Journal of the SMPTE ( Volume: 69, Issue: 10, October 1960); SMPTE, 1960. Available at https://doi.org/10.5594/J09404

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<span class="citation">Aurelius Sandor; <cite>Effective Spot Size in Beam Scanning Tubes</cite>, Journal of the SMPTE ( Volume: 69, Issue: 10, October 1960); SMPTE, 1960. Available at <a href="https://doi.org/10.5594/J09404" target="_blank" rel="noopener">https://doi.org/10.5594/J09404</a></span>

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Aurelius Sandor; Effective Spot Size in Beam Scanning Tubes, Journal of the SMPTE ( Volume: 69, Issue: 10, October 1960); SMPTE, 1960
doi: 10.5594/J09404
url: https://doi.org/10.5594/J09404

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<li>
Aurelius Sandor; <cite id="bib-10-5594-j09404">Effective Spot Size in Beam Scanning Tubes</cite>, Journal of the SMPTE ( Volume: 69, Issue: 10, October 1960); SMPTE, 1960
<span class="doi">10.5594/J09404</span>
</li>