Pinch Phenomena in a Flash X-ray Discharge

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 73, No. 4, pp. 320–324
Abstract: The discharges were performed in a coaxial flash x-ray tube (voltage = 15 kv, pressure = 10-5 to 10-6 mm Hg and inductance = 75 × 10-9 h) provided with a plane parallel electrode system. The discharge process has been studied by oscillographic recordings of any pair of the three quantities: current, its time derivative and x-ray output, inside the time interval during which the heavy current pulse (peak current about 25 ka) occurs in the discharge. The production of both single and multiple x-ray outputs of short duration (0.1 μsec or less) is discussed and seems to be caused by pinch phenomena occurring in a plasma column between the tube electrodes. Small changes in dI/dt during the pinching are interpreted as sausage instabilities which cause high local rates of increase in inductance giving a potential drop (V = I dL/dt) across each constriction of the discharge. Estimation of the accelerating voltage during the pinching showed that it could reach values almost four times as high as the applied initial capacitor voltage. In order to get the timing of the x-ray outputs under better control, a new method for discharge initiation is suggested.
Publication Date: 1964-04-01
DOI: 10.5594/J07259
ISSN: Print: 0361-4573
Link: https://doi.org/10.5594/J07259
Author(s): Sture K. HändelDept. of Physics, University of Upsala, Upsala, Sweden
Copyright: © 1964 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

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Sture K. Händel; Pinch Phenomena in a Flash X-ray Discharge, Journal of the SMPTE ( Volume: 73, Issue: 4, April 1964); SMPTE, 1964. Available at https://doi.org/10.5594/J07259

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Sture K. Händel; Pinch Phenomena in a Flash X-ray Discharge, Journal of the SMPTE ( Volume: 73, Issue: 4, April 1964); SMPTE, 1964. Available at https://doi.org/10.5594/J07259

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Sture K. Händel; Pinch Phenomena in a Flash X-ray Discharge, Journal of the SMPTE ( Volume: 73, Issue: 4, April 1964); SMPTE, 1964. Available at https://doi.org/10.5594/J07259

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<span class="citation">Sture K. Händel; <cite>Pinch Phenomena in a Flash X-ray Discharge</cite>, Journal of the SMPTE ( Volume: 73, Issue: 4, April 1964); SMPTE, 1964. Available at <a href="https://doi.org/10.5594/J07259" target="_blank" rel="noopener">https://doi.org/10.5594/J07259</a></span>

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Sture K. Händel; Pinch Phenomena in a Flash X-ray Discharge, Journal of the SMPTE ( Volume: 73, Issue: 4, April 1964); SMPTE, 1964
doi: 10.5594/J07259
url: https://doi.org/10.5594/J07259

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<li>
Sture K. Händel; <cite id="bib-10-5594-j07259">Pinch Phenomena in a Flash X-ray Discharge</cite>, Journal of the SMPTE ( Volume: 73, Issue: 4, April 1964); SMPTE, 1964
<span class="doi">10.5594/J07259</span>
</li>