Small-chamber 4.7 kJ plasma focus for applications

Moreno, C.; Clausse, Alejandro; Bruzzone, H.; Martínez, Jorge Coque; Llovera, Roberto; Tartaglione, Aureliano

doi:10.1063/1.1374921

Cited by 12 publications

(14 citation statements)

References 3 publications

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“…High sensitivity orthochromatic Agfa x-ray film along with a terbium-doped gadolinium oxisulfide ͑Gd 2 O 2 S:Tb͒ intensifying screen, which is one of the most widely used film-screen sets for general purpose radiography as well as for hard x-ray imaging, [11][12][13][14] was used as a hard x-ray detector.…”

Section: Methodsmentioning

confidence: 99%

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Effective hard x-ray spectrum of a tabletop Mather-type plasma focus optimized for flash radiography of metallic objects

Raspa

Moreno

Sigaut

et al. 2007

Journal of Applied Physics

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Effective hard x-ray spectrum of a tabletop Mather-type plasma focus optimized for flash radiography of metallic objects The effective spectrum of the hard x-ray output of a Mather-type tabletop plasma focus device was determined from attenuation data on metallic samples using commercial radiographic film coupled to a Gd 2 O 2 S : Tb phosphor intensifier screen. It was found that the radiation has relevant spectral components in the 40-150 keV range, with a single maximum around 60− 80 keV. The radiation output allows for 50 ns resolution, good contrast, and introspective imaging of metallic objects even through metallic walls. A numerical estimation of the induced voltage on the focus during the compressional stage is briefly discussed.

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Section: Methodsmentioning

confidence: 99%

“…Additional examples can be seen in Ref. 12. More recently, a tabletop plasma focus facility was used as a hard x-ray source for 50 ns resolution radiography of metallic objects either in fast rotation 13 or through as much as 22-mm-thick metallic walls.…”

Section: Introductionmentioning

confidence: 99%

Effective hard x-ray spectrum of a tabletop Mather-type plasma focus optimized for flash radiography of metallic objects

Raspa

Moreno

Sigaut

et al. 2007

Journal of Applied Physics

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“…Introspective images of small metallic pieces [16,17] even through several millimeter thick metallic walls [18] were also produced. Additionally, a radiography of an aluminum turbine rotating at 6120 rpm using a plasma focus pulse was reported [19].…”

Section: Introductionmentioning

confidence: 99%

Plasma focus based repetitive source of fusion neutrons and hard x-rays

et al. 2008

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A plasma focus device capable of operating at 0.2 pulses per second during several minutes is used as a source of hard x-rays and fast neutrons. An experimental demonstration of the use of the neutrons emissions for radiation probing of hydrogenated substances is presented, showing a particular application in detecting water concentrations differences in the proximity of the device by elastic scattering. Moreover, the device produces ultrashort hard x-rays pulses useful for introspective images of small objects, static or in fast motion, suitable for the identification of internal submillimetric defects. Clear images of metallic objects shielded by several millimeters iron walls are shown.

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“…The current basic and applied research interest of PF is related to dense plasma physics and innovative applications of pulsed radiation sources. The latter had attracted the attention of researchers during recent years, such as the use of ion beams for surface treatments [1,2], lithography by means of either soft X-rays or electron beams [3,4], radiography [5,6], metal defectoscopy [7], and neutronic detection of hydrogen in samples [8,9].…”

Section: Introductionmentioning

confidence: 99%

Plasma focus as a powerful hard X-ray source for ultrafast imaging of moving metallic objects

Raspa¹,

Sigaut²,

Llovera³

et al. 2004

Braz. J. Phys.

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Using high energy, pulsed X-rays, generated by a 4.7 kJ Plasma Focus operated with deuterium -argon admixtures, images of fast rotating metallic pieces were obtained. This illustrates the potential application of Plasma Focus devices for non invasive scanning of moving metallic objects. The samples for radiographic imaging were located outside the plasma focus chamber. High-sensitivity, fast-response commercial radiographic film was used as X-ray detector. The use of small doses of argon helps to enhance both the neutron production and the hard X-ray emission. By analyzing the mean attenuation of the studied radiation in different metals, an X-ray effective energy of about 100 keV was obtained.

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Small-chamber 4.7 kJ plasma focus for applications

Cited by 12 publications

References 3 publications

Effective hard x-ray spectrum of a tabletop Mather-type plasma focus optimized for flash radiography of metallic objects

Effective hard x-ray spectrum of a tabletop Mather-type plasma focus optimized for flash radiography of metallic objects

Plasma focus based repetitive source of fusion neutrons and hard x-rays

Plasma focus as a powerful hard X-ray source for ultrafast imaging of moving metallic objects

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