Plasma Focus as a High Intensity Flash X-Ray Source for Biological Radiography

Hussain, Shafqat; Ahmad, Shamim; Khan, Muhammad Zubair; Zakaullah, M.; Waheed, A.

doi:10.1023/b:jofe.0000037787.36243.b1

Cited by 43 publications

(23 citation statements)

References 14 publications

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“…However, this kind of sources has the technical disadvantage of the repetition regime, unlike to the performance that could have a plasma focus device, especially those of low energy. Radiographic applications using dense transient PF devices operating at some kJ or greater energy have been obtained in several laboratories in both biological radiography [5,6] and introspective radiography of non-biological objects [7,8] [3,[9][10][11][12][13][14][15][16]. Another advantage that favors the development of small plasma focus devices is the scaling observed in the dimensions of the pinch [17].…”

Section: Introductionmentioning

confidence: 99%

Potentiality of a table top plasma focus as X-ray source: Radiographic applications

Pavez¹,

Zambra²,

Veloso³

et al. 2014

J. Phys.: Conf. Ser.

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Abstract. Images radiographic testing on different elements both in biological and inorganic samples are obtained using the X-ray radiation coming from a small plasma focus of at least 350J (880 nF, 40 nH, 28kV, T/4 ∼ 300ns). The experimental device is operated using hydrogen as filling gas in a discharge region limited by a volume of around 70 cm 3 . The X-ray radiation is monitored shot by shot by means of a scintillator-photomultiplier system located outside of the vacuum chamber at 2.3m far away from the emission region. Angular distribution measurements of the accumulated X-ray dose are carried out using TLD-100 dosimeters which are radially distributed around the emission region center. There are two different arrays for the dosimeter which are placed in two different radial positions outside the discharge chamber. In each array, the TLDs dosimeters are uniformly located and distributed respect to the symmetry axis of the plasma column. An estimation of the energy spectrum of X-ray by means of the filters techniques is presented. The potential of this table top plasma focus is discussed according to its size, the quality of the radiographies, the effective equivalent energy and the dosimetric characteristics.

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Section: Introductionmentioning

confidence: 99%

Potentiality of a table top plasma focus as X-ray source: Radiographic applications

Pavez¹,

Zambra²,

Veloso³

et al. 2014

J. Phys.: Conf. Ser.

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“…A lot of samples of them in the range of less than one Joule to some Megajouls have been constructed in different research centers all over the world [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Experimental results of breakdown in "Dena" plasma focus device

Goudarzi¹,

Hoseinian²,

Raeisdana³

2014

J. Phys.: Conf. Ser.

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Abstract. In spite of the intense research activities on Plasma Focus devices, the physics of the initial breakdown and surface discharge phase has not been realized completely. In this paper we have analyzed the surface discharge and initial breakdown phase in Filippov-type Plasma Focus Facility "Dena" (90 kJ, 25 kV) on the base of the current and current derivative measured signals by using Argon, Neon and Krypton as working gases at different discharge voltages and gas pressures, and the effects of working conditions (atomic weight, discharge voltage and gas pressure) on the breakdown and surface discharge phase have expressed. Also, on the base of these results, we have investigated about the relation of this phase with final pinch phase.

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“…Other reported applications are radiographies of biological samples [11][12][13], small pieces made of different materials [14], and a rotating car wheel [15]. Introspective images of small metallic pieces [16,17] even through several millimeter thick metallic walls [18] were also produced.…”

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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Plasma Focus as a High Intensity Flash X-Ray Source for Biological Radiography

Cited by 43 publications

References 14 publications

Potentiality of a table top plasma focus as X-ray source: Radiographic applications

Potentiality of a table top plasma focus as X-ray source: Radiographic applications

Experimental results of breakdown in "Dena" plasma focus device

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

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