Radiation protection of PFMA-1, a plasma focus for medical applications

Fabbri, Alessandro; Frignani, Michele; Mannucci, S.; Mostacci, Domiziano; Rocchi, Federico; Sumini, Marco; Teodori, Francesco; Angeli, E.; Tartari, A.; Cucchi, G.

doi:10.1088/0952-4746/27/4/007

Cited by 7 publications

(3 citation statements)

References 5 publications

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“…Plasma focus devices [1][2][3][4][5] are devices with the capacity of, by the demand of the operator, producing pulses of hard x-ray (several hundred of keV), nuclear fusion neutrons, energetic electrons and ions, plasma jets and other radiations. These interesting characteristics have been and can be applied to different fields, like modification and evaluation of materials [6][7][8][9][10][11][12], preventive analysis of fault [13], detection of nuclides [14], medical applications [15,16], soil humidity measurements [17], nanofabrication of semiconductors [18], to radiograph of biological and inorganic samples [19], lithography [20][21][22][23][24][25] between others. This type of z-pinch are self-scaled [26,27] then, from mJ to MJ, it can be used a set of scale rules to design one.…”

Section: Introductionmentioning

confidence: 99%

Dense plasma focus: different cathode geometries and their influence on the hard x-ray production

Barbaglia

Giovachini

Milanese

2023

Plasma Phys. Control. Fusion

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Using the plasma-focus device called PACO (Plasma Auto COnfinado), three types of cathodes were experimentally investigated to evaluate their influence on the hard X-ray production. Two barred cathodes with diameters of 82 mm and 90 mm and one cathode without any specific structure (i.e. the current sheet flowed freely on the radial axis) were tested for this work. In every experiment, the capacitor bank was charged to 31KV. The gas used was deuterium in the pressure range of 0.5 mbar and 3.0 mbar. The production of neutrons and hard X-ray simultaneously was not detected outside this range. Using the cathode with a diameter of 82 mm the hard X-ray production was maximized.

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Section: Introductionmentioning

confidence: 99%

Dense plasma focus: different cathode geometries and their influence on the hard x-ray production

Barbaglia

Giovachini

Milanese

2023

Plasma Phys. Control. Fusion

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“…The importance of PF devices stems from their ease of construction, low cost, and reliability of which are ideal for advanced applications [5][6][7][8][9][10][11]. Using the penetration and activating properties of neutral radiation, the emitted neutrons may be used to conduct radiographs and material analysis.…”

Section: Introductionmentioning

confidence: 99%

Magnetic field induction and magnetic force distribution profiles in plasma focus discharge device

Lashin¹,

Allam²,

El-Sayed³

et al. 2021

Plasma Sci. Technol.

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We report a simple-to-perform technique to investigate the distribution of the azimuthal magnetic field induction, B θ , and the induced magnetic force acting on the plasma current sheath (PCS) in a plasma focus (PF) discharge. This in situ measurement technique can undoubtedly be beneficial when other fast-imaging techniques are not available. techniques are not available. Experimental work was conducted in the low-energy Mather-type EAEA-PF1 device operated in argon. The axial distribution (B θ ) z along the coaxial electrodes system was measured with a four magnetic-probe set technique at different radial distances (r = 2.625 × 10−2 to 4.125 × 10−2 m) within the annular space between the coaxial electrodes during the 1st and 2nd half cycles of the discharge current waveform, where inner electrode of coaxial electrode system has a +ve polarity and −ve polarity, respectively. Axial, radial and total magnetic force distribution profiles were estimated from B θ data. Investigation of PCS shape in terms of its inclination (curvature) angle, θ, along the axial rundown phase and the correlation between the magnetic forces per unit volume acting on the PCS, the inclination angle θ of the PCS, and the formation of a powerful PF action during the 1st and 2nd half cycles is carried out. Dependence of inclination angle, θ, on total magnetic force per unit volume acting on PCS axial motion was studied, separately, during the 1st and 2nd half cycles.

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“…Due to this fact, in many countries intensive research into fusion is conducted and the scope of plasma experiments is so broad that the aspect of radiation hazard must be the subject of separate studies [1,2]. To tackle this challenge, the independent program on human hazard during plasma experiments in * E-mail: szewczak@clor.waw.pl Poland has been conducted in the Central Laboratory for Radiological Protection (CLRP).…”

Section: Introductionmentioning

confidence: 99%

Calibration of the RSS-131 high efficiency ionization chamber for radiation dose monitoring during plasma experiments conducted on plasma focus device

Szewczak

Jednoróg

2014

Open Physics

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Abstract:Plasma research poses a radiation hazard. Due to the program of deuterium plasma research using the PF-1000 device, it is an intensive source of neutrons (up to 10 11 n · −1 ) with energy of 2,45 MeV and ionizing electromagnetic radiation with a broad energy spectrum. Both types of radiation are mostly emitted in ultra-short pulses (∼100 ns). The aim of this work was to test and calibrate the RSS-131 radiometer for its application in measurements of ultra-short electromagnetic radiation pulses with broad energy spectrum emitted during PF-1000 discharge. In addition, the results of raw measurements performed in the control room are presented. 87.55.N, 52.58.Lq PACS (2008):

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Radiation protection of PFMA-1, a plasma focus for medical applications

Cited by 7 publications

References 5 publications

Dense plasma focus: different cathode geometries and their influence on the hard x-ray production

Dense plasma focus: different cathode geometries and their influence on the hard x-ray production

Magnetic field induction and magnetic force distribution profiles in plasma focus discharge device

Calibration of the RSS-131 high efficiency ionization chamber for radiation dose monitoring during plasma experiments conducted on plasma focus device

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