D-D neutron yield in the 125 J dense plasma focus Nanofocus

Milanese, M.; Moroso, R.; Pouzo, J.

doi:10.1140/epjd/e2003-00247-9

Cited by 60 publications

(36 citation statements)

References 12 publications

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“…Apart from nuclear-fusion studies, the plasma focus can be conceived from many other points of view: emission of hard and soft X-ray [7] and microwave brief pulses, relativistic electron and energetic ion beams [8], brief nuclear-fusion neutron pulses, plasma jets [9], etc., everyone with possible practical applications. Much of these are studied by our investigation group, for example, plasma-focus devices of very small size and energy, designed on purpose for soil-humidity determination through neutron-pulses attenuation, have been developed by us [10].…”

Section: Introductionmentioning

confidence: 99%

Filaments in the Sheath Evolution of the Dense Plasma Focus as Applied to Intense Auroral Observations

Milanese

Niedbalski

Moroso

2007

IEEE Trans. Plasma Sci.

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This paper investigates the dense plasma focus (DPF) for applications in space-plasma physics. The plasma focus (a variant of Z-pinch) generates plasmas from fast high-voltage electrical discharges on coaxial electrodes suitable for very different studies: from fusion up to plasma-space modeling. In particular, the plasma sheath of the DPF is studied here and measured in some detail as a possible model for auroral observations. Deuterium gas was used in the experiments, and many helpful techniques were used, such as ultrafast photograph and neutron detection from nuclear-fusion reactions. In this paper, we show the different phases of the plasma focus correlated with discharge-current characteristics and neutron and X-ray production. Filamentary formations in the current sheath are shown, and its correlation with neutron production is done. The same number of filaments (about 60) reported in auroral observations are detected in plasma-focus discharges.

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Section: Introductionmentioning

confidence: 99%

Filaments in the Sheath Evolution of the Dense Plasma Focus as Applied to Intense Auroral Observations

Milanese

Niedbalski

Moroso

2007

IEEE Trans. Plasma Sci.

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“…From the beam target model point of view, below the optimum pressure, the number density of the deuterons accelerated in the axial direction is lower and thus results in lower neutron flux. At pressures above the optimum pressure, the speed of the deuterons decreases during the post collapse phase as it has to pass through dense ambient gas which will result in less efficient beam-target interaction leading to low neutron flux [27]. The method to calculate X-ray emission in certain energy window has been described elsewhere in detail [28,29].…”

Section: Resultsmentioning

confidence: 99%

Correlation of Neutron and X-ray Emission from Plasma Focus with Pre-ionization

et al. 2014

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The effect of pre-ionization caused by depleted uranium ( 92 U 238 ) on the correlation of neutron and X-ray emission from 1.8 kJ plasma focus is investigated by employing photomultiplier tubes (XP2020) coupled with fast (50 9 50) mm 2 cylindrical plastic scintillators (NE102A) along with GM tube and Quantrad Si PIN diodes with a pair of appropriate filters. It is found that neutron and Cu-K a emission along with total X-ray yield are significantly increases with pre-ionization as compared to those without pre-ionization. Moreover, pre-ionization improves the shot to shot reproducibility of the system and broadens the operating pressure regime both for neutron and X-ray emission.

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“…7 Several scaling laws have been established. [8][9][10][11] But the evolution and upgradation of research device to cater the industrial level requirements needs a better understanding of the dependence of the neutron emission on different parameters of the PF device. [12][13][14] The reproducible neutron emission of the order of 10 10 -10 11 neutrons/shot was measured by Szydlowski et al 15 from the PF-1000 facility having discharge energy levels exceeding 1 MJ.…”

Section: Effect Of Anode Shape On Correlation Of Neutron Emission Witmentioning

confidence: 99%

Effect of anode shape on correlation of neutron emission with pinch energy for a 2.7kJ Mather-type plasma focus device

Hussain¹,

Ahmad²,

Murtaza³

et al. 2009

Journal of Applied Physics

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Correlation of neutron emission with pinch energy for a Mather-type plasma focus energized by a single capacitor 12.5 F, 21 kV ͑2.7 kJ͒ is investigated by employing time resolved and time integrated detectors for two different anode shapes. The maximum average neutron yield of about 1.3ϫ 10 8 per shot is recorded with cylindrical anode, that increases to 1.6ϫ 10 8 per shot for tapered anode. At optimum pressure the input energy converted to pinch energy is about 24% for cylindrical anode as compared to 36% for tapered anode. It is found that the tapered anode enhances neutron flux about 25Ϯ 5% both in axial and radial directions and also broadens the pressure range for neutron emission as well as pinch energy. The neutron yield and optimum gas filling pressures are found strongly dependent on the anode shape.

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D-D neutron yield in the 125 J dense plasma focus Nanofocus

Cited by 60 publications

References 12 publications

Filaments in the Sheath Evolution of the Dense Plasma Focus as Applied to Intense Auroral Observations

Filaments in the Sheath Evolution of the Dense Plasma Focus as Applied to Intense Auroral Observations

Correlation of Neutron and X-ray Emission from Plasma Focus with Pre-ionization

Effect of anode shape on correlation of neutron emission with pinch energy for a 2.7kJ Mather-type plasma focus device

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