Measurement of angular distribution of neutrons emitted from plasma focus using NTD

Antanasijević, R.; Marić, Z.; Banjanac, R.; Dragić, A.; Stanojevic, Jovica; Đorđević, D.; Joksimović, D.; Udovičić, V.; Vuković, J.

doi:10.1016/s1350-4487(99)00147-x

Cited by 6 publications

(5 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The optimum pressure seems to fit well with the snow-plow model. Although there are not enough experimental data points for the angles of 0-25˚in figure 4, it may be assumed that the neutrons are generated spatially with Gaussian distributions based upon the earlier work (Antanasijević et al 1999, Castillo et al 2003. In addition, the isotropic and anisotropic contributions have different tendencies of variation with the filling pressure.…”

Section: Discussionmentioning

confidence: 99%

“…Castillo et al (2000Castillo et al ( , 2003 maintained that the thermonuclear fusion and beam-target mechanisms co-exist from the evidence of soft x-ray emission due to bremsstrahlung and hard x-ray emission due to interactions between high energy electron and electrode surface, respectively. Antanasijević et al (1999) and Castillo et al (2003) have shown that the neutron angular distribution has a Gaussian function when pure deuterium gas is used as the filling gas. They also observed that the neutron angular distribution has a tendency to become isotropic with argon-deuterium mixture.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dependence of neutron yield on the deuterium filling pressure in a plasma focus device

Woo

Chung

Lee

2004

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

A Mather-type plasma focus device (32 µF, 4 kJ), called Hanyang University Plasma Focus device, is developed as a prototype device for the irradiation test of neutrons for electric probes and cables to be used in Korea Superconducting Tokamak Advanced Research with pure deuterium gas. The six different lengths of electrode are used in order to see the dependence of neutron yield on the deuterium filling pressure at given system conditions such as capacitance, currents and inductance, after optimizing the focusing condition in terms of electrode length versus filling pressure. The relationship between the pressure and electrode length is to be fitted well by the snow-plow model. The neutron fluence and angular distribution are measured at the angles of 0˚, 25˚, 60˚and 90˚by locating the bubble neutron dosimeter at a distance 30 cm from the inner electrode head at each electrode length. The anisotropic factor tends to increase with pressure and the total neutron yield is strongly dependent on the isotropic emission. The maximum neutron yield is estimated to be about 1.6 × 10 8 (n/shot) at a pressure of 3.4 Torr.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dependence of neutron yield on the deuterium filling pressure in a plasma focus device

Woo

Chung

Lee

2004

Plasma Phys. Control. Fusion

View full text Add to dashboard Cite

show abstract

“…Dimension of emission space show that deuterons was emitted before plasma collapse, simiraly to the soft X-ray [14]. The obtained neutron spatial distribution show anisotropy in the axial direction and can be explained on the basis of the existence of "hot spots" above the central electrode [15].…”

Section: Resultsmentioning

confidence: 87%

“…If the fusion mechanism is thermonuclear, an isotropic emission of the neutrons is expected. On the other side, experimentally observed anisotropic component in the neutron emission [11] is related to ion beam-target fusion. The second component usually contributes less and ranges from 4% to 38% of the total neutron yield.…”

Section: Theorymentioning

confidence: 99%

“…In addition, on the same device, preliminary results were obtained of the short-living radioisotopes' production. The obtained radioisotopes in the plasma focus are 15 O, 17 F and 13 N, and the corresponding reactions are 14 N (d, n) 15 O, 16 O (d, n) 17 F and 12 C (d, n) 13 N, respectively. Activity of the short-living radioisotope was to 1 µCi per discharge [6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Plasma Focus Studies in Serbia

Udovičić¹,

Veselinović²,

Joksimović³

et al. 2014

JMP

View full text Add to dashboard Cite

The plasma focus experiment in Belgrade, Serbia started in the late eighties of the last century. The historical overview of the research activity on the Belgrade plasma focus device (BPFD) will be presented in this work. The special attention has been made to the present status and the future plans for the fundamental and applied research as a part of the project of the studies of rare nuclear and particle processes in nature. BPFD is intended to operate as optimized neutron source or hard X-ray source. Using Lee model code as a reference, several upgrades of BPFD must be made: better shielding against EMI pulse, rearrangement of capacitors bank so that higher repetition rate can be achieved and also faster digital acquisition system. BPFD can be used for neutron activation or production of short-living radioisotopes. These radioisotopes will have very low activity which can be analyzed in the underground Low-Background Laboratory for Nuclear Physics, Zemun. Also, we compared the obtained experimental data (neutron yield, total current waveform, working gas pressure) with the numerical simulation code (The Lee model code) to test our plasma focus machine. Comparison between neutron yield from our experimental data and neutron scaling laws and neutron yields derived from computation using the Lee Model code shows good matching, but for better verification of the code, more experimental data are needed.

show abstract

Experimental Study on the Importance of Accurate Neutron Angular Distribution Measurement for Determination of Neutron Yield in a 2.5 kJ Mather type PF

Bidabadi

Davani

2010

J Fusion Energ

View full text Add to dashboard Cite

Measurement of angular distribution of neutrons emitted from plasma focus using NTD

Cited by 6 publications

References 7 publications

Dependence of neutron yield on the deuterium filling pressure in a plasma focus device

Dependence of neutron yield on the deuterium filling pressure in a plasma focus device

Plasma Focus Studies in Serbia

Experimental Study on the Importance of Accurate Neutron Angular Distribution Measurement for Determination of Neutron Yield in a 2.5 kJ Mather type PF

Contact Info

Product

Resources

About