Angular distribution of protons emitted from the hydrogen plasma focus

Antanasijević, R.; Marić, Z.; Vuković, J.; Grabež, B.; Djordjević, D.; Joksimović, D.; Udovičić, V.; Dragić, A.; Stanojevic, Jovica; Banjanac, R.; Joković, D.

doi:10.1016/s1350-4487(03)00145-8

Cited by 15 publications

(8 citation statements)

References 5 publications

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“…In our previous work (Antanasijević et al, 2003) we have shown that the protons are emitted predominantly in the axial direction, similar to the behavior of the deuterium ions. Since the track density in the nuclear track detectors placed in the axial direction reaches saturation level, here we analyze only the fluencies and energy of the axial fast protons using CR-39 detectors.…”

Section: Introductionsupporting

confidence: 58%

Flux and energy distribution of axial protons emitted from the hydrogen plasma focus

Banjanac¹,

Udovičić²,

Grabež³

et al. 2005

Radiation Measurements

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Section: Introductionsupporting

confidence: 58%

Flux and energy distribution of axial protons emitted from the hydrogen plasma focus

Banjanac¹,

Udovičić²,

Grabež³

et al. 2005

Radiation Measurements

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“…On the other side, the experiments with the hydrogen as a working gas show that the accelerated protons can achieve energy up to 500 keV with the total proton yield of (1.1 ± 0.2) × 10 9 per shot [16]. The spatial distribution of the accelerated protons shows anisotropy similar to that of deuterium ions [17]. The overall intensity and angular distribution of high-energy protons give the chance to study nuclear reactions ( 7 Li (p, α) 4 He, 11 B (p, α) 2 4 He).…”

Section: Resultsmentioning

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%

Plasma Focus Studies in Serbia

Udovičić¹,

Veselinović²,

Joksimović³

et al. 2014

JMP

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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.

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“…A dense plasma focus device (PFD) emits high-energy ions generally believed to be emitted from the anode top within a small solid angle around the z axis, for which generation mechanisms are yet to be understood, although different theories and models have been advanced (Sadowski et al 1988; Antanasijević et al 2003; Soto 2005; Lee and Saw 2013). Recently, in a chain of emission studies of ions such as hydrogen, deuterium, and helium in a Mather-type 3.5 kJ PFD (Sohrabi et al 2016; Sohrabi 2017, 2018; Sohrabi and Zarinshad 2020; Soltani et al 2019; Sohrabi et al 2020a and b; Sohrabi and Soltani 2021), it was hypothesized and discovered that ions in PFD space are emitted in near 4π geometry from the “anode top” as intense “point ion source” and from “anode cathodes assembly” (ACA) as a “line ion source” with radial run-away ions, based on which the “Two-sources Ion Emission Model” was proposed (Sohrabi et al 2016; Sohrabi et al 2020a).…”

Section: Introductionmentioning

confidence: 99%

Discovery of Third Possible Ion Generating Source in 4π Plasma Focus Device Space

Sohrabi

2022

Health Physics

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Discovery of a possible third source of ion generation in 4π Plasma Focus Device (PFD) space is reported. Unexpected observation of dense ion tracks, called “On Shadow Ion Tracks” (OSIT), on the “ion cathode shadows” (ICS) was discovered. These ions were formed on panorama mega-size cylindrical polycarbonate ion image detectors placed behind the cathodes in the PFD space on PFD wall, where no ion tracks are expected to exist. Such unexpected ion tracks were observed when different gases were used, in particular hydrogen, deuterium, and helium. An ICS is formed on the detector when each cathode shadows and removes all ions bombarding it from the “anode top” and “anode cathodes assembly.” Such ion tracks forming the OSITs seem to be generated not from the “anode top” and “a node cathodes assembly” but also from a third possible ion source in PFD space bombarding the detector.

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Angular distribution of protons emitted from the hydrogen plasma focus

Cited by 15 publications

References 5 publications

Flux and energy distribution of axial protons emitted from the hydrogen plasma focus

Flux and energy distribution of axial protons emitted from the hydrogen plasma focus

Plasma Focus Studies in Serbia

Discovery of Third Possible Ion Generating Source in 4π Plasma Focus Device Space

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