Investigation of the Neutron Angular Distribution and Neutron Yield on the APF Plasma Focus Device

Baghdadi, Reza; Amrollahi, R.; Habibi, M.; Etaati, G. R.

doi:10.1007/s10894-010-9347-2

Cited by 12 publications

(5 citation statements)

References 33 publications

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“…Averaged areas under the recorded scintillator signals between shots are represented as hard X-ray intensity to consider both time and voltage expansions. The peak detection and integration of the data were performed by using the SAP-ALCOR 9.20 software which has been developed in AmirKabir Fusion Laboratory [30]. The typical results of HXR measurement in discharge voltage of 11 kV are shown in Figure 5.…”

Section: Experimental Setup and Diagnosticsmentioning

confidence: 99%

Approach to the Highest HXR Yield in Plasma Focus Device Using Adaptive Neurofuzzy Inference System to Optimize Anode Configuration

Mahtab

Taghipour

Roshani

et al. 2014

Journal of Experimental Physics

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Adaptive neurofuzzy inference system (ANFIS) is investigated to optimize the configuration of anode shape in plasma focus devices to achieve the highest X-ray yield. Variables of discharge voltage, filling gas pressure, and angles of anode slopes (Φ1and Φ2) are chosen as input parameters, while the output is designated to be the radiated hard X-ray intensity. The trained ANFIS has achieved good agreement with the experimental results and has mean relative error percentages (MRE%) 1.12% and 2.18% for training and testing data, respectively. The study demonstrates that adaptive neurofuzzy inference system is useful, reliable, and low-cost way to interpret the highest X-ray yield and corresponding anode configuration in plasma focus devices.

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Section: Experimental Setup and Diagnosticsmentioning

confidence: 99%

Approach to the Highest HXR Yield in Plasma Focus Device Using Adaptive Neurofuzzy Inference System to Optimize Anode Configuration

Mahtab

Taghipour

Roshani

et al. 2014

Journal of Experimental Physics

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“…Utilizing this new idea, neutron yield increases from three-to five-fold. To achieve this goal, a 4.5 KJ plasma focus device with the bank of capacitance 40 μF and voltage 15 kV [8] accompanied by magnetic lenses is designed and simulated using Comsol Multiphysics 5.2. The main aims of this paper as follows:…”

Section: Introdutionmentioning

confidence: 99%

High efficiency focus neutron generator

Sadeghi

Amrollahi

Zare

et al. 2017

Plasma Phys. Control. Fusion

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In the present paper, the new idea to increase the neutron yield of plasma focus devices is investigated and the results are presented. Based on many studies, more than 90% of neutrons in plasma focus devices were produced by beam target interactions and only 10% of them were due to thermonuclear reactions. While propounding the new idea, the number of collisions between deuteron ions and deuterium gas atoms were increased remarkably well. The COMSOL Multiphysics 5.2 was used to study the given idea in the known 28 plasma focus devices. In this circumstance, the neutron yield of this system was also obtained and reported. Finally, it was found that in the ENEA device with 1 Hz working frequency, 1.1×10 9 and 1.1×10 11 neutrons per second were produced by D-D and D-T reactions, respectively. In addition, in the NX2 device with 16 Hz working frequency, 1.34×10 10 and 1.34×10 12 neutrons per second were produced by D-D and D-T reactions, respectively. The results show that with regards to the sizes and energy of these devices, they can be used as the efficient neutron generators.

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“…The PF devices can also generate pulsed X-rays, relativistic electron beams and relatively high-energy (up to several MeVs) pulsed ion beams [1][2][3][4]. Although the produced ions are generally emitted within the z-direction of the PF device, there have been reported wide-angle angular distributions of ions [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…Although neutron emission mechanism in PF devices has not been fully interpreted [11] but three different candidate physical models have been studied so far: (1) Neutrons are produced as a result of the thermonuclear fusion reaction in plasma column during instability spread [12]. This model is unable to explain the anisotropy of neutron emission in different angles.…”

Section: Introductionmentioning

confidence: 99%

“…The detection read-out controls and necessary computations become rather complicated when the measurement requires several PF shots. The need for a device to facilitate working in the above mentioned situation has been first introduced by Baghdadi et al [1]. In their report, it is discussed that the angular distribution of neutron emission and also the neutron yield determination need at least seven detectors with the following characteristics: (1) independent calibration process for every detector; (2) independent neutron yield measurement and data storage for every detector; (3) output signal read-outs for up to 10 detectors; (4) programmability with different time algorithms that can be defined by user.…”

Section: Introductionmentioning

confidence: 99%

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Design and Fabrication of a Data Acquisition System for Pulsed Neutron Flux Measurement of Plasma Focus Devices

et al. 2014

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Silver-activated Geiger counters together with a polyethylene layer as neutron moderator are frequently used in pulsed neutron flux measurements in research studies with plasma focus (PF) devices. In this study, an array of seven counters was used at seven different angles (0°, ±30°, ±60°a nd ±90°) to the PF-axis for which a software and a 10-channel data acquisition hardware (PCT2660) compatible with NIM standards have been designed and fabricated. In the proposed PCT2660, the preset timing algorithms are considered as general and they can be programmed for required detector calibrations and neutron flux measurements. The calibration constant measurement has been undertaken with a 16.5 Ci Am-Be source of 35 mm diameter by 70 mm cylindrical active volume located at anode top whilst the neutron flux at zero degree of PF device axis at 13.5 kV operating voltage and 13.54 9 10 -2 PSI pressure is measured as (2.88 ± 0.29) 9 10 8 neutrons per shot. Accordingly, the studies on the angular distribution of the PF neutron emission within the pressure range of 7.73 9 10 -2 -15.47 9 10 -2 PSI confirm an anisotropy ranging from 1.53 ± 0.09 to 2.95 ± 0.24 and a symmetry of angular distribution around the anode axis.

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Investigation of the Neutron Angular Distribution and Neutron Yield on the APF Plasma Focus Device

Cited by 12 publications

References 33 publications

Approach to the Highest HXR Yield in Plasma Focus Device Using Adaptive Neurofuzzy Inference System to Optimize Anode Configuration

Approach to the Highest HXR Yield in Plasma Focus Device Using Adaptive Neurofuzzy Inference System to Optimize Anode Configuration

High efficiency focus neutron generator

Design and Fabrication of a Data Acquisition System for Pulsed Neutron Flux Measurement of Plasma Focus Devices

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