Estimation of Amount of Scattered Neutrons at Devices PFZ and GIT-12 by MCNP Simulations

Our work is dedicated to pinch effect occurring during current discharge in deuterium plasma, and our results are connected with two devices – plasma focus PFZ, situated in the Faculty of Electrical Engineering, CTU, Prague, and Z-pinch GIT-12, which is situated in the Institute of High Current Electronics, Tomsk. During fusion reactions that proceed in plasma during discharge, neutrons are produced. We use neutrons as instrument for plasma diagnostics. Despite of the advantage that neutrons do not interact with electric and magnetic fields inside device, they are inevitably scattered by materials that are placed between their source and probe, and information about plasma from which they come from is distorted. For estimation of rate of neutron scattering we use MCNP code.

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Experimental investigation of dd reaction in range of ultralow energies using Z-pinch

Laser and Particle Beams ◽

10.1017/s0263034600182230 ◽

2000 ◽

Vol 18 (2) ◽

pp. 325-333 ◽

Cited By ~ 16

Author(s):

V.M. BYSTRITSKY ◽

V.M. GREBENYUK ◽

S.S. PARZHITSKI ◽

F.M. PEN'KOV ◽

V.T. SIDOROV ◽

...

Keyword(s):

Cross Sections ◽

Collision Energy ◽

Reaction Cross ◽

High Current ◽

High Current Electronics ◽

Upper Limits ◽

Fusion Neutrons ◽

Scintillator Detectors ◽

Z Pinch ◽

Reaction Cross Sections

Experimental results on measurement of dd-reaction cross sections in the energy range of 0.1–1.5 keV using the Z-pinch technique are presented. The experiment was fulfilled at the high current generator of the High-Current Electronics Institute, city of Tomsk, Russia. The dd-fusion neutrons were registered by time-of-flight scintillator detectors and BF3 detectors of thermal neutrons. The estimates were obtained at 90% of the confidence level for the upper limits of the neutron-producing dd-reaction cross sections for average deuteron collision energies of 0.11, 0.34, 0.37, and 1.46 keV. These results substantiate feasibility to get a cross section magnitude for dd-reaction in the range of the collision energy of 0.8–3 keV using similar technology at the pulse current level of 2–3 MA.

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Imaging of Fusion Protons from a 3 kJ Deuterium Plasma Focus

Japanese Journal of Applied Physics ◽

10.1143/jjap.44.4117 ◽

2005 ◽

Vol 44 (6A) ◽

pp. 4117-4121 ◽

Cited By ~ 5

Author(s):

Stuart Victor Springham ◽

Siew Pheng Moo ◽

Paul Lee ◽

Rajdeep Singh Rawat ◽

Alin Constantin Patran ◽

...

Keyword(s):

Plasma Focus ◽

Deuterium Plasma

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Study of moderate-Z pinch performance relevant to high current drivers

IEEE Conference Record - Abstracts. PPPS-2001 Pulsed Power Plasma Science 2001. 28th IEEE International Conference on Plasma Science and 13th IEEE International Pulsed Power Conference (Cat. No.01CH37255) ◽

10.1109/ppps.2001.960789 ◽

2002 ◽

Author(s):

G.C. Idzorek ◽

R.E. Chrien ◽

D.L. Peterson ◽

R.G. Watt ◽

G.A. Chandler ◽

...

Keyword(s):

High Current ◽

Z Pinch

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Fusion reactions in a plasma focus operated with3He-D2and4He-D2gas mixtures

Physica Scripta ◽

10.1088/0031-8949/2006/t123/018 ◽

2006 ◽

Vol T123 ◽

pp. 124-130 ◽

Cited By ~ 2

Author(s):

S V Springham ◽

T H Sim ◽

P Lee ◽

A Patran ◽

R S Rawat ◽

...

Keyword(s):

Plasma Focus ◽

Fusion Reactions

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Features of damage and modification of surface layers of Al and its alloys by powerful energy flows in a plasma focus device

Perspektivnye Materialy ◽

10.30791/1028-978x-2021-9-34-52 ◽

2021 ◽

Vol 9 ◽

pp. 34-52

Author(s):

V. N. Pimenov ◽

◽

S.A. Maslyaev ◽

Keyword(s):

Surface Layer ◽

Plasma Focus ◽

Phase State ◽

Structural Phase ◽

Pulsed Laser ◽

Plasma Focus Device ◽

Deuterium Plasma ◽

Surface Layers ◽

Pulsed Laser Radiation ◽

Structural Phase State

The results of the analysis of damageability and modification of the structural-phase state of the surface layers of aluminum and its alloys by powerful flows of fast high-energy ions and high-temperature plasma in Plasma focus devices, as well as using pulsed laser radiation. Pure Al, an alloy of the Al – Mg – Li system, a duralumin alloy, and a composition of a ceramic coating Al2O3 on an Al substrate are considered. It is shown that in the regime of Al irradiation with a power density of q ≈ 106 – 107 W/cm2 in the nano- and microsecond range of pulse durations, ultrafast crystallization of melted surface layer occurs with the formation of a wavy surface relief and the structural fragments of sub-microcrystalline and nanoscale size. After the action of deuterium plasma flows on a duralumin alloy tube located along the axis of the Plasma focus device a modification of the structural-phase state of the alloy is observed: the initial two-phase state of an αAl-solid solution of copper in aluminum and inclusions of the second phase of CuAl2 became fine-grained and single-phase due to the dissolution of CuAl2 particles in the melt. Irradiation of an alloy of the Al – Mg – Li system containing (wt %) 2 % Li and 5 % Mg at q = 5·106 W/cm2, t = 50 – 100 ns after four pulsed impacts of fast ions and deuterium plasma led to the modification the structural-phase state of the surface layer of the alloy, associated with an increase in the content of magnesium oxide and a decrease in the crystal lattice parameter of the Al-based solid solution. The formation of spherical cavities due to the evaporation of lithium into the internal micropores of the surface layer was also found. The low damage and structural stability of Al2O3 ceramics on an Al substrate under beam-plasma impacts in plasma focus device with a radiation power density q ≤ 108 – 109 W/cm2 in the nano- and microsecond range of pulse duration is noted. At the same time, the Al2O3/Al composition was unstable to pulsed laser radiation in the free-running mode (q = 105 – 106 W/cm2, t = 0.7 ms) and Q-switch mode (q = 107 – 108 W/cm2, t = 80 ns). In both cases the coating peeled off from the substrate.

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