| 1. |
- Andriash, A. V., et al.
(författare)
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Stochastic simulation of the nonlinear kinetic equation with high-frequency electromagnetic fields
- 2013
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Ingår i: PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. - : KHARKOV INST PHYSICS & TECHNOLOGY, NATL SCIENCE CTR. - 1562-6016. ; :4, s. 233-237
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Tidskriftsartikel (refereegranskat)abstract
- A general approach to Monte Carlo methods for Coulomb collisions is proposed. Its key idea is an approximation of Landau-Fokker-Planck (LFP) equations by Boltzmann equations of quasi-Maxwellian kind. High-frequency fields are included into consideration and comparison with the well-known results are given.
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| 2. |
- Chernitskiy, S. V., et al.
(författare)
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A fuel cycle for minor actinides burning in a stellarator-mirror fusion-fission hybrid
- 2017
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Ingår i: PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. - : KHARKOV INST PHYSICS & TECHNOLOGY. - 1562-6016. ; :1, s. 36-39
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Tidskriftsartikel (refereegranskat)abstract
- The MCNPX Monte-Carlo code has been used to model a concept of a fusion-fission stellarator-mirror hybrid aimed for transmutation transuranic content from the spent nuclear fuel. A fuel cycle for the subcritical fusion-fission hybrid is investigated and discussed.
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| 3. |
- Chernitskiy, S. V., et al.
(författare)
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Minor actinides burning in a stellarator-mirror fusion-fission hybrid
- 2015
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Ingår i: Problems of Atomic Science and Technology. - 1562-6016. ; :1, s. 20-23
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Tidskriftsartikel (refereegranskat)abstract
- The MCNPX Monte-Carlo code has been used to model a compact concept of a fusion-fission reactor based on a combined stellarator-mirror trap for transmutation transuranic elements from the spent nuclear fuel. Calculation results for fission rates for transuranic elements are presented.
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| 4. |
- Chernitskiy, S. V., et al.
(författare)
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Neutronic Model Of A Fusion Neutron Source
- 2013
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Ingår i: Problems of Atomic Science and Technology. - 1562-6016. ; :1, s. 61-63
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Tidskriftsartikel (refereegranskat)abstract
- The MCNPX numerical code has been used to model a fusion neutron source based on a combined stellarator-mirror trap. Calculation results for the neutron spectrum near the inner wall and radial leakage of neutrons through the mantle surface of the fusion neutron source are presented.
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| 5. |
- Chernitskiy, S. V., et al.
(författare)
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Neutronic Model of a Stellarator-Mirror Fusion-Fission Hybrid
- 2012
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Ingår i: PROBL ATOM SCI TECH. - 1562-6016. ; :6, s. 58-60
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Tidskriftsartikel (refereegranskat)abstract
- The MCNPX numerical code has been used to model a compact concept for a fusion-fission reactor based on a combined stellarator-mirror trap. Calculation results for the radial leakage of neutrons through the mantle surface of the fission reactor are presented.
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| 6. |
- Chernitskiy, S. V., et al.
(författare)
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Static Neutronic Calculation of a Fusion Neutron Source
- 2014
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Ingår i: Problems of Atomic Science and Technology. - 1562-6016. ; :6, s. 12-15
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Tidskriftsartikel (refereegranskat)abstract
- The MCNPX numerical code has been used to model a fusion neutron source based on a combined stellarator-mirror trap. Calculation results for the neutron flux and spectrum inside the first wall are presented. Heat load and irradiation damage on the first wall are calculated.
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| 7. |
- Ganenko, V., et al.
(författare)
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Production of linearly polarized photon beam at MAX-lab
- 2009
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Ingår i: Voprosy Atomnoj Nauki i Techniki. - 1562-6016. ; :3, s. 95-102
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Tidskriftsartikel (refereegranskat)abstract
- Spectra of coherent bremsstrahlung from the diamond crystal in the laboratory MAX-lab on the accelerator MAX-I are measured at the energy of the electronic beam 144 MeV. First in the laboratory MAX-lab a source of the polarized photon radiation was created. Photon spectra were compared with theoretical calculations, that allow to estimate a magnitude of photon polarization, which is sufficient, for performing the nuclear experiments in the intermediate energy range.
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| 8. |
- Kotenko, V. G., et al.
(författare)
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Magnetic Surfaces of a Combined Magnetic System
- 2012
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Ingår i: PROBL ATOM SCI TECH. - 1562-6016. ; :6, s. 22-24
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Tidskriftsartikel (refereegranskat)abstract
- The existence of closed magnetic surfaces in a model of the combined magnetic system is shown by numerical simulations. The numeric model contains a magnetic system of the l = 2 torsatron with the coils of an additional toroidal magnetic field and the mirror-type magnetic system. The mirror-type magnetic system is realized by switching off one of the coils of an additional toroidal magnetic field.
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| 9. |
- Marchuk, Yu.M., et al.
(författare)
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Computer calculation of probability for binary collisions of electrons with ions and molecules
- 2021
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Ingår i: Problems of Atomic Science and Technology. - : National Science Center, Kharkov Institute of Physics and Technology. - 1562-6016. ; 134:4, s. 154-156
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Tidskriftsartikel (refereegranskat)abstract
- Computer calculation of rate coefficient for binary collision as a function of temperature is presented, and the Maxwell electron velocity distribution function is chosen. The finite elements of the fifth order made it possible to significantly speed up the process of calculation . The result of the approximation is a smooth function and the values of this function, its first and second derivatives, have no jumps at the mesh nodes and the accuracy of calculation is within the limits of statistical errors for the source data. These advantages and the results will be used in future tasks.
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| 10. |
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| 11. |
- Moiseenko, V. E., et al.
(författare)
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Fast Trapped Particle Motion In Uragan-2M Stellarator With Embedded Magnetic Mirror
- 2014
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Ingår i: Problems of Atomic Science and Technology. - 1562-6016. ; :6, s. 26-29
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Tidskriftsartikel (refereegranskat)abstract
- The magnetic configuration of a stellarator with an embedded magnetic mirror is arranged in the Uragan-2M experimental device by switching off one toroidal coil. The motion of particles magnetically trapped in the embedded mirror is analyzed numerically with use of motional invariants. It is found that without electric field the particle quickly drift out of the mirror. Sufficiently small radial electric field can make the drift trajectories closed that substantially improve particle confinement. It is remarkable that the improvement acts both for positive and negative charges.
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| 12. |
- Moiseenko, Vladimir E., et al.
(författare)
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Fusion with fission power amplification
- 2008
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Ingår i: Problems of atomic science and technology. - 1562-6016. ; :6, s. 55-57
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Tidskriftsartikel (refereegranskat)abstract
- A scheme of a sub-critical system driven by fusion neutrons from a stellarator-mirror device is considered. In addition, a power production scheme which uses fusion power amplification by depleted uranium mantle is discussed.
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| 13. |
- Moiseenko, Vladimir E., et al.
(författare)
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Multiple recycle fuel cycle for spent nuclear fuel components incineration in fusion-fission hybrid
- 2022
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Ingår i: Problems of Atomic Science and Technology. - : Problems of Atomic Science and Technology. - 1562-6016. ; :6, s. 40-43
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Tidskriftsartikel (refereegranskat)abstract
- A multiple recycle fuel cycle (MRFC) is analyzed using a simple numerical model. A straightforward approach to MRFC has some unfavorable features like strong variation of the neutron multiplication factor and accumulation of americium isotopes which would likely hamper its practical usage. A solution proposed here is addition of 238U both to initial fuel and the recycled fuel.
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| 14. |
- Moiseenko, V. E., et al.
(författare)
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Stellator research at IPP KIPT : Status and prospects
- 2019
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Ingår i: PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. - : KHARKOV INST PHYSICS & TECHNOLOGY. - 1562-6016. ; :1, s. 3-8
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Tidskriftsartikel (refereegranskat)abstract
- Features of the recent Uragan-2M campaign are reviewed together with some theoretical advances. They include experiments with B4C limiter, studies of various 1. . . 20 kHz oscillations, development of a new in-situ diagnostics for wall conditions, i.e. the thermal desorption probe, the improved numerical model of RF plasma production in stellarators in the ion cyclotron and electron-cyclotron frequency ranges, a new positive-definite form of time-harmonic Maxwell's equations and plasma start-up studies.
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| 15. |
- Moiseyenko, Volodymyr, et al.
(författare)
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FUSION RESEARCH IN STELLARATOR DEPARTMENT OF IPP NSC KIPT
- 2022
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Ingår i: PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. - : Problems of Atomic Science and Technology. - 1562-6016. ; :6, s. 3-8, s. 3-8
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Tidskriftsartikel (refereegranskat)abstract
- This paper briefly describes intrinsic and collaborative scientific activities in the Stellarator Department of the Institute of Plasma Physics of the National Science Center "Kharkov Institute of Physics and Technology" in last two years. These activities include experiments on JET tokamak, stellarators Wendelstein 7-X and Uragan-2M, TOMAS toroidal device and theoretical studies related to modeling of radio-frequency fields in plasma and conceptual development of the stellarator-mirror fission-fusion hybrid.
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| 16. |
- Opanasenko, A. M., et al.
(författare)
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Multislice Model Of Electron Bunch For Study Of Ballistic Bunching Of Low Emittance Beams
- 2018
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Ingår i: Problems Of Atomic Science And Technology. - 1562-6016. ; :3, s. 73-80
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Tidskriftsartikel (refereegranskat)abstract
- At ballistic bunching of an electron beam the transverse distribution of space-charge field varies along a bunch greatly. It can lead to emittance growth unless to provide its compensation. To study this problem, a multislice model of a bunch of relativistic charged particles that needs no smallness of energy spread between slices are developed. This removes the limit on the value of the RF field that modulates the slices by velocity before their injection into a drift space. The longitudinal dynamics of each slice is determined by its interaction with the field of the entire bunch averaged over the slice. Transverse beam characteristics are found from a differential equation for root-mean-square envelope of a beam.
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| 17. |
- Terentyev, D., et al.
(författare)
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Aspects Of Radiation Damage Effects In Fe-Cr Alloys From The Point Of View Of Atomistic Modeling
- 2009
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Ingår i: PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. - 1562-6016. ; :4, s. 68-79
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Tidskriftsartikel (refereegranskat)abstract
- Fe-Cr alloys are the basis of high-Cr ferritic steels, which are the candidates for the structural materials for near future power plants. Recently, a significant effort has been put in the development of theoretical models dealing with the response of Fe-Cr alloys to irradiation. Here, we give a brief overview of the current level of understanding of radiation damage in Fe-Cr alloys, based on the most recent results. In particular, we review and summarize data obtained using different atomistic modelling techniques in order to refine the most important findings achieved over the past few years.
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| 18. |
- Ågren, Olov, et al.
(författare)
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Coil design for the straight field line mirror
- 2022
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Ingår i: Problems of Atomic Science and Technology. - : Problems of Atomic Science and Technology. - 1562-6016. ; :6, s. 13-15
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Tidskriftsartikel (refereegranskat)abstract
- This paper briefly describes numerical design of 3D super-conduction coils aimed to mimic analytically derived magnetic field for the Straight Field Line Mirror (SFLM) concept. The paper is based on a manuscript for a previous IAEA report, i.e. IAEA-TECDOC-1998.
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| 19. |
- Ågren, Olov, et al.
(författare)
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Conceptual study of a straight field line mirror hybrid reactor
- 2011
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Ingår i: Problems of Atomic Science and Technology. - 1562-6016. ; :1, s. 3-7
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Tidskriftsartikel (refereegranskat)abstract
- A hybrid reactor based on the straight field line mirror (SFLM) with magnetic expanders at the ends is proposed as a compact device for transmutation of nuclear waste and power production. Compared to a fusion reactor, plasma confinement demands can be relaxed if there is a strong energy multiplication by the fission reactions, i.e. Q(r)=Pfission/Pfusion >> 1. The values of Q(r) is primarily restricted by fission reactor safety requirements. For the SFLM, computations suggest that values of Q(r) ranging up to 150 are consistent with reactor safety. In a mirror hybrid device with Q(r) > 100, the lower bound on the electron temperature for power production can then be estimated to be around 400 eV, which may be achievable for a mirror machine. The SFLM with its quadrupolar stabilizing fields does not rely on plasma flow into the expanders for MED stability, and a scenario with plasma density depletion in the expanders is a possibility to increase the electron temperature. Efficient power production is predicted with a fusion Q= 0.15 and an electron temperature around 500 eV. A fusion power of 10 MW could then be amplified to 1.5 GW fission power in a compact 25 m long hybrid mirror machine. Beneficial features are that all sensitive equipment can be located outside the neutron rich region and a steady state power production seems possible. Self circulation of the lead coolant, which is useful for heat removal if coolant pumps cease to operate, could be arranged by orienting the magnetic axis vertically. Results from studies on plasma equilibrium and stability, coil designing, RF heating and neutron computations are presented.
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| 20. |
- Ågren, Olov, et al.
(författare)
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Steady-state fusion fission reactor concepts based on stellarator-mirror and mirror machines
- 2015
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Ingår i: Problems of Atomic Science and Technology. - 1562-6016. ; :1, s. 3-7
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Tidskriftsartikel (refereegranskat)abstract
- Neutron sources and hybrid reactors offer a possibility for application of fusion in a not too distant future. Steady-state operation on a time scale of a year without interruption is essential for such applications. In response to this need, our studies are focused on concepts which are not limited by pulsed operation. Special attention is put on mirror machines and a stellarator-mirror concept with localized neutron production. Reactor safety, magnetic coils, power amplification by fission, plasma heating, a radial constant of motion which provides a bounded radial motion in the collision free approximation are some of the issues addressed.
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| 21. |
- Ågren, Olov, et al.
(författare)
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The straight field line mirror concept and applications
- 2008
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Ingår i: Problems of Atomic Science and Technology. - 1562-6016. ; :6, s. 8-12
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Tidskriftsartikel (refereegranskat)abstract
- The straight field line mirror field is a marginal minimum B field with straight nonparallel field lines. This field gives optimal ellipticity, the drift surfaces lie on a magnetic surface, radiofrequency heating of the plasma is predicted to be efficient and MHD stability is provided by the minimum B property. One intended application of the magnetic field configuration is energy production and transmutation of spent nuclear fuel in a fusion-fission machine, where the mirror confined plasma is surrounded by a fission mantle. Reactor safety can be increased with a subcritical fission mantle, and the fission power can exceed the fusion power by as much as a factor of 150 with a reasonable condition for reactor safety margins, and this provides a basis for a compact reactor design. The straight field line mirror concept can also be of interest as a plasma source for synthesis of sophisticated materials. PACS: 28.52.Av, 28.41.Ak.
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