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Collisional Merging Process of Field-Reversed Configuration Plasmas in the FAT-CM Device

Fumiyuki TANAKA, Tomohiko ASAI, Junichi SEKIGUCHI, Tsutomu TAKAHASHI, Junpei ISHIWATA, Takahiro EDO, Naoto ONO, Keisuke MATSUI, Shintarou WATANABE, Daiki HISHIDA, Daichi KOBAYASHI, Yousuke HIROSE (+7 others)
2018 Plasma and Fusion Research  
In order to investigate the collisional merging process of field-reversed configurations (FRCs), the FAT device has recently been upgraded to FAT-CM, consisting of two field-reversed theta-pinch (FRTP)  ...  Steeper magnetic field gradient by a strong mirror field appears to suppress the axial expansion of collided FRCs and lead a merged FRC to higher temperature.  ...  Introduction A field-reversed configuration (FRC) is a compact toroid (CT) that has predominantly poloidal magnetic field with zero or small amount of self-generated toroidal field [1, 2] .  ... 
doi:10.1585/pfr.13.3402098 fatcat:tffmeldy6bbx7l3lho5wqwp54u

Particle Simulation of Controlling Particle and Heat Flux by Magnetic Field

Trang LE, Yasuhiro SUZUKI, Hiroki HASEGAWA, Toseo MORITAKA, Hiroaki OHTANI
2021 Plasma and Fusion Research  
This magnetic field is localized and switched from strong negative values to strong positive values at several locations in the simulation region.  ...  Based on the modeling results, external localized-reversed magnetic fields can control the particle and heat fluxes to the wall.  ...  Seiji Ishiguro (NIFS) for all of the suggestions and discussions on the development of PIC simulation. Many thanks to Dr. Gakushi Kawamura (NIFS) for valuable comments and support.  ... 
doi:10.1585/pfr.16.1401103 fatcat:5rzf4m2klnfbfgkpfo5do3z2oa

Neutral Beam Injection System for the CAT Experiment

Vladimir I. DAVYDENKO, Petr P. DEICHULI, Alexander A. IVANOV, Sergey V. MURAKHTIN
2019 Plasma and Fusion Research  
Reverse of magnetic field in the plasmoid is also possible in this experiment.  ...  In the Budker Institute, the CAT (Compact Axisymmtric Toroid) experiment is being prepared for obtaining a plasmoid with high diamagnetism in axially symmetric magnetic field.  ...  Simulations show that accumulation of fast ions would provide the initial 0.3 T field reversal within the first 0.3 -0.5 ms of injection.  ... 
doi:10.1585/pfr.14.2402024 fatcat:ojot75e2sbcdjeu5wri4t2b4re

Suppressed ion-scale turbulence in a hot high-β plasma

L. Schmitz, D. P. Fulton, E. Ruskov, C. Lau, B. H. Deng, T. Tajima, M. W. Binderbauer, I. Holod, Z. Lin, H. Gota, M. Tuszewski, S. A. Dettrick (+1 others)
2016 Nature Communications  
An economic magnetic fusion reactor favours a high ratio of plasma kinetic pressure to magnetic pressure in a well-confined, hot plasma with low thermal losses across the confining magnetic field.  ...  Field-reversed configuration (FRC) plasmas are potentially attractive as a reactor concept, achieving high plasma pressure in a simple axisymmetric geometry.  ...  where R is the characteristic magnetic field reversal (null field) radius.  ... 
doi:10.1038/ncomms13860 pmid:28000675 pmcid:PMC5187751 fatcat:2f3vauldkzbk3fdry6nylqdauq

The Axial Expansion of a Field-Reversed Configuration Plasma as Induced by Neutral-Beam-Injected Fast Ions

Toshiki TAKAHASHI, Naotaka IWASAWA, Takayuki KATO, Yoshiomi KONDOH
2006 Plasma and Fusion Research  
An axially expanding motion of a field-reversed configuration plasma can be observed numerically.  ...  The diamagnetic beam current formed around the x-points and in the open-field region reduces the magnetic pressure, and then the plasma is found to expand axially.  ...  The external magnetic field B ex and the wall radius r w are 0.05 T and 0.4 m, respectively; they are identical to those obtained with the FIX machine. The mirror ratio R M is about 2.  ... 
doi:10.1585/pfr.1.022 fatcat:izkefgurebbkzcgel5uffy7t5u

Electron-cyclotron waves in large-scale open traps: new questions highlighted by recent experiments

Alexander Shalashov, A.G. Litvak
2017 EPJ Web of Conferences  
The radiation is launched obliquely through a side of a plasma column at high magnetic field (close to the magnetic mirror).  ...  Another class of next-step devices, advanced reversed-field-configurations [25, 26] , is characterized by even more high values of β ~ 1. For electrodynamics, this implies ω ce << ω pe .  ... 
doi:10.1051/epjconf/201714903005 fatcat:45ge3lklw5alxcmdgd7v4dhvay

Time Evolution of the Magnetic Structure of a Field-Reversed Configuration in a Super-Alfvénic Translation Process

Tomohiko ASAI, Shunsuke AKAGAWA, Kazuhiro AKIMOTO, Naoki TADA, Tsutomu TAKAHASHI, Hiroyasu TAZAWA
2011 Plasma and Fusion Research  
A deceleration force produced by the induced currents equals to approximately 10% of the acceleration one generated by the gradient of the magnetic guide field.  ...  Acknowledgements The support from Fusion Plasma Laboratory, Nihon University, is gratefully acknowledged.  ...  Introduction A field-reversed configuration (FRC) plasma is a compact toroid with no significant toroidal magnetic field.  ... 
doi:10.1585/pfr.6.2402151 fatcat:ftjxpa5byzhqbkpfxwlz2t7hli

Negative ion beam requirements for compact tori

George H. Miley
1984 AIP Conference Proceedings  
One potential application of negative ion beam sources involves injection into field-reversed fusion devices for both start-up and sustainment of plasma currents.  ...  A hybrid fluid-particle computational model is described that has been developed to study injection into a field-reversed mirror.  ...  Figure 1 . 1 Typical Field-Reversed Mirror Plasma Geometry. Figure 2 . 2 Magnetic Field Configuration.  ... 
doi:10.1063/1.34393 fatcat:z2ouukjzyvavniv2lfehqwdet4

Magnetically-Channeled SIEC Array (MCSA) Fusion Device for Interplanetary Missions

G. H. Miley
2004 AIP Conference Proceedings  
MAGNETICALLY-CHANNELED SIEC ARRAY (MCSA) CONCEPT The SIEC device represents a very attractive approach to fusion power due to its' high power density combined with a simple lightweight structure.  ...  However, the need for an internal grid and a limited confinement time has prompted several researchers to seek an alternative configuration that combines the SIEC and magnetic fields. Thus, R. W.  ...  Important contributions by the other workers in the fusion studies lab, especially Linchun Wu, Huyng Jin Kim, and Yang Yang are gratefully acknowledged.  ... 
doi:10.1063/1.1649598 fatcat:tmyg2yy7l5eujphw5k7depy6di

Electrostatic Potential Measurements And Point Cusp Theories Applied To A Low Beta Polywell Fusion Device

Matthew Carr, Joe Khachan
2013 Zenodo  
The magnetic field structure in a Polywell device is studied to understand both the physics underlying the electron confinement properties and its estimated performance compared to other cusped devices  ...  Analytical expressions are presented for the magnetic field in addition to expressions for the point and line cusps as a function of device parameters.  ...  Mirror Machines The simplest magnetic mirror device is created by using two solenoidal coils in a magnetic field configuration known as the Magnetic Mirror Machine, see Figure 1 .4 for an annotated example  ... 
doi:10.5281/zenodo.1244066 fatcat:yiykdbyeqrdqlmsnq2cmvm434q

Wave–particle interactions in rotating mirrors

Abraham J. Fetterman, Nathaniel J. Fisch
2011 Physics of Plasmas  
This eliminates the need for electrodes in the mirror throat, which have presented serious technical issues in past rotating plasma devices.  ...  A particularly simple way to achieve this effect is to use a high azimuthal mode number perturbation on the magnetic field.  ...  Simulations of alpha channeling with stationary waves demonstrate that enough energy can be recovered from alpha particles to make the rotating mirror fusion reactor self-sustaining. 16 Using four wave  ... 
doi:10.1063/1.3567417 fatcat:p7u4o7gf6ngzpccfcy4hopt5oq

Studies of Plasma Confinement and Stability in a Gas Dynamic Trap: Results of 2016 - 2018

2019 Plasma and Fusion Research  
of thermonuclear applications of linear magnetic traps.  ...  Paper presents a brief overview of the studies carried out in 2016-2018 at the Gas Dynamic Trap device at the Budker Institute.  ...  According to the results of numerical simulation, a peaked distribution of the axial density of the neutron flux can be formed with an oblique injection of neutral beams and an axial magnetic field profile  ... 
doi:10.1585/pfr.14.2402030 fatcat:hczcllntofaefaum4ncnatxs54

Implosion of solid liner for compression of field reversed configuration

J.H. Degnan, J.M. Taccetti, T. Cavazos, D. Clark, S.K. Coffey, R.J. Faehl, M.H. Frese, D. Fulton, J.C. Gueits, D. Gale, T.W. Hussey, T.P. Intrator (+18 others)
2001 IEEE Transactions on Plasma Science  
Index Terms-Capacitor bank, field reversed configuration, FRC, implosion, magnetized target fusion, megamp, MTF, radiography, solid liner.  ...  (FRCs) to magnetized target fusion (MTF) conditions.  ...  as mirrors, tokamaks and a reversed field pinch.  ... 
doi:10.1109/27.912947 fatcat:bwen2l73bvbibfq7dfkg76ztkq

Investigation of ICRF Heating Efficiency in Plug/Barrier Cell on GAMMA 10/PDX with a Full-Wave Code

Yushi KUBOTA, Mafumi HIRATA, Seowon JANG, Makoto ICHIMURA, Ryuya IKEZOE, Mizuki SAKAMOTO, Shuhei SUMIDA, Atsuto TANAKA, Koki IZUMI, Ryo SEKINE, Hiroki KAYANO, Yousuke NAKASHIMA (+1 others)
2019 Plasma and Fusion Research  
In the west end of GAMMA 10/PDX, the end-loss ion flux is utilized for divertor simulation experiments.  ...  The experimental results are consistent with the simulation of the wave propagation analysis.  ...  This work was partly supported by the bidirectional collaborative research program of the National Institute for Fusion Science, Japan (NIFS14KUGM086 and NIFS17KUGM132).  ... 
doi:10.1585/pfr.14.2401012 fatcat:gs5hir65trf2thtwzbyrd3ujlq

Fluid simulation of plasmas with anisotropic ion pressure in an inhomogeneous magnetic field of a tandem mirror device GAMMA 10/PDX

Satoshi Togo, Naomichi Ezumi, Mizuki Sakamoto, Tsukasa Sugiyama, Kosuke Takanashi, Tomonori Takizuka, Kenzo Ibano
2022 Journal of Advanced Simulation in Science and Engineering  
It is also shown that treating the anisotropic ion pressure can facilitate the understanding of the behavior of high temperature plasmas in inhomogeneous magnetic fields compared to a conventional model  ...  Linear and mirror devices have been playing important roles in simulation experiments of SOL-divertor plasmas of circular fusion devices [4] .  ...  A field-reversed configuration (FRC) device C-2W generates plasmas with > 2.5 keV ion temperature and > 500 eV electron temperature by a strong mirror field suggesting an alternative approach to magnetically  ... 
doi:10.15748/jasse.9.185 fatcat:p4xl7cqp4reklohzmmgzccmwv4
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