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[en] The separatrix radius can be increased by application of external mirror field. This is concluded by a thought experiment and confirmed numerically. The radius depends not only on the average beta ratio <β> but also on configuration of the applied external field and the separatrix length. With restriction to a class of external field, an approximate formula giving the radius as a function of <β> and mirror ratio of the external field is proposed for configurations such that the separatrix ends are near the externally applied mirrors. Dependence of the radius on the separatrix length is also studied numerically. Its maximum value is explained with use of a thin plasma model. (author)
Journal
No abstract available
Source
Rossijskaya Akademiya Nauk, Moscow (Russian Federation); Gosudarstvennaya Korporatsiya Rosatom, Moscow (Russian Federation); Inst. Obshchej Fiziki im. A.M. Prokhorova RAN, Moscow (Russian Federation); Ob''edinennyj Inst. Vysokikh Temperatur RAN, Moscow (Russian Federation); Nauchnyj Sovet RAN po Fizike Plazmy, Moscow (Russian Federation); Nauchnyj Sovet RAN po Kompleksnoj Probleme «Fizika Nizkotemperaturnoj Plazmy», Moscow (Russian Federation); Gosudarstvennyj Nauchnyj Tsentr RF TRINITI, Moscow, Troitsk (Russian Federation); Nauchno-Tekhnologicheskij Tsentr PLASMAIOFAN, Moscow (Russian Federation); Natsional'nyj Issledovatel'skij Yadernyj Univ. «MIFI», Moscow (Russian Federation); Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Moscow (Russian Federation); 230 p; ISBN 978-5-6042115-6-4; 
; 2022; p. 86; XLIX International Zvenigorod conference on plasma physics and controlled fusion ICPAF-2022; XLIX Mezhdunarodnaya Zvenigorodskaya konferentsiya po fizike plazmy i upravlyaemomu termoyadernomu sintezu ICPAF-2022; Moscow (Russian Federation); 14-18 Mar 2022; 5 refs.
; 2022; p. 86; XLIX International Zvenigorod conference on plasma physics and controlled fusion ICPAF-2022; XLIX Mezhdunarodnaya Zvenigorodskaya konferentsiya po fizike plazmy i upravlyaemomu termoyadernomu sintezu ICPAF-2022; Moscow (Russian Federation); 14-18 Mar 2022; 5 refs.
[en] A summary of recent developments in mirror fusion research is presented, including highlights of recent experiments on the tandem mirror GAMMA-10 (Tsukuba), HIEI (Kyoto), AMBAL-M (Novosibirsk) and gas-dynamic trap GDT (Novosibirsk). Considerable progress in both the plasma parameters and in the understanding of the underlying physics has been reported. Possible applications of mirror devices as high-flux neutron sources and as divertor simulators are discussed. Speculations on the possible impact of technological breakthroughs on the prospects of mirror-based systems are presented. The many potential advantages of mirror fusion power systems are recapitulated. (author)
Journal
Comments on Plasma Physics and Controlled Fusion; ISSN 0374-2806; ; CODEN CPCFBJ; v. 16(6); p. 375-399
; CODEN CPCFBJ; v. 16(6); p. 375-399
[en] The significance of basic experiments on field-aligned plasma-potential structure formed by local electron cyclotron resonance (ECR) is claimed based on the historical development of the investigation on electric double layer and electrostatic potential confinement of open-ended fusion-oriented plasmas. In the presence of a single ECR point in simple mirror-type configurations of magnetic field, a potential dip (thermal barrier) appears around this point, being followed by a subsequent potential hump (plug potential) along a collisionless plasma flow. The observed phenomenon gives a clear-cut physics to the formation of field-aligned plug potential with thermal barrier, which is closely related to the double layer formation triggered by a negative dip. (author)
Source
Tanaka, M.Y.; Fujisawa, A.; Todo, Y.; Matsuoka, K. (National Inst. for Fusion Science, Toki, Gifu (Japan)) (eds.); Inutake, M.; Ando, A. (Tohoku Univ., Graduate School of Engineering, Sendai, Miyagi (Japan)) (eds.); 617 p; ISBN 4-9900586-6-6; ; 2001; p. 69-74; ITC-11: 11. international Toki conference on plasma physics and controlled nuclear fusion; Toki, Gifu (Japan); 5-8 Dec 2000; 16 refs., 8 figs.
; 2001; p. 69-74; ITC-11: 11. international Toki conference on plasma physics and controlled nuclear fusion; Toki, Gifu (Japan); 5-8 Dec 2000; 16 refs., 8 figs.
[en] Plasma confinement by surface magnetic (SURMAC) fields is presented for toroidal multipole and linear magnetic mirror systems. The toroidal system is the Dodecapole Surmac device where stable confinement of high temperature (Tsub(i)approx.=500 eV), high density (napprox.=1013 cm-3), and high ß (approx.=8%) plasma is demonstrated. No ballooning mode exists even at ß=8% and the plasma is stable. Guarding of internal hoop supports is investigated and the main loss area is around the field null, with a width of approx.=2rhosub(ci). The loss through a guarded support is estimated to be 2.5% of an unguarded one. (orig./WL)
Journal
Nucl. Instrum. Methods Phys. Res; ISSN 0029-554X; ; v. 207(1/2); p. 207-221
; v. 207(1/2); p. 207-221
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