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- W1978188957 endingPage "1431" @default.
- W1978188957 startingPage "1415" @default.
- W1978188957 abstract "Stability at high beta (the ratio of plasma pressure to magnetic field pressure) is an important requirement for a compact, economically attractive fusion reactor. It is also important in present large tokamak experiments, where the best performance is now often limited by instabilities rather than by energy transport. The past decade has seen major advances in our understanding of the stability of high beta tokamak plasmas, as well as in the achievement of high values of beta. Ideal magnetohydrodynamic (MHD) theory has been remarkably successful in predicting the stability limits, and the scaling of maximum stable beta with the normalized plasma current predicted by Troyon and others has been confirmed in many experiments, yielding a limit βmax≊3.5 (%-m-T/MA) I/aB (where I is the plasma current, a is the minor radius, and B is the toroidal field). The instabilities which are predicted to limit beta have been observed experimentally, in good agreement with theoretical predictions, including long-wavelength kink modes and short-wavelength ballooning instabilities. Advances in understanding of tokamak stability have opened several paths to higher values of beta. The use of strong discharge shaping, approaching the limits of axisymmetric stability, has allowed beta values as high as 12% to be reached in agreement with Troyon scaling. Recent experimental results and ideal MHD modeling have shown that the beta limit depends on the form of the pressure and current density profiles, and modification of the current density to create a centrally peaked profile has allowed beta values up to 6I/aB to be achieved experimentally. Recent experiments have also begun to explore both local and global access to the predicted second stable regime for ballooning modes, with the potential for very high values of β/(I/aB). Preliminary experimental investigations of wall stabilization and radio-frequency (RF) current profile control hold the promise of further improvements in beta through passive and active control of instabilities. The developing understanding of high beta stability and the application of this understanding to present experiments and future fusion devices hold the potential for production of stable, steady state plasmas at high beta with good confinement." @default.
- W1978188957 created "2016-06-24" @default.
- W1978188957 creator A5091062314 @default.
- W1978188957 date "1994-05-01" @default.
- W1978188957 modified "2023-10-01" @default.
- W1978188957 title "Stability of high beta tokamak plasmas*" @default.
- W1978188957 cites W1510730984 @default.
- W1978188957 cites W1964014289 @default.
- W1978188957 cites W1967430383 @default.
- W1978188957 cites W1968114352 @default.
- W1978188957 cites W1968676214 @default.
- W1978188957 cites W1969635572 @default.
- W1978188957 cites W1969929528 @default.
- W1978188957 cites W1971739222 @default.
- W1978188957 cites W1973596328 @default.
- W1978188957 cites W1975796540 @default.
- W1978188957 cites W1976903747 @default.
- W1978188957 cites W1978580051 @default.
- W1978188957 cites W1980548998 @default.
- W1978188957 cites W1980879684 @default.
- W1978188957 cites W1982936246 @default.
- W1978188957 cites W1983866888 @default.
- W1978188957 cites W1988934725 @default.
- W1978188957 cites W1988992337 @default.
- W1978188957 cites W1990630395 @default.
- W1978188957 cites W1991037449 @default.
- W1978188957 cites W1992748046 @default.
- W1978188957 cites W1993821769 @default.
- W1978188957 cites W1995351524 @default.
- W1978188957 cites W1997058252 @default.
- W1978188957 cites W1997848910 @default.
- W1978188957 cites W1999058002 @default.
- W1978188957 cites W2003534636 @default.
- W1978188957 cites W2003823204 @default.
- W1978188957 cites W2004458372 @default.
- W1978188957 cites W2005539531 @default.
- W1978188957 cites W2005896801 @default.
- W1978188957 cites W2007621074 @default.
- W1978188957 cites W2008650837 @default.
- W1978188957 cites W2009776912 @default.
- W1978188957 cites W2011464343 @default.
- W1978188957 cites W2011603770 @default.
- W1978188957 cites W2011720137 @default.
- W1978188957 cites W2013239041 @default.
- W1978188957 cites W2014612529 @default.
- W1978188957 cites W2015420261 @default.
- W1978188957 cites W2017706292 @default.
- W1978188957 cites W2020140725 @default.
- W1978188957 cites W2023710314 @default.
- W1978188957 cites W2024145628 @default.
- W1978188957 cites W2025181336 @default.
- W1978188957 cites W2026801851 @default.
- W1978188957 cites W2026906659 @default.
- W1978188957 cites W2027089391 @default.
- W1978188957 cites W2027326718 @default.
- W1978188957 cites W2027598550 @default.
- W1978188957 cites W2029416864 @default.
- W1978188957 cites W2029862907 @default.
- W1978188957 cites W2033514363 @default.
- W1978188957 cites W2034407276 @default.
- W1978188957 cites W2035998516 @default.
- W1978188957 cites W2036498958 @default.
- W1978188957 cites W2036505033 @default.
- W1978188957 cites W2037778574 @default.
- W1978188957 cites W2038720127 @default.
- W1978188957 cites W2038941545 @default.
- W1978188957 cites W2039166449 @default.
- W1978188957 cites W2039849157 @default.
- W1978188957 cites W2040641278 @default.
- W1978188957 cites W2041798156 @default.
- W1978188957 cites W2042829725 @default.
- W1978188957 cites W2048945904 @default.
- W1978188957 cites W2051702038 @default.
- W1978188957 cites W2052475210 @default.
- W1978188957 cites W2054927295 @default.
- W1978188957 cites W2056086437 @default.
- W1978188957 cites W2056091901 @default.
- W1978188957 cites W2056250512 @default.
- W1978188957 cites W2056838076 @default.
- W1978188957 cites W2059589645 @default.
- W1978188957 cites W2061009005 @default.
- W1978188957 cites W2062619193 @default.
- W1978188957 cites W2062709305 @default.
- W1978188957 cites W2064864449 @default.
- W1978188957 cites W2071631364 @default.
- W1978188957 cites W2072076612 @default.
- W1978188957 cites W2072595914 @default.
- W1978188957 cites W2073567446 @default.
- W1978188957 cites W2075551042 @default.
- W1978188957 cites W2075905189 @default.
- W1978188957 cites W2076056263 @default.
- W1978188957 cites W2079599353 @default.
- W1978188957 cites W2079899511 @default.
- W1978188957 cites W2084298842 @default.
- W1978188957 cites W2084543539 @default.
- W1978188957 cites W2084909100 @default.
- W1978188957 cites W2085135414 @default.
- W1978188957 cites W2085327710 @default.