Page 8 - Demo

022503-8 Steinhauer, Berk, and TAE Team
Phys. Plasmas 25, 022503 (2018)
the average density from single-chord interferometry, and Vs is the integral
of pRs(z)2 between the two “2/3” points.
20If a source were included in the model, the global particle confinement
time would be sN 1⁄4 sinv/(1þsinv/ssrc), which is always smaller than sinv. 21L. C. Steinhauer and T. P. Intrator, Phys. Plasmas 16, 072501 (2009). 22Bohm “scaling” is a conventional yardstick rather than a physics-based
transport rate, although it is roughly consistent with drift transport rates if
qi/Ln 1⁄4 O(1).
23L. 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, and L. C. Steinhauer, Nat. Commun. 7, 13860 (2016).
24T. Otsuka, M. Okubo, S. Okada, and S. Goto, Phys. Plasmas 5, 3649 (1998).
25Parks and Schaffer [P. B. Parks and M. J. Schaffer, Phys. Plasmas 10, 1411 (2003)] analyzed the interchange, finding stability for pmax/ ps < 12/7. The density profile is flatter than the pressure profile since n 􏰁 p1/c and c > 1. For example if c 1⁄4 1.4, interchange stabil- ity requires nmax/ns < 1.47. Further, since hni is close to but slightly less than nmax, the upper bound on hni/ns would be slightly less than 1.47.
26D. D. Ryutov, J. Kesner, and M. E. Mauel, Phys. Plasmas 11, 2318 (2004). 27L. C. Steinhauer, Phys. Plasmas 15, 012505 (2008).