Analytical calculation of neutral transport and its effect on ions

Technical Report · Sat Jun 01 00:00:00 EDT 1991

OSTI ID:5535193

Calvin, M D; Hazeltine, R D; Valanju, P M; Solano, E R ^[1]

---

1. Texas Univ., Austin, TX (USA). Inst. for Fusion Studies Texas Univ., Austin, TX (USA). Fusion Research Center

We analytically calculate the neutral particle distribution and its effects on ion heat and momentum transport in three-dimensional plasmas with arbitrary temperature and density profiles. A general variational principle taking advantage of the simplicity of the charge-exchange (CX) operator is derived to solve self-consistently the neutral-plasma interaction problem. To facilitate an extremal solution, we use the short CX mean-free-path ({lambda}{sub x}) ordering. Further, a non-variational, analytical solution providing a full set of transport coefficient is derived by making the realistic assumption that the product of the CX cross section with relative velocity is constant. The effects of neutrals on plasma energy loss and rotation appear in simple, sensible forms. We find that neutral viscosity dominates ion viscosity everywhere, and in the edge region by a large factor. 13 refs.

• Research Organization: Texas Univ., Austin, TX (United States). Inst. for Fusion Studies
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG05-80ET53088
• OSTI ID: 5535193
• Report Number(s): DOE/ET/53088-489; IFSR-489; ON: DE91015908; TRN: 91-019822
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
NEUTRAL-PARTICLE TRANSPORT
DISTRIBUTION FUNCTIONS
PLASMA
ANALYTICAL SOLUTION
CHARGE EXCHANGE
CHARGED-PARTICLE TRANSPORT
CROSS SECTIONS
KINETIC EQUATIONS
MEAN FREE PATH
VARIATIONAL METHODS
EQUATIONS
FUNCTIONS
RADIATION TRANSPORT
700103* - Fusion Energy- Plasma Research- Kinetics